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Journal articles on the topic 'Teleportation'

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Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2024

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1

GU, YONG-JIAN, CHUN-MEI YAO, ZHENG-WEI ZHOU, and GUANG-CAN GUO. "OUTPUT AND FIDELITY OF IMPERFECT TELEPORTATION." Modern Physics Letters B 18, no. 02n03 (February 10, 2004): 121–28. http://dx.doi.org/10.1142/s0217984904006652.

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Noisy entangled resource and non-standard teleportation operations result in imperfect teleportation. In this paper, we derive an explicit expression for the output states of imperfect teleportation processes, thereby establishing a correspondence between teleportation and quantum channels. This result offers a different insight into teleportation. Also, it enables us to derive an expression for the fidelity of teleportation. Our results analytically reveal the dependence of the output states and the fidelity on the entangled resource and teleportation operations. The Nielsen–Caves teleportation formalism is used in the derivation.

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2

Paulson, K. G., and S. V. M. Satyanarayana. "Relevance of rank for a mixed state quantum teleportation resource." Quantum Information and Computation 14, no. 13&14 (October 2014): 1227–37. http://dx.doi.org/10.26421/qic14.13-14-12.

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Mixed entangled states are generic resource for quantum teleportation. Optimal teleportation fidelity measures the success of quantum teleportation. The relevance of rank in the teleportation process is investigated by constructing three new maximally entangled mixed states (MEMS) of different ranks. Linear entropy, concurrence, optimal teleportation fidelity and Bell function are obtained for each of these states analytically. It is found that mixed states with higher rank are better resource for teleportation. In order to achieve a fixed value of optimal teleportation fidelity, we find that low rank states must have high concurrence. Further, for each of ranks 2, 3 and 4, we numerically generate 30000 maximally entangled mixed states. The analysis of these states reveals the existence of a rank dependent upper bound on optimal teleportation fidelity for a fixed purity. In order to achieve a fixed optimal teleportation fidelity, we find MEMS exhibit a rank dependent lower bound on concurrence. MEMS are classified in terms of their degree of nonlocality. The results are found to be same with logarithmic negativity used as a measure of entanglement.

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3

ADHIKARI, SATYABRATA. "ENTANGLEMENT AND TELEPORTATION IN BIPARTITE SYSTEM." International Journal of Quantum Information 08, no. 07 (October 2010): 1153–67. http://dx.doi.org/10.1142/s0219749910006411.

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We present a mathematical formulation of old teleportation protocol (original teleportation protocol introduced by Bennett et al.) for mixed state and study in detail the role of mixedness of the two-qubit quantum channel in a teleportation protocol. We show that maximally entangled mixed state described by the density matrix of rank-4 will be useful as a two-qubit teleportation channel to teleport a single qubit mixed state when the teleportation channel parameter p1 > 1/2. Also we discuss the case when p1 ≤ 1/2.

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4

Blinova, I. V., and I. Yu Popov. "Multi-qubit teleportation algorithm and teleportation manager." Physics of Particles and Nuclei Letters 8, no. 5 (September 2011): 455–57. http://dx.doi.org/10.1134/s1547477111050037.

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5

Tian, Xiu-Lao, Xiao-Qiang Xi, Guo-Fang Shi, Ming-Liang Hu, and Guo-Guang Yao. "Tensor representation in teleportation and controlled teleportation." Optics Communications 282, no. 24 (December 2009): 4815–18. http://dx.doi.org/10.1016/j.optcom.2009.09.001.

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6

Fatahi, Negin. "Multi-hop teleportation of N-qubit state via Bell states." Modern Physics Letters A 36, no. 08 (February 26, 2021): 2150053. http://dx.doi.org/10.1142/s021773232150053x.

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Multi-hop teleportation is a quantum teleportation scheme for transferring quantum states on a large scale. In this paper, a new multi-hop teleportation protocol is investigated for transferring arbitrary N-qubit states between M-neighbor nodes. In this scheme, intermediate nodes are connected with each other by symmetric entangled Bell states as quantum channels. First, one-hop teleportation of single-qubit, two-qubit and N-qubit states are introduced, then this method is generalized to two-hop and multi-hop teleportation for N-qubit. Also, we calculate the efficiency of this scheme.

