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Journal articles on the topic 'Molecular electronic qubits'

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Author: Grafiati

Published: 10 March 2023

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1

CAO, WEN-ZHEN, LI-JIE TIAN, HUI-JUAN JIANG, and CHONG LI. "SINGLE QUBIT MANIPULATION IN HETERONUCLEAR DIATOMIC MOLECULAR SYSTEM." International Journal of Quantum Information 06, no. 06 (December 2008): 1223–30. http://dx.doi.org/10.1142/s0219749908004390.

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We propose a scenario to realize quantum computers utilizing heteronuclear diatomic rovibrational states as qubits. We focused on rovibrational qubits created by simple transform limited infrared laser pulse instead of using chirped pulse. Numerical calculations show that single qubit gate operation in the electronic ground state of LiH molecule can be obtained. We also discuss the effect of temperature on the initially rotational states, and a suitable experiment condition is indicated.

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2

Koiller, Belita, Xuedong Hu, Rodrigo B. Capaz, Adriano S. Martins, and Sankar Das Sarma. "Silicon-based spin and charge quantum computation." Anais da Academia Brasileira de Ciências 77, no. 2 (June 2005): 201–22. http://dx.doi.org/10.1590/s0001-37652005000200002.

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Silicon-based quantum-computer architectures have attracted attention because of their promise for scalability and their potential for synergetically utilizing the available resources associated with the existing Si technology infrastructure. Electronic and nuclear spins of shallow donors (e.g. phosphorus) in Si are ideal candidates for qubits in such proposals due to the relatively long spin coherence times. For these spin qubits, donor electron charge manipulation by external gates is a key ingredient for control and read-out of single-qubit operations, while shallow donor exchange gates are frequently invoked to perform two-qubit operations. More recently, charge qubits based on tunnel coupling in P+2 substitutional molecular ions in Si have also been proposed. We discuss the feasibility of the building blocks involved in shallow donor quantum computation in silicon, taking into account the peculiarities of silicon electronic structure, in particular the six degenerate states at the conduction band edge. We show that quantum interference among these states does not significantly affect operations involving a single donor, but leads to fast oscillations in electron exchange coupling and on tunnel-coupling strength when the donor pair relative position is changed on a lattice-parameter scale. These studies illustrate the considerable potential as well as the tremendous challenges posed by donor spin and charge as candidates for qubits in silicon.

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3

Benci, Tesi, Atzori, Sessoli, and Torre. "Spin Dynamics and Phonons, Insights into Potential Molecular Qubits." Proceedings 26, no. 1 (September 5, 2019): 46. http://dx.doi.org/10.3390/proceedings2019026046.

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4

Sproules, Stephen. "Electronic structure study of divanadium complexes with rigid covalent coordination: potential molecular qubits with slow spin relaxation." Dalton Transactions 50, no. 14 (2021): 4778–82. http://dx.doi.org/10.1039/d1dt00709b.

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5

Picó-Cortés, Jordi, and Gloria Platero. "Dynamical second-order noise sweetspots in resonantly driven spin qubits." Quantum 5 (December 23, 2021): 607. http://dx.doi.org/10.22331/q-2021-12-23-607.

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Quantum dot-based quantum computation employs extensively the exchange interaction between nearby electronic spins in order to manipulate and couple different qubits. The exchange interaction, however, couples the qubit states to charge noise, which reduces the fidelity of the quantum gates that employ it. The effect of charge noise can be mitigated by working at noise sweetspots in which the sensitivity to charge variations is reduced. In this work we study the response to charge noise of a double quantum dot based qubit in the presence of ac gates, with arbitrary driving amplitudes, applied either to the dot levels or to the tunneling barrier. Tuning with an ac driving allows to manipulate the sign and strength of the exchange interaction as well as its coupling to environmental electric noise. Moreover, we show the possibility of inducing a second-order sweetspot in the resonant spin-triplet qubit in which the dephasing time is significantly increased.

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6

Kintzel, Benjamin, Michael Böhme, Junjie Liu, Anja Burkhardt, Jakub Mrozek, Axel Buchholz, Arzhang Ardavan, and Winfried Plass. "Molecular electronic spin qubits from a spin-frustrated trinuclear copper complex." Chemical Communications 54, no. 92 (2018): 12934–37. http://dx.doi.org/10.1039/c8cc06741d.

