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Articoli di riviste sul tema "Quantum electronics"

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Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 4 marzo 2023

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1

Mukhammadova, Dilafruz Ahmadovna. "The Role Of Quantum Electronics In Alternative Energy". American Journal of Applied sciences 03, n. 01 (30 gennaio 2021): 69–78. http://dx.doi.org/10.37547/tajas/volume03issue01-12.

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The article deals with Quantum electronics, as a field of physics that studies methods of amplification and generation of electromagnetic radiation based on the phenomenon of stimulated radiation in nonequilibrium quantum systems, as well as the properties of amplifiers and generators obtained in this way and their application, a description of the structure of the most important lasers is given, physical foundations of quantum electronics, which are reduced primarily to the application of Einstein's theory of radiation to thermodynamically nonequilibrium systems with discrete energy levels. The article is intended for undergraduates of the Department of Physics, Radio Engineering, who have interests in the field of research and applications of laser radiation, and is aimed at giving them the minimum necessary for that initial information on quantum electronics.

2

Weinbub, Josef, e Robert Kosik. "Computational perspective on recent advances in quantum electronics: from electron quantum optics to nanoelectronic devices and systems". Journal of Physics: Condensed Matter 34, n. 16 (22 febbraio 2022): 163001. http://dx.doi.org/10.1088/1361-648x/ac49c6.

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Abstract Quantum electronics has significantly evolved over the last decades. Where initially the clear focus was on light–matter interactions, nowadays approaches based on the electron’s wave nature have solidified themselves as additional focus areas. This development is largely driven by continuous advances in electron quantum optics, electron based quantum information processing, electronic materials, and nanoelectronic devices and systems. The pace of research in all of these areas is astonishing and is accompanied by substantial theoretical and experimental advancements. What is particularly exciting is the fact that the computational methods, together with broadly available large-scale computing resources, have matured to such a degree so as to be essential enabling technologies themselves. These methods allow to predict, analyze, and design not only individual physical processes but also entire devices and systems, which would otherwise be very challenging or sometimes even out of reach with conventional experimental capabilities. This review is thus a testament to the increasingly towering importance of computational methods for advancing the expanding field of quantum electronics. To that end, computational aspects of a representative selection of recent research in quantum electronics are highlighted where a major focus is on the electron’s wave nature. By categorizing the research into concrete technological applications, researchers and engineers will be able to use this review as a source for inspiration regarding problem-specific computational methods.

3

Zwanenburg, Floris A., Andrew S. Dzurak, Andrea Morello, Michelle Y. Simmons, Lloyd C. L. Hollenberg, Gerhard Klimeck, Sven Rogge, Susan N. Coppersmith e Mark A. Eriksson. "Silicon quantum electronics". Reviews of Modern Physics 85, n. 3 (10 luglio 2013): 961–1019. http://dx.doi.org/10.1103/revmodphys.85.961.

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4

SAKAKI, H. "Quantum Microstructures and Quantum Wave Electronics." Nihon Kessho Gakkaishi 33, n. 3 (1991): 107–18. http://dx.doi.org/10.5940/jcrsj.33.107.

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5

Guo, Cheng, Jin Lin, Lian-Chen Han, Na Li, Li-Hua Sun, Fu-Tian Liang, Dong-Dong Li et al. "Low-latency readout electronics for dynamic superconducting quantum computing". AIP Advances 12, n. 4 (1 aprile 2022): 045024. http://dx.doi.org/10.1063/5.0088879.

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Dynamic quantum computing can support quantum error correction circuits to build a large general-purpose quantum computer, which requires electronic instruments to perform the closed-loop operation of readout, processing, and control within 1% of the qubit coherence time. In this paper, we present low-latency readout electronics for dynamic superconducting quantum computing. The readout electronics use a low-latency analog-to-digital converter to capture analog signals, a field-programmable gate array (FPGA) to process digital signals, and the general I/O resources of the FPGA to forward the readout results. Running an algorithm based on the design of multichannel parallelism and single instruction multiple data on an FPGA, the readout electronics achieve a readout latency of 40 ns from the last sample input to the readout valid output. The feedback data link for cross-instrument communication shows a communication latency of 48 ns when 16 bits of data are transmitted over a 2 m-length cable using a homologous clock to drive the transceiver. With codeword-based triggering mechanisms, readout electronics can be used in dynamic superconducting quantum computing.

6

Liu, Mengxia, Nuri Yazdani, Maksym Yarema, Maximilian Jansen, Vanessa Wood e Edward H. Sargent. "Colloidal quantum dot electronics". Nature Electronics 4, n. 8 (agosto 2021): 548–58. http://dx.doi.org/10.1038/s41928-021-00632-7.

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7

Taichenachev, Alexey V. "Department of Quantum Electronics". Siberian Journal of Physics 1, n. 1 (2006): 83–84. http://dx.doi.org/10.54238/1818-7994-2006-1-1-83-84.

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8

Sinclair, B. D. "Lasers and quantum electronics". Physics Bulletin 37, n. 10 (ottobre 1986): 412. http://dx.doi.org/10.1088/0031-9112/37/10/013.

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9

Dragoman, M., e D. Dragoman. "Graphene-based quantum electronics". Progress in Quantum Electronics 33, n. 6 (novembre 2009): 165–214. http://dx.doi.org/10.1016/j.pquantelec.2009.08.001.

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10

Rost, Jan-Michael. "Tubes for quantum electronics". Nature Photonics 4, n. 2 (febbraio 2010): 74–75. http://dx.doi.org/10.1038/nphoton.2009.279.

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11

Miller, A., e I. White. "Optical and quantum electronics". Optical and Quantum Electronics 34, n. 5-6 (maggio 2002): 621–26. http://dx.doi.org/10.1007/bf02892621.