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7

HAO, XIANG, and SHIQUN ZHU. "ENHANCED TELEPORTATION THROUGH ANISOTROPIC HEISENBERG QUANTUM SPIN CHAINS." Modern Physics Letters B 22, no. 01 (January 10, 2008): 17–23. http://dx.doi.org/10.1142/s0217984908014535.

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The teleportation via the channel of the thermal equilibrium states in anisotropic Heisenberg XYZ chains is analyzed. It is found that there are the critical temperatures below which entanglement teleportation can be realized. Entanglement teleportation is enhanced through anisotropic XYZ chains in contrast to the isotropic Heisenberg one. Anisotropic spin exchanges can increase these critical temperatures for the teleportation. Entanglement can be transferred in the ferromagnetic anisotropic Heisenberg chain while it cannot be done in the ferromagnetic isotropic one. The average fidelity of the teleportation can be improved in the antiferromagnetic chains.

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8

TIAN, XIU-LAO, and XIAO-QIANG XI. "A GENERAL METHOD TO FIND PROPER CHANNEL FOR THREE-QUBIT STATE TELEPORTATION." International Journal of Quantum Information 07, no. 05 (August 2009): 927–33. http://dx.doi.org/10.1142/s0219749909005535.

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Based on tensor analysis and Bell basis measurement, we propose a general method to find proper channel for successful teleportation of an unknown three-qubit state. Instead of starting from "the proper channel" as that of the previous work, we begin from the successful teleportation then trace back to find which channel is proper and why it is proper for successful teleportation. At last, we give the necessary and sufficient condition for three-qubit perfect teleportation. This condition can guide us to design the corresponding channel for realizing the teleportation. Furthermore, the description of teleporting process with the help of tensor analysis is more compact and clear. Our method can also be generalized to find the channel for N-qubit successful teleportation.

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9

QIN, MENG, XUAN CHEN, and CUI-CUI LIU. "HEAT-BATH-INDUCED DECAY OF TELEPORTATION FIDELITY OF THE X-STATES." International Journal of Modern Physics B 26, no. 15 (June 5, 2012): 1250097. http://dx.doi.org/10.1142/s021797921250097x.

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Quantum entanglement and teleportation of two qubit X-states subject to heat bath is investigated by partial teleportation protocol. We obtain the analytical expressions of the average fidelity for the X-states with one-side decoherence and two-side decoherence. The quality of quantum teleportation with various initial states is investigated by explicitly calculating the concurrence, the output concurrence and the average fidelity. The results demonstrate that the model is suitable for teleportation, which depends on the initial state. However, the mean thermal occupation number of bath and decoherence could induce the decrease of the output entanglement and the average fidelity in the quantum teleportation processing. We also find the quantum teleportation protocol of one-side decoherence is more robust than that of under two-side decoherence.

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10

Armenta, Marco, Thierry Judge, Nathan Painchaud, Youssef Skandarani, Carl Lemaire, Gabriel Gibeau Sanchez, Philippe Spino, and Pierre-Marc Jodoin. "Neural Teleportation." Mathematics 11, no. 2 (January 16, 2023): 480. http://dx.doi.org/10.3390/math11020480.

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In this paper, we explore a process called neural teleportation, a mathematical consequence of applying quiver representation theory to neural networks. Neural teleportation teleports a network to a new position in the weight space and preserves its function. This phenomenon comes directly from the definitions of representation theory applied to neural networks and it turns out to be a very simple operation that has remarkable properties. We shed light on the surprising and counter-intuitive consequences neural teleportation has on the loss landscape. In particular, we show that teleportation can be used to explore loss level curves, that it changes the local loss landscape, sharpens global minima and boosts back-propagated gradients at any moment during the learning process.

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11

KOSSAKOWSKI, A., and M. OHYA. "NEW SCHEME OF QUANTUM TELEPORTATION." Infinite Dimensional Analysis, Quantum Probability and Related Topics 10, no. 03 (September 2007): 411–20. http://dx.doi.org/10.1142/s021902570700283x.

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A new scheme for quantum teleportation is presented, in which teleportation channel from Alice to Bob is always linear and complete (total) teleportation can occur even when an entangled state between Alice and Bob is not maximal.

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12

Addo, Dorcas Attuabea, Steven Abel, Richard Kwame Ansah, and Isaac Nkrumah. "Review on investigating the possibility of local hidden variable theories-quantum teleportation." International Journal of Advanced Mathematical Sciences 6, no. 1 (January 14, 2018): 1. http://dx.doi.org/10.14419/ijams.v6i1.8755.