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The trinuclear copper(ii) complex [Cu₃(saltag)(py)₆]ClO₄ (H₅saltag = tris(2-hydroxybenzylidene)triaminoguanidine) was synthesized and characterized by experimental as well as theoretical methods.

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7

Issah, Ibrahim, Mohsin Habib, and Humeyra Caglayan. "Long-range qubit entanglement via rolled-up zero-index waveguide." Nanophotonics 10, no. 18 (November 17, 2021): 4579–89. http://dx.doi.org/10.1515/nanoph-2021-0453.

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Abstract Preservation of an entangled state in a quantum system is one of the major goals in quantum technological applications. However, entanglement can be quickly lost into dissipation when the effective interaction among the qubits becomes smaller compared to the noise-injection from the environment. Thus, a medium that can sustain the entanglement of distantly spaced qubits is essential for practical implementations. This work introduces the fabrication of a rolled-up zero-index waveguide which can serve as a unique reservoir for the long-range qubit–qubit entanglement. We also present the numerical evaluation of the concurrence (entanglement measure) via Ansys Lumerical FDTD simulations using the parameters determined experimentally. The calculations demonstrate the feasibility and supremacy of the experimental method. We develop and fabricate this novel structure using cost-effective self-rolling techniques. The results of this study redefine the range of light-matter interactions and show the potential of the rolled-up zero-index waveguides for various classical and quantum applications such as quantum communication, quantum information processing, and superradiance.

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8

Korsbakken, Jan I., Frank K. Wilhelm, and K. Birgitta Whaley. "Electronic structure of superposition states in flux qubits." Physica Scripta T137 (December 2009): 014022. http://dx.doi.org/10.1088/0031-8949/2009/t137/014022.

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9

Jeong, Hyunseok. "Converting qubits." Nature Photonics 17, no. 2 (February 2023): 131–32. http://dx.doi.org/10.1038/s41566-022-01147-z.

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10

Simoni, Mario, Giovanni Amedeo Cirillo, Giovanna Turvani, Mariagrazia Graziano, and Maurizio Zamboni. "Towards Compact Modeling of Noisy Quantum Computers: A Molecular-Spin-Qubit Case of Study." ACM Journal on Emerging Technologies in Computing Systems 18, no. 1 (January 31, 2022): 1–26. http://dx.doi.org/10.1145/3474223.

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Classical simulation of Noisy Intermediate Scale Quantum computers is a crucial task for testing the expected performance of real hardware. The standard approach, based on solving Schrödinger and Lindblad equations, is demanding when scaling the number of qubits in terms of both execution time and memory. In this article, attempts in defining compact models for the simulation of quantum hardware are proposed, ensuring results close to those obtained with standard formalism. Molecular Nuclear Magnetic Resonance quantum hardware is the target technology, where three non-ideality phenomena—common to other quantum technologies—are taken into account: decoherence, off-resonance qubit evolution, and undesired qubit-qubit residual interaction. A model for each non-ideality phenomenon is embedded into a MATLAB simulation infrastructure of noisy quantum computers. The accuracy of the models is tested on a benchmark of quantum circuits, in the expected operating ranges of quantum hardware. The corresponding outcomes are compared with those obtained via numeric integration of the Schrödinger equation and the Qiskit’s QASMSimulator. The achieved results give evidence that this work is a step forward towards the definition of compact models able to provide fast results close to those obtained with the traditional physical simulation strategies, thus paving the way for their integration into a classical simulator of quantum computers.

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11

Lunghi, Alessandro, and Stefano Sanvito. "Electronic spin-spin decoherence contribution in molecular qubits by quantum unitary spin dynamics." Journal of Magnetism and Magnetic Materials 487 (October 2019): 165325. http://dx.doi.org/10.1016/j.jmmm.2019.165325.

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12

Fataftah, Majed S., and Danna E. Freedman. "Progress towards creating optically addressable molecular qubits." Chemical Communications 54, no. 98 (2018): 13773–81. http://dx.doi.org/10.1039/c8cc07939k.

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13

Lunghi, Alessandro, and Stefano Sanvito. "How do phonons relax molecular spins?" Science Advances 5, no. 9 (September 2019): eaax7163. http://dx.doi.org/10.1126/sciadv.aax7163.

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The coupling between electronic spins and lattice vibrations is fundamental for driving relaxation in magnetic materials. The debate over the nature of spin-phonon coupling dates back to the 1940s, but the role of spin-spin, spin-orbit, and hyperfine interactions has never been fully established. Here, we present a comprehensive study of the spin dynamics of a crystal of Vanadyl-based molecular qubits by means of first-order perturbation theory and first-principles calculations. We quantitatively determine the role of the Zeeman, hyperfine, and electronic spin dipolar interactions in the direct mechanism of spin relaxation. We show that, in a high magnetic field regime, the modulation of the Zeeman Hamiltonian by the intramolecular components of the acoustic phonons dominates the relaxation mechanism. In low fields, hyperfine coupling takes over, with the role of spin-spin dipolar interaction remaining the less important for the spin relaxation.

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14

Musfeldt, Janice L., Zhenxian Liu, Diego López-Alcalá, Yan Duan, Alejandro Gaita-Ariño, José J. Baldoví, and Eugenio Coronado. "Vibronic Relaxation Pathways in Molecular Spin Qubit Na9[Ho(W5O18)2]·35H2O under Pressure." Magnetochemistry 9, no. 2 (February 9, 2023): 53. http://dx.doi.org/10.3390/magnetochemistry9020053.

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In order to explore how spectral sparsity and vibronic decoherence pathways can be controlled in a model qubit system with atomic clock transitions, we combined diamond anvil cell techniques with synchrotron-based far infrared spectroscopy and first-principles calculations to reveal the vibrational response of Na9[Ho(W5O18)2]·35H2O under compression. Because the hole in the phonon density of states acts to reduce the overlap between the phonons and f manifold excitations in this system, we postulated that pressure might move the HoO4 rocking, bending, and asymmetric stretching modes that couple with the MJ = ±5, ±2, and ±7 levels out of resonance, reducing their interactions and minimizing decoherence processes, while a potentially beneficial strategy for some molecular qubits, pressure slightly hardens the phonons in Na9[Ho(W5O18)2]·35H2O and systematically fills in the transparency window in the phonon response. The net result is that the vibrational spectrum becomes less sparse and the overlap with the various MJ levels of the Ho3+ ion actually increases. These findings suggest that negative pressure, achieved using chemical means or elongational strain, could further open the transparency window in this rare earth-containing spin qubit system, thus paving the way for the use of device surfaces and interface elongational/compressive strains to better manage decoherence pathways.

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15

Rogers, Lachlan, and Fedor Jelezko. "Robust light-controlled qubits." Nature Photonics 10, no. 3 (February 26, 2016): 147–48. http://dx.doi.org/10.1038/nphoton.2016.29.

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16

Besedin, I. S., G. P. Fedorov, A. Yu Dmitriev, and V. V. Ryazanov. "Superconducting qubits in Russia." Quantum Electronics 48, no. 10 (October 31, 2018): 880–85. http://dx.doi.org/10.1070/qel16795.

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17

Rundle, Russell P., and Mark J. Everitt. "An informationally complete Wigner function for the Tavis–Cummings model." Journal of Computational Electronics 20, no. 6 (October 21, 2021): 2180–88. http://dx.doi.org/10.1007/s10825-021-01777-6.

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AbstractHere we consider an informationally complete Wigner function approach to look at multiple atoms (qubits) coupled to a field mode. We consider the Tavis–Cummings interaction between a single field mode with two qubits and then with five.

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18

Pedram, AH, Onur Pusuluk, and Özgür E. Müstecaphog`lu. "Quantum Correlations in Jahn-Teller Molecular Systems Simulated with Superconducting Circuits." Journal of Physics: Conference Series 2191, no. 1 (February 1, 2022): 012018. http://dx.doi.org/10.1088/1742-6596/2191/1/012018.

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Abstract We explore quantum correlations, in particular, quantum entanglement, among vibrational phonon modes as well as between electronic and vibrational degrees of freedom in molecular systems, described by Jahn-Teller mechanism. Specifically, to isolate and simplify the phonon- electron interactions in a complex molecular system, the basis of our discussions is taken to be the proposal of simulating two-frequency Jahn- Teller systems using superconducting circuit quantum electrodynamics systems (circuit QED) by Tekin Dereli and co-workers in 2012. We evaluate the quantum correlations, in particular entanglement between the vibrational phonon modes, and present analytical explanations using a single privileged Jahn-Teller mode picture. Furthermore, spin-orbit entanglement or quantum correlations between electronic and vibrational degrees of freedom are examined. We conclude by discussing experimental feasibility to detect such quantum correlations, considering the dephasing and decoherence in state-of-the-art superconducting two-level systems (qubits).