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The core of the paper was to investigate the possibility of local hidden variable theory and its application in quantum teleportation. We reviewed literature on the Bell's inequality which is necessary for quantum teleportation. Quantum teleportation utilises a single-particle entangled state which can be successfully achieved by the application of the locality assumption which leads to Bell's inequality. A violation of the Bell's inequality signifies the nonlocal nature of a single particle useful for quantum teleportation.

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13

Nishantha Muththanthirige. "Exploring the phenomenon of quantum teleportation of epigenetic information in plants: Implications for the transfer of genome-stored experiences to close relatives." International Journal of Science and Research Archive 9, no. 1 (June 30, 2023): 442–48. http://dx.doi.org/10.30574/ijsra.2023.9.1.0466.

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Quantum teleportation is a fascinating phenomenon that has garnered significant attention in the field of physics. Recent research suggest that quantum teleportation may extend beyond the realm of fundamental particles and apply to complex biological systems. In this review article, the phenomenon of quantum teleportation of epigenetic information in plants and its potential implications for the transfer of genome-stored experience to close relatives is explored. The article begins by providing an introduction to the concept of quantum teleportation and its underlying principles. Then, the emerging field of epigenetics is delved into, discussing the role of epigenetic modifications in plant adaptation and response to environmental stimuli. Subsequently, the existing evidence for the transfer of epigenetic information between plants through horizontal gene transfer is presented, along with the exploration of the possibility of quantum teleportation as an alternative mechanism for such transfers. The implications of quantum teleportation for the transfer of genome-stored experience are discussed, including the potential impact on plant evolution and adaptation. Furthermore, the challenges and limitations in studying quantum phenomena in biological systems are addressed, and future directions for research in this exciting field are proposed. In conclusion, while the phenomenon of quantum teleportation of epigenetic information in plants holds promise, further investigation is required to fully understand its mechanisms and implications. This knowledge will provide insights into the feasibility and mechanisms of quantum teleportation in plants.

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14

Toyama, F. M., and K. Saito. "A time-dependent model for teleportation of a quantum state of position and momentum." Canadian Journal of Physics 83, no. 7 (July 1, 2005): 687–98. http://dx.doi.org/10.1139/p05-028.

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We present a time-dependent model for teleportation of an unknown quantum state of position and momentum. With this model, we analyze a situation in which Bob (receiver) is ignorant of the Hamiltonian that describes the time-evolution of a post-measurement state generated at Bob's site. We illustrate that the time-evolution of the post-measurement state deteriorates the fidelity of the quantum teleportation. We also illustrate a special situation in which a two-mode input state is transformed into a one-mode state by the teleportation. In addition, we discuss an optimal situation in which a high teleportation probability and a high degree of teleportation fidelity can be achieved.PACS Nos.: 03.65.w, 03.67.Hk

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15

Yang, Yu-Guang, Sheng-Nan Cao, Wei-Feng Cao, Dan Li, Yi-Hua Zhou, and Wei-Min Shi. "Generalized teleportation by means of discrete-time quantum walks on N-lines and N-cycles." Modern Physics Letters B 33, no. 06 (February 28, 2019): 1950070. http://dx.doi.org/10.1142/s0217984919500702.

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Recently, Wang et al. [Wang et al., Quantum Inf. Process. 16 (2017) 221] developed generalized teleportation schemes based on different quantum walks structures. In their paper, an interesting open question is whether there are other graphs suitable for teleportation. Here, we extend the results of quantum teleportation of an unknown qubit state by means of discrete-time quantum walks and propose two kinds of schemes for quantum teleportation by means of discrete-time quantum walks on N-lines and N-cycles, respectively. Likewise, prior quantum entanglement is unnecessary for teleportation and quantum entanglement is generated by means of quantum walks. This further opens wider applications of quantum walks in quantum communication protocols.

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16

VAIDMAN, L., N. EREZ, and A. RETZKER. "ANOTHER LOOK AT QUANTUM TELEPORTATION." International Journal of Quantum Information 04, no. 01 (February 2006): 197–208. http://dx.doi.org/10.1142/s0219749906001700.

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A dialog with Asher Peres regarding the meaning of quantum teleportation is briefly reviewed. The Braunstein–Kimble method for teleportation of light is analyzed in the language of quantum wave functions. A pictorial example of continuous variable teleportation is presented using computer simulation.