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19

Ding, Cheng-Yun, Li-Na Ji, Tao Chen, and Zheng-Yuan Xue. "Path-optimized nonadiabatic geometric quantum computation on superconducting qubits." Quantum Science and Technology 7, no. 1 (November 22, 2021): 015012. http://dx.doi.org/10.1088/2058-9565/ac3621.

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Abstract Quantum computation based on nonadiabatic geometric phases has attracted a broad range of interests, due to its fast manipulation and inherent noise resistance. However, it is limited to some special evolution paths, and the gate-times are typically longer than conventional dynamical gates, resulting in weakening of robustness and more infidelities of the implemented geometric gates. Here, we propose a path-optimized scheme for geometric quantum computation (GQC) on superconducting transmon qubits, where high-fidelity and robust universal nonadiabatic geometric gates can be implemented, based on conventional experimental setups. Specifically, we find that, by selecting appropriate evolution paths, the constructed geometric gates can be superior to their corresponding dynamical ones under different local errors. Numerical simulations show that the fidelities for single-qubit geometric phase, π/8 and Hadamard gates can be obtained as 99.93%, 99.95% and 99.95%, respectively. Remarkably, the fidelity for two-qubit control-phase gate can be as high as 99.87%. Therefore, our scheme provides a new perspective for GQC, making it more promising in the application of large-scale fault-tolerant quantum computation.

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20

Lima, G., F. A. Torres-Ruiz, Leonardo Neves, A. Delgado, C. Saavedra, and S. Pádua. "Generating mixtures of spatial qubits." Optics Communications 281, no. 19 (October 2008): 5058–62. http://dx.doi.org/10.1016/j.optcom.2008.06.050.

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21

Wernsdorfer, Wolfgang. "Chemistry brings qubits together." Nature Nanotechnology 4, no. 3 (February 8, 2009): 145–46. http://dx.doi.org/10.1038/nnano.2009.21.

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22

Heinrich, Benjamin. "Three qubits in one." Nature Nanotechnology 13, no. 8 (August 2018): 620. http://dx.doi.org/10.1038/s41565-018-0240-x.

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23

Unrau, Waldemar, and Dieter Bimberg. "Flying qubits and entangled photons." Laser & Photonics Reviews 8, no. 2 (August 19, 2013): 276–90. http://dx.doi.org/10.1002/lpor.201300050.

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24

Horoshko, D. B. "Asymmetric Universal Entangling Machine for Qubits." Optics and Spectroscopy 99, no. 3 (2005): 367. http://dx.doi.org/10.1134/1.2055929.

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25

Lapham, Paul, and Vihar P. Georgiev. "Computational study of oxide stoichiometry and variability in the Al/AlOx/Al tunnel junction." Nanotechnology 33, no. 26 (April 7, 2022): 265201. http://dx.doi.org/10.1088/1361-6528/ac5f2e.

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Abstract Aluminium tunnel junctions are key components of a wide variety of electronic devices. These superconducting tunnel junctions, known as Josephson Junctions (JJ’s) are one of the main components of superconducting qubits, a favourite qubit technology in the race for working quantum computers. In this simulation study our JJ configurations are modelled as two aluminium electrodes which are separated by a thin layer of amorphous aluminium oxide. There is limited understanding of how the structure of the amorphous oxide barrier affects the performance and shortcomings of JJ systems. In this paper we present a computational study which combines molecular dynamics, atomistic semi-empirical methods (Density Functional Tight Binding) and non-equilibrium Green’s function to study the electronic structure and current flow of these junction devices. Our results suggest that the atomic nature of the amorphous barrier linked to aluminum-oxygen coordination sensitively affects the current–voltage (IV) characteristics, resistance and critical current. Oxide stoichiometry is an important parameter that can lead to variation in resistance and critical currents of several orders of magnitude. The simulations further illustrate the variability that arises due to small differences in atomic structure across amorphous barriers with the same stoichiometry, density and barrier length. Our results also confirm that the charge transport through the barrier is dominated by metallic conduction pathways.