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17

Fitzgerald, Barry W., Patrick Emonts, and Jordi Tura. "A Christmas story about quantum teleportation." Physics Education 59, no. 3 (April 19, 2024): 035021. http://dx.doi.org/10.1088/1361-6552/ad2cf4.

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Abstract Quantum teleportation is a concept that fascinates and confuses many people, in particular, given that it combines quantum physics and the concept of teleportation. With quantum teleportation likely to play a key role in several communication technologies and the quantum internet in the future, it is imperative to create learning tools and approaches that can accurately and effectively communicate the concept. Recent research has indicated the importance of teachers enthusing students about the topic of quantum physics. Therefore, educators at both high school and early university level need to find engaging and perhaps unorthodox ways of teaching complex, yet interesting topics such as quantum teleportation. In this paper, we present a paradigm to teach the concept of quantum teleportation using the Christmas gift-bringer Santa Claus. Using the example of Santa Claus, we use an unusual context to explore the key aspects of quantum teleportation, and all without being overly abstract. In addition, we outline a worksheet designed for use in the classroom setting which is based on common naive conceptions from quantum physics. This worksheet will be evaluated as a classroom resource to teach quantum teleportation in a subsequent study.

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18

TIAN, XIU-LAO, WEI ZHANG, MEI-XIA ZHAO, and XIAO-QIANG XI. "UNITARY TRANSFORMATION IN PROBABILISTIC TELEPORTATION." International Journal of Quantum Information 10, no. 05 (August 2012): 1250061. http://dx.doi.org/10.1142/s021974991250061x.

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We proposed a general transformation in probabilistic teleportation, which is based on different entanglement matching coefficients K corresponding to different unitary evolution which provides one with more flexible evolution method experimentally. Through analysis based on the Bell basis and generalized Bell basis measurement for two probabilistic teleportation, we suggested a general probability of successful teleportation, which is not only determined by the entanglement degree of transmission channels and measurement methods, but also related to the unitary transformation in the teleportation process.

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19

Wang, Zhan-Yun, Yi-Tao Gou, Jin-Xing Hou, Li-Ke Cao, and Xiao-Hui Wang. "Probabilistic Resumable Quantum Teleportation of a Two-Qubit Entangled State." Entropy 21, no. 4 (April 1, 2019): 352. http://dx.doi.org/10.3390/e21040352.

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We explicitly present a generalized quantum teleportation of a two-qubit entangled state protocol, which uses two pairs of partially entangled particles as quantum channel. We verify that the optimal probability of successful teleportation is determined by the smallest superposition coefficient of these partially entangled particles. However, the two-qubit entangled state to be teleported will be destroyed if teleportation fails. To solve this problem, we show a more sophisticated probabilistic resumable quantum teleportation scheme of a two-qubit entangled state, where the state to be teleported can be recovered by the sender when teleportation fails. Thus the information of the unknown state is retained during the process. Accordingly, we can repeat the teleportion process as many times as one has available quantum channels. Therefore, the quantum channels with weak entanglement can also be used to teleport unknown two-qubit entangled states successfully with a high number of repetitions, and for channels with strong entanglement only a small number of repetitions are required to guarantee successful teleportation.

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20

Huang, Chunhui, and Bichun Wu. "High fidelity quantum teleportation assistance with quantum neural network." Modern Physics Letters B 28, no. 24 (September 20, 2014): 1450189. http://dx.doi.org/10.1142/s0217984914501899.

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In this paper, a high fidelity scheme of quantum teleportation based on quantum neural network (QNN) is proposed. The QNN is composed of multi-bit control-not gates. The quantum teleportation of a qubit state via two-qubit entangled channels is investigated by solving the master equation in Lindblad operators with a noisy environment. To ensure the security of quantum teleportation, the indirect training of QNN is employed. Only 10% of teleported information is extracted for the training of QNN parameters. Then the outputs are corrected by the other QNN at Bob's side. We build a random series of numbers ranged in [0, π] as inputs and simulate the properties of our teleportation scheme. The results show that the fidelity of quantum teleportation system is significantly improved to approach 1 by the error-correction of QNN. It illustrates that the distortion can be eliminated perfectly and the high fidelity of quantum teleportation could be implemented.

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21

Berry, Brian J. L. "TELEPORTATION ARRIVES." Urban Geography 22, no. 4 (May 2001): 302–5. http://dx.doi.org/10.2747/0272-3638.22.4.302.

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22

Dür, W., and J. I. Cirac. "Multiparty teleportation." Journal of Modern Optics 47, no. 2-3 (February 2000): 247–55. http://dx.doi.org/10.1080/09500340008244039.

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23

Dur, W., and J. I. Cirac. "Multiparty teleportation." Journal of Modern Optics 47, no. 2-3 (February 15, 2000): 247–55. http://dx.doi.org/10.1080/095003400148178.

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24

Walther, Philip. "Spooky teleportation." Nature Physics 2, no. 10 (October 2006): 655–56. http://dx.doi.org/10.1038/nphys425.

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25

Sudbery, Tony. "Instant teleportation." Nature 362, no. 6421 (April 1993): 586–87. http://dx.doi.org/10.1038/362586a0.

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26

Li, Xihan, and Fuguo Deng. "Controlled teleportation." Frontiers of Computer Science in China 2, no. 2 (June 2008): 147–60. http://dx.doi.org/10.1007/s11704-008-0020-0.

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27

Slavnov, D. A. "Quantum teleportation." Theoretical and Mathematical Physics 157, no. 1 (October 2008): 1433–47. http://dx.doi.org/10.1007/s11232-008-0118-4.

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28

Ralph, Timothy C. "Reliable teleportation." Nature 500, no. 7462 (August 14, 2013): 282–83. http://dx.doi.org/10.1038/500282a.

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29

FURUSAWA, Akira. "Quantum Teleportation." Hyomen Kagaku 32, no. 12 (2011): 801–3. http://dx.doi.org/10.1380/jsssj.32.801.

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30

Kauffman, L. H. "Teleportation Topology." Optics and Spectroscopy 99, no. 2 (2005): 227. http://dx.doi.org/10.1134/1.2034609.

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31

Zeilinger, Anton. "Quantum Teleportation." Scientific American 282, no. 4 (April 2000): 50–59. http://dx.doi.org/10.1038/scientificamerican0400-50.

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32

Prakash, Hari. "Quantum teleportation." Indian Journal of Physics 84, no. 8 (August 2010): 1021–29. http://dx.doi.org/10.1007/s12648-010-0096-x.

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33

Braunstein, Samuel L. "Quantum Teleportation." Fortschritte der Physik 50, no. 5-7 (May 2002): 608–13. http://dx.doi.org/10.1002/1521-3978(200205)50:5/7<608::aid-prop608>3.0.co;2-f.

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34

Bédard, Charles Alexandre. "Teleportation Revealed." Quantum Reports 5, no. 2 (June 13, 2023): 510–25. http://dx.doi.org/10.3390/quantum5020034.

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Quantum teleportation is the name of a problem: How can the real-valued parameters encoding the state at Alice’s location make their way to Bob’s location via shared entanglement and only two bits of classical communication? Without an explanation, teleportation appears to be a conjuring trick. Investigating the phenomenon with Schrödinger states and reduced density matrices shall always leave loose ends because they are not local and complete descriptions of quantum systems. Upon demonstrating that the Heisenberg picture admits a local and complete description, Deutsch and Hayden rendered its explanatory power manifest by revealing the trick behind teleportation, namely, by providing an entirely local account. Their analysis is re-exposed and further developed.

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35

Roszak, Katarzyna, and Jarosław K. Korbicz. "Purifying teleportation." Quantum 7 (February 16, 2023): 923. http://dx.doi.org/10.22331/q-2023-02-16-923.

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Coupling to the environment typically suppresses quantum properties of physical systems via decoherence mechanisms. This is one of the main obstacles in practical implementations of quantum protocols. In this work we show how decoherence effects can be reversed/suppressed during quantum teleportation in a network scenario. Treating the environment quantumly, we show that under a general pure dephasing coupling, performing a second teleportation step can probabilistically reverse the decoherence effects if certain commutativity conditions hold. This effect is purely quantum and most pronounced for qubit systems, where in 25 % of instances the decoherence can be reversed completely. As an example, we show the effect in a physical model of a qubit register coupled to a bosonic bath. We also analyze general d-dimensional systems, identifying all instances of decoherence suppression. Our results are proof-of-concept but we believe will be relevant for the emerging field of quantum networks as teleportation is the key building block of network protocols.