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26

Dong Kun, 董锟. "Effect of Interaction between Two Qubits on Qubits Entanglement Properties of Ultra-strongly Coupling Quantum Oscillator." Acta Optica Sinica 36, no. 2 (2016): 0227003. http://dx.doi.org/10.3788/aos201636.0227003.

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27

Lao, Lingling, Alexander Korotkov, Zhang Jiang, Wojciech Mruczkiewicz, Thomas E. O'Brien, and Dan E. Browne. "Software mitigation of coherent two-qubit gate errors." Quantum Science and Technology 7, no. 2 (March 15, 2022): 025021. http://dx.doi.org/10.1088/2058-9565/ac57f1.

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Abstract Two-qubit gates are important components of quantum computing. However, unwanted interactions between qubits (so-called parasitic gates) can be particularly problematic and degrade the performance of quantum applications. In this work, we present two software methods to mitigate parasitic two-qubit gate errors. The first approach is built upon the Cartan’s KAK decomposition and keeps the original unitary decomposition for the error-free native two-qubit gate. It counteracts a parasitic two-qubit gate by only applying single-qubit rotations and therefore has no two-qubit gate overhead. We show the optimal choice of single-qubit mitigation gates. The second approach applies a numerical optimisation algorithm to re-compile a target unitary into the error-parasitic two-qubit gate plus single-qubit gates. We demonstrate these approaches on the CPhase-parasitic iSWAP-like gates. The KAK-based approach helps decrease unitary infidelity by a factor of 3 compared to the noisy implementation without error mitigation. When arbitrary single-qubit rotations are allowed, recompilation could completely mitigate the effect of parasitic errors but may require more native gates than the KAK-based approach. We also compare their average gate fidelity under realistic noise models, including relaxation and depolarising errors. Numerical results suggest that different approaches are advantageous in different error regimes, providing error mitigation guidance for near-term quantum computers.

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28

Bertoni, Andrea. "Perspectives on solid-state flying qubits." Journal of Computational Electronics 6, no. 1-3 (December 9, 2006): 67–72. http://dx.doi.org/10.1007/s10825-006-0076-8.

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29

Lavroff, Robert H., Doran L. Pennington, Ash Sueh Hua, Barry Yangtao Li, Jillian A. Williams, and Anastassia N. Alexandrova. "Recent Innovations in Solid-State and Molecular Qubits for Quantum Information Applications." Journal of Physical Chemistry C 125, no. 44 (November 11, 2021): 24285–88. http://dx.doi.org/10.1021/acs.jpcc.1c08530.

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30

Liang, Mai-Lin, Bing Yuan, and Jia-Nan Zhang. "Complete entanglement transfer between light and qubits." Optics Communications 283, no. 1 (January 2010): 203–8. http://dx.doi.org/10.1016/j.optcom.2009.09.063.

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31

Mortezapour, Ali, Ghasem Naeimi, and Rosario Lo Franco. "Coherence and entanglement dynamics of vibrating qubits." Optics Communications 424 (October 2018): 26–31. http://dx.doi.org/10.1016/j.optcom.2018.04.044.

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32

Rosenberg, Eliott, Paul Ginsparg, and Peter L. McMahon. "Experimental error mitigation using linear rescaling for variational quantum eigensolving with up to 20 qubits." Quantum Science and Technology 7, no. 1 (January 1, 2022): 015024. http://dx.doi.org/10.1088/2058-9565/ac3b37.

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Abstract Quantum computers have the potential to help solve a range of physics and chemistry problems, but noise in quantum hardware currently limits our ability to obtain accurate results from the execution of quantum-simulation algorithms. Various methods have been proposed to mitigate the impact of noise on variational algorithms, including several that model the noise as damping expectation values of observables. In this work, we benchmark various methods, including a new method proposed here. We compare their performance in estimating the ground-state energies of several instances of the 1D mixed-field Ising model using the variational-quantum-eigensolver algorithm with up to 20 qubits on two of IBM’s quantum computers. We find that several error-mitigation techniques allow us to recover energies to within 10% of the true values for circuits containing up to about 25 ansatz layers, where each layer consists of CNOT gates between all neighboring qubits and Y-rotations on all qubits.