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36

Belinsky, A. V., A. P. Grigorieva, and I. I. Dzhadan. "Multiphoton quantum teleportation." Seriya 3: Fizika, Astronomiya, no. 5_2023 (November 29, 2023): 2350104–1. http://dx.doi.org/10.55959/msu0579-9392.78.2350104.

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37

Nagamachi, S., and E. Brüning. "Quantum Teleportation and Holomorphic Representation of CCR." Open Systems & Information Dynamics 15, no. 02 (June 2008): 155–72. http://dx.doi.org/10.1142/s1230161208000146.

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For the treatment of teleportation of continuous quantum variables, often the Wigner functions are used. In this paper, we will show that by using the holomorphic representation of the canonical commutation relations (CCR), the teleportation of continuous quantum variables is treated in a parallel way as the teleportation of qubits.

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Meng, Zuan, Shi-Feng Zhang, Liu-Yong Cheng, and Hong-Fu Wang. "Probabilistic resumable quantum teleportation for an arbitrary two-qubit entangled state with different quantum channels." Laser Physics 33, no. 2 (December 29, 2022): 025201. http://dx.doi.org/10.1088/1555-6611/acab54.

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Abstract We propose two probabilistic resumable quantum teleportation schemes for an arbitrary two-qubit entangled state with different quantum channels. The characteristic of our schemes is that the initial state in the sender’s hand can be recovered instead of being destroyed when teleportation fails, so we can improve the success probabilities by repeating the teleportation process more times. The analysis results show that the number of repetitions required for successful teleportation depends on the entanglement strength of the quantum channels, and even weak entanglement enables a high probability of success.

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ZHA, XIN-WEI, and HAI-YANG SONG. "TELEPORTATION AND CONTROLLED TELEPORTATION WITH MAXIMALLY FOUR-QUBIT ENTANGLEMENT QUANTUM STATES." Modern Physics Letters B 24, no. 19 (July 30, 2010): 2069–76. http://dx.doi.org/10.1142/s0217984910024444.

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Recently Paolo Facchi et al.15 presented a maximally multipartite entangled state (MMES). It is shown that some of these states can be utilized for perfect teleportation of arbitrary two-qubit systems and controlled teleportation of an arbitrary one-qubit state. Furthermore, the optimal match measuring basis are given by transformation operator for controlled teleportation.

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Chowdhury, Sohan, William Delamare, Pourang Irani, and Khalad Hasan. "PAWS: Personalized Arm and Wrist Movements With Sensitivity Mappings for Controller-Free Locomotion in Virtual Reality." Proceedings of the ACM on Human-Computer Interaction 7, MHCI (September 11, 2023): 1–21. http://dx.doi.org/10.1145/3604264.

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Virtual Reality (VR) headsets equipped with multiple cameras enable hands-only teleportation techniques without requiring any physical controller. Hands-only teleportation is an effective alternative to controllers for navigation tasks in virtual reality - allowing users to move from one point to another instantaneously. However, the current implementation of hands-only techniques does not consider users' physical attributes (e.g., arm's reach). Thus, a hands-only teleportation technique can lead to different user experiences based on physical attributes. We propose PAWS, a personalized arm and wrist-based teleportation technique that incorporates users' physical attributes for improved teleportation experiences. We first evaluate different degrees of teleportation personalization with no-, partial, and full personalization. We find that full personalization offers faster locomotion - but at the cost of degraded performances with distant targets due to increased sensitivity. We hence further explore different combinations of mapping functions (e.g., sigmoid, quadratic) to personalize motor movements and find that asymmetric functions result in improved performance. Overall, our results show that PAWS helps users to navigate quickly in virtual environments.

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Marzolino, Ugo, and Andreas Buchleitner. "Performances and robustness of quantum teleportation with identical particles." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 472, no. 2185 (January 2016): 20150621. http://dx.doi.org/10.1098/rspa.2015.0621.

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When quantum teleportation is performed with truly identical massive particles, indistinguishability allows us to teleport addressable degrees of freedom which do not identify particles, but, for example, orthogonal modes. The key resource of the protocol is a state of entangled modes, but the conservation of the total number of particles does not allow for perfect deterministic teleportation unless the number of particles in the resource state goes to infinity. Here, we study the convergence of teleportation performances in the above limit and provide sufficient conditions for asymptotic perfect teleportation. We also apply these conditions to the case of resource states affected by noise.

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42

Pyrkov, A. N., and T. Byrnes. "Teleporting a Macroscopic Ensemble of Spins." Asia Pacific Physics Newsletter 04, no. 01 (October 23, 2015): 61–62. http://dx.doi.org/10.1142/s2251158x15000247.

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Quantum teleportation is one of the most enigmatic protocols realized so far in the area of quantum information, allowing for the transfer of quantum information assisted by an entangled state. It was a subject of science fiction 20 years ago, but now is a fundamental experimental protocol and quantum primitive for quantum information processing tasks. There have been many successful realizations of teleportation ranging from those using photons, atoms, and hybrid systems and long-range teleportation beyond 100km has already been achieved multiple times. These however typically involve explicitly single particle systems or effective few-particle systems. For larger (visible to the naked eye) objects involving many particles, teleportation is typically more difficult due to the fast decoherence such macroscopic objects suffer. In this case, the entanglement disappears almost as soon as it is created, making it useless for such tasks. More recently, teleportation was accomplished in the continuous variables (CV) framework between two atomic ensembles [1]. As remarkable as these achievements are, teleportation schemes that are known today (qubit/CV) do not allow us to teleport more complex quantum states at the macroscopic level. For example, while it is possible in principle to extend teleportation to multiple qubits, on a macroscopic level this is prohibitively complicated and highly susceptible to decoherence. For atomic ensemble CV based schemes, the teleported states are restricted to small displacements from the completely Sx-polarized state on the Bloch sphere.

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Cardoso-Isidoro, Carlos, and Francisco Delgado. "Symmetries in Teleportation Assisted by N-Channels under Indefinite Causal Order and Post-Measurement." Symmetry 12, no. 11 (November 20, 2020): 1904. http://dx.doi.org/10.3390/sym12111904.

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Quantum teleportation has had notorious advances in the last decade, being successfully deployed in the experimental domain. In other terrains, the understanding of indefinite causal order has demonstrated a valuable enhancement in quantum communication to correct channel imperfections. In this work, we address the symmetries underlying imperfect teleportation when it is assisted by indefinite causal order to correct the use of noisy entangled resources. In the strategy being presented, indefinite causal order introduces a control state to address the causal ordering. Then, by using post-selection, it fulfills the teleportation enhancement to recover the teleported state by constructive interference. By analysing primarily sequential teleportation under definite causal order, we perform a comparison basis for notable outcomes derived from indefinite causal order. After, the analysis is conducted by increasing the number of teleportation processes, thus suggesting additional alternatives to exploit the most valuable outcomes in the process by adding weak measurement as a complementary strategy. Finally, we discuss the current affordability for an experimental implementation.

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Adhikari, S., A. S. Majumdar, S. Roy, B. Ghosh, and N. Nayak. "Teleportation via maximally and non-maximally entangled mixed states." Quantum Information and Computation 10, no. 5&6 (May 2010): 398–419. http://dx.doi.org/10.26421/qic10.5-6-3.

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We study the efficiency of two-qubit mixed entangled states as resources for quantum teleportation. We first consider two maximally entangled mixed states, viz., the Werner state\cite{werner}, and a class of states introduced by Munro {\it et al.} \cite{munro}. We show that the Werner state when used as teleportation channel, gives rise to better average teleportation fidelity compared to the latter class of states for any finite value of mixedness. We then introduce a non-maximally entangled mixed state obtained as a convex combination of a two-qubit entangled mixed state and a two-qubit separable mixed state. It is shown that such a teleportation channel can outperform another non-maximally entangled channel, viz., the Werner derivative for a certain range of mixedness. Further, there exists a range of parameter values where the former state satisfies a Bell-CHSH type inequality and still performs better as a teleportation channel compared to the Werner derivative even though the latter violates the inequality.

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Huo, Meiru, Jiliang Qin, Jialin Cheng, Zhihui Yan, Zhongzhong Qin, Xiaolong Su, Xiaojun Jia, Changde Xie, and Kunchi Peng. "Deterministic quantum teleportation through fiber channels." Science Advances 4, no. 10 (October 2018): eaas9401. http://dx.doi.org/10.1126/sciadv.aas9401.