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33

Cheng, Zhen-Wen, Xiu-Bo Chen, Gang Xu, Yan Chang, Yu Yang, and Yi-Xian Yang. "A secure crossing two qubits protocol based on quantum homomorphic encryption." Quantum Science and Technology 7, no. 2 (March 24, 2022): 025027. http://dx.doi.org/10.1088/2058-9565/ac5acc.

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Abstract In order to solve the information leakage caused by dishonest intermediate nodes in quantum network coding, we apply quantum homomorphic encryption to the butterfly network, and propose a secure protocol for crossing two qubits. Firstly, in the communication process between two senders and the first intermediate node, two senders encrypt their measured particles and send them to the first intermediate node for encoding. If two intermediate nodes are dishonest and know the encryption rules between two senders and two receivers, or there is an external eavesdropper, none of them can recover the transmitted qubits of two senders from the encrypted transmitted particles. In this way, our protocol can transmit two qubits safely and crossly in the butterfly network. Secondly, by analyzing the internal participant attack and the external eavesdropper attack launched by dishonest intermediate nodes and an external eavesdropper respectively, it is confirmed that our protocol is secure. Finally, the experimental simulation results based on the Qiskit framework prove that our protocol is feasible.

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34

Dajka, J., M. Mierzejewski, J. Łuczka, and P. Hänggi. "Dephasing of qubits by the Schrödinger cat." Physica E: Low-dimensional Systems and Nanostructures 42, no. 3 (January 2010): 374–77. http://dx.doi.org/10.1016/j.physe.2009.06.080.

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35

Wang, Yunfei, Jianfeng Li, Shanchao Zhang, Keyu Su, Yiru Zhou, Kaiyu Liao, Shengwang Du, Hui Yan, and Shi-Liang Zhu. "Efficient quantum memory for single-photon polarization qubits." Nature Photonics 13, no. 5 (March 4, 2019): 346–51. http://dx.doi.org/10.1038/s41566-019-0368-8.

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36

Anbaraki, Azam, Davood Afshar, and Mojtaba Jafarpour. "Entangling two separable qubits using an entangled field state." Optik 201 (January 2020): 163539. http://dx.doi.org/10.1016/j.ijleo.2019.163539.

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37

Talebian, E. "A short review note on the qubits and SWAP." Optik 124, no. 20 (October 2013): 4400–4401. http://dx.doi.org/10.1016/j.ijleo.2013.01.027.

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38

Shim, Yun-Pil, and Charles Tahan. "Superconducting-Semiconductor Quantum Devices: From Qubits to Particle Detectors." IEEE Journal of Selected Topics in Quantum Electronics 21, no. 2 (March 2015): 1–9. http://dx.doi.org/10.1109/jstqe.2014.2358208.

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39

Moon, Jong Sung, Haneul Lee, Jin Hee Lee, Woong Bae Jeon, Dowon Lee, Junghyun Lee, Seoyoung Paik, et al. "High-Resolution, High-Contrast Optical Interface for Defect Qubits." ACS Photonics 8, no. 9 (August 19, 2021): 2642–49. http://dx.doi.org/10.1021/acsphotonics.1c00576.

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40

Yuan, Mingyun, Klaus Biermann, and Paulo V. Santos. "Manipulation of flying and single excitons by GHz surface acoustic waves." AVS Quantum Science 4, no. 3 (September 2022): 035901. http://dx.doi.org/10.1116/5.0095152.

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An important prerequisite for quantum communication networks is the transfer and manipulation of single particles on a chip as well as their interconversion to single photons for long-range information exchange. GHz acoustic waves are versatile tools for the implementation of these functionalities in hybrid quantum systems. In particular, flying excitons propelled by GHz surface acoustic waves (SAWs) can potentially satisfy this prerequisite. In this article, we review recent works on the application of GHz SAWs to realize flying excitons in semiconductor-based systems. Most importantly, we have identified suitable two-level centers for the storage of single excitons, thus forming single excitonic qubits, and interconverted them to single photons with a very high emission rate dictated by the GHz-SAW pumping. The work covered here paves the way for on-chip, exciton-based qubit manipulation.