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Quantum teleportation, which is the transfer of an unknown quantum state from one station to another over a certain distance with the help of nonlocal entanglement shared by a sender and a receiver, has been widely used as a fundamental element in quantum communication and quantum computation. Optical fibers are crucial information channels, but teleportation of continuous variable optical modes through fibers has not been realized so far. Here, we experimentally demonstrate deterministic quantum teleportation of an optical coherent state through fiber channels. Two sub-modes of an Einstein-Podolsky-Rosen entangled state are distributed to a sender and a receiver through a 3.0-km fiber, which acts as a quantum resource. The deterministic teleportation of optical modes over a fiber channel of 6.0 km is realized. A fidelity of 0.62 ± 0.03 is achieved for the retrieved quantum state, which breaks through the classical limit of1/2. Our work provides a feasible scheme to implement deterministic quantum teleportation in communication networks.

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HU, KE-XIANG, YAN-WEI WANG, BAI-QI JIN, and YI-ZHUANG ZHENG. "TELEPORTING AN ARBITRARY TWO-PARTICLE STATE VIA W OR W-LIKE STATE." International Journal of Quantum Information 06, no. 05 (October 2008): 1041–49. http://dx.doi.org/10.1142/s0219749908003700.

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In this paper, we present a scheme for quantum teleportation of an arbitrary two-particle state via entangled W state or W-like state channels. We find that the success of teleportation is probabilistic and the corresponding probability only relates to the smaller coefficients of the quantum channels. We further show that the quantum teleportation could achieve higher probability using W-like state as a channel than the W state.

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TIAN, XIU-LAO. "TRANSFORMATION MATRIX OF NETWORK-CONTROLLED TELEPORTATION." Modern Physics Letters B 23, no. 30 (December 10, 2009): 3609–19. http://dx.doi.org/10.1142/s021798490902165x.

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According to the collapse principle of quantum state when being measured, we present a method of directly writing out transformation matrix by looking at the figure of a network-controlled quantum channel. We find the rule of constructing transformation matrix in network-controlled teleportation. Based on this method, we gain transformation matrix of two-qubit state teleportation in which two GHZ state act as controlled quantum channels. We further proposed a scheme of one-qubit teleportation by a series-controlled quantum channel and teleportation of three-qubit via a typical network controlled quantum channel, in which two-qubit state instead of GHZ state act as quantum channel. So, Hadamard operation is not necessary in our scheme.

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Maroofkhani, Farhad, Kazuo Ishii, Saeed Shiry Ghidary, and Amir Ali Forough Nassiraei. "3P2-L04 Teleportation and Haptic system for car in Force Reflecting Passivity Based Teleportation(Robots for Works (2))." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2014 (2014): _3P2—L04_1—_3P2—L04_4. http://dx.doi.org/10.1299/jsmermd.2014._3p2-l04_1.

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Cai, Donglin, and Menghan Dong. "The Progress and the state-of-art approaches of Quantum Teleportation and Communication." Highlights in Science, Engineering and Technology 5 (July 7, 2022): 62–67. http://dx.doi.org/10.54097/hset.v5i.724.

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Quantum teleportation is a new technique utilized dispersed quantum entanglement to transmit information (i.e., the quantum states). In this paper, the principles and the protocol will be introduced systematically. Specifically, the experimental setups and the state-of-art applications will be discussed. According to the analysis, one can better understand the working principle and current development of quantum teleportation. However, the limitation of further applying the quantum teleportation is obvious the cost of building the QT infrastructure and the superconducting technology. Besides, it is also too expensive to achieve large-scale use and commercial promotion. In the future, QT will expand its industrial scale and build a national or even global quantum communication network. These results shed light on guiding further development for quantum teleportation important.

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Nancy, A., and S. Balakrishnan. "Concatenated deleting machines and their characteristics." Communications in Theoretical Physics 75, no. 3 (March 1, 2023): 035104. http://dx.doi.org/10.1088/1572-9494/acb3b4.

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Abstract In this work, we study the performance of one shot and concatenated deleting machines (DMs). We show that the output state of one shot DMs are mixed inseparable, and do not violate Bell’s inequality but can be used as a teleportation channel for all values of the input state parameters. On the other hand, we observe in the concatenation of different DMs that the output states are mixed inseparable and do not violate Bell’s inequality, and cannot be used as a teleportation channel. Further, some important attributes such as inseparability, violation of Bell’s inequality, and teleportation fidelity of the DMs remain unchanged under the order of concatenation. In this context of a teleportation channel, one shot DMs are useful when compared to concatenated DMs.

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