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41

Batle, J., A. R. Plastino, M. Casas, and A. Plastino. "Understanding quantum entanglement: Qubits, rebits and the quaternionic approach." Optics and Spectroscopy 94, no. 5 (May 2003): 700–705. http://dx.doi.org/10.1134/1.1576838.

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42

Nicolas, A., L. Veissier, L. Giner, E. Giacobino, D. Maxein, and J. Laurat. "A quantum memory for orbital angular momentum photonic qubits." Nature Photonics 8, no. 3 (January 26, 2014): 234–38. http://dx.doi.org/10.1038/nphoton.2013.355.

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43

Chakravarthi, Srivatsa, Pengning Chao, Christian Pederson, Sean Molesky, Andrew Ivanov, Karine Hestroffer, Fariba Hatami, Alejandro W. Rodriguez, and Kai-Mei C. Fu. "Inverse-designed photon extractors for optically addressable defect qubits." Optica 7, no. 12 (December 18, 2020): 1805. http://dx.doi.org/10.1364/optica.408611.

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44

Weichselbaum, A., and S. E. Ulloa. "Charge qubits and limitations of electrostatic quantum gates." Physica E: Low-dimensional Systems and Nanostructures 26, no. 1-4 (February 2005): 342–46. http://dx.doi.org/10.1016/j.physe.2004.08.105.

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45

D’Arrigo, A., G. Falci, A. Mastellone, and E. Paladino. "Quantum control of discrete noise in Josephson qubits." Physica E: Low-dimensional Systems and Nanostructures 29, no. 1-2 (October 2005): 297–307. http://dx.doi.org/10.1016/j.physe.2005.05.027.

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46

Leuenberger, Michael N., and Daniel Loss. "Spintronics and quantum computing: switching mechanisms for qubits." Physica E: Low-dimensional Systems and Nanostructures 10, no. 1-3 (May 2001): 452–57. http://dx.doi.org/10.1016/s1386-9477(01)00136-9.

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47

Paladino, E., L. Faoro, A. D'Arrigo, and G. Falci. "Decoherence and 1/f noise in Josephson qubits." Physica E: Low-dimensional Systems and Nanostructures 18, no. 1-3 (May 2003): 29–30. http://dx.doi.org/10.1016/s1386-9477(02)00943-8.

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You, J. Q., J. S. Tsai, and Franco Nori. "Experimentally realizable scalable quantum computing using superconducting qubits." Physica E: Low-dimensional Systems and Nanostructures 18, no. 1-3 (May 2003): 35–36. http://dx.doi.org/10.1016/s1386-9477(02)00946-3.

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Csaba, G., Z. Fahem, F. Peretti, and P. Lugli. "Circuit modeling of flux qubits interacting with superconducting waveguides." Journal of Computational Electronics 6, no. 1-3 (January 18, 2007): 105–8. http://dx.doi.org/10.1007/s10825-006-0067-9.

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Gulka, Michal, Daniel Wirtitsch, Viktor Ivády, Jelle Vodnik, Jaroslav Hruby, Goele Magchiels, Emilie Bourgeois, Adam Gali, Michael Trupke, and Milos Nesladek. "Room-temperature control and electrical readout of individual nitrogen-vacancy nuclear spins." Nature Communications 12, no. 1 (July 20, 2021). http://dx.doi.org/10.1038/s41467-021-24494-x.

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Abstract:

AbstractNuclear spins in semiconductors are leading candidates for future quantum technologies, including quantum computation, communication, and sensing. Nuclear spins in diamond are particularly attractive due to their long coherence time. With the nitrogen-vacancy (NV) centre, such nuclear qubits benefit from an auxiliary electronic qubit, which, at cryogenic temperatures, enables probabilistic entanglement mediated optically by photonic links. Here, we demonstrate a concept of a microelectronic quantum device at ambient conditions using diamond as wide bandgap semiconductor. The basic quantum processor unit – a single 14N nuclear spin coupled to the NV electron – is read photoelectrically and thus operates in a manner compatible with nanoscale electronics. The underlying theory provides the key ingredients for photoelectric quantum gate operations and readout of nuclear qubit registers. This demonstration is, therefore, a step towards diamond quantum devices with a readout area limited by inter-electrode distance rather than by the diffraction limit. Such scalability could enable the development of electronic quantum processors based on the dipolar interaction of spin-qubits placed at nanoscopic proximity.

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