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12

Zapol'skiĭ, A. K. "News in quantum electronics". Soviet Journal of Quantum Electronics 22, n. 9 (30 settembre 1992): 873–74. http://dx.doi.org/10.1070/qe1992v022n09abeh003621.

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13

Hinken, J. H., V. Kose, Harold Weinstock, Martin Nisenoff e Robert L. Fagaly. "Superconductor Electronics: Fundamentals and Microwave Applications; Superconducting Quantum Electronics; Superconducting Electronics". Physics Today 44, n. 2 (febbraio 1991): 92–94. http://dx.doi.org/10.1063/1.2809995.

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14

Tang, Haijun, Irfan Ahmed, Pargorn Puttapirat, Tianhao Wu, Yuwei lan, Yanpeng Zhang e Enling Li. "Investigation of multi-bunching by generating multi-order fluorescence of NV center in diamond". Physical Chemistry Chemical Physics 20, n. 8 (2018): 5721–25. http://dx.doi.org/10.1039/c7cp08005k.

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15

Tamulis, Arvydas, Vykintas Tamulis e Aiste Ziriakoviene. "Quantum Mechanical Design of Molecular Computers Elements Suitable for Self-Assembling to Quantum Computing Living Systems". Solid State Phenomena 97-98 (aprile 2004): 173–80. http://dx.doi.org/10.4028/www.scientific.net/ssp.97-98.173.

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There are presented logic gates of molecular electronics digital computers. Maximal length of these molecular electronics digital logic gates are no more than four nanometers and maximal width 2.5 nm. The results of light induced internal molecular motions in azo-dyes molecules have been used for the design of light driven logically controlled (OR, AND) molecular machines composed from organic photoactive electron donor dithieno[3,2-b:2',3'-d]thiophene and ferrocene molecules, electron accepting tetracyano-indane molecule, and moving azo-benzene molecular fragment. Density functional theory (DFT) B3PW91/6-311G model calculations were performed for the geometry optimization of these molecular electronics logical gates. Applied DFT time dependent (DFT-TD/B3PW91) method and our visualization program give absorption spectra of designed molecular gates and show from which fragments electrons are hopping in various excited states. Quantum mechanical investigations of proton Nuclear Magnetic Resonance (NMR) values of Cu, Co, Zn, Mn and Fe biliverdin derivatives and their dimers using ab initio Hartree-Fock (HF) and DFT methods indicate that these modified derivatives should generate from one to twelve Quantum Bits (QuBits). The chemical shifts are obtained as the difference of the values of the tetramethylsilane (Si(CH3)4) molecule Gauge-Independent Atomic Orbital (GIAO) nuclear magnetic shielding tensor on the hydrogen atoms and that of the magnetically active molecules. There are designed several single supermolecule and supramolecular devices containing molecular electronics digital logic gates, photoactive molecular machines and elements of molecular NMR quantum computers that allowed to design several supramolecular Control NOT NMR quantum computing gates. Self-assembling simulations of these molecular quantum computing gates induced idea of self-assembled molecular quantum supercomputer and molecular quantum computing life.

16

Wang, Haomin, Hui Shan Wang, Chuanxu Ma, Lingxiu Chen, Chengxin Jiang, Chen Chen, Xiaoming Xie, An-Ping Li e Xinran Wang. "Graphene nanoribbons for quantum electronics". Nature Reviews Physics 3, n. 12 (28 settembre 2021): 791–802. http://dx.doi.org/10.1038/s42254-021-00370-x.

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17

Devoret, Michel. "New era for quantum electronics". Physics World 14, n. 6 (giugno 2001): 27–28. http://dx.doi.org/10.1088/2058-7058/14/6/25.

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18

Boyd, Robert W., Michael G. Raymer e Alexander A. Manenkov. "Fifty years of quantum electronics". Journal of Modern Optics 52, n. 12 (15 agosto 2005): 1635. http://dx.doi.org/10.1080/09500340500164856.

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19

Townes *, Charles H. "Early history of quantum electronics". Journal of Modern Optics 52, n. 12 (15 agosto 2005): 1637–45. http://dx.doi.org/10.1080/09500340500164930.

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20

Knight, Peter L. "Thirteenth National Quantum Electronics Conference". Journal of Modern Optics 45, n. 6 (1 giugno 1998): 1097. http://dx.doi.org/10.1080/095003498151221.

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21

Schubert, Max, Bernd Wilhelmi e Lorenzo M. Narducci. "Nonlinear Optics and Quantum Electronics". Physics Today 41, n. 2 (febbraio 1988): 80–82. http://dx.doi.org/10.1063/1.2811321.

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22

Teich, M. C., e B. E. A. Saleh. "Branching processes in quantum electronics". IEEE Journal of Selected Topics in Quantum Electronics 6, n. 6 (novembre 2000): 1450–57. http://dx.doi.org/10.1109/2944.902200.

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23

Ke, San-Huang, Weitao Yang e Harold U. Baranger. "Quantum-Interference-Controlled Molecular Electronics". Nano Letters 8, n. 10 (8 ottobre 2008): 3257–61. http://dx.doi.org/10.1021/nl8016175.

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24

Barnett, S. M. "Nonlinear optics and quantum electronics". Optics & Laser Technology 19, n. 4 (agosto 1987): 218–20. http://dx.doi.org/10.1016/0030-3992(87)90074-0.

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25

Knight, Peter. "Nonlinear Optics and Quantum Electronics". Journal of Modern Optics 34, n. 4 (aprile 1987): 482. http://dx.doi.org/10.1080/09500348714550481.

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26

Ducloy, M. "1996 EPS Quantum Electronics Prize". Europhysics News 26, n. 6 (1995): 135. http://dx.doi.org/10.1051/epn/19952606135b.

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27

Sohn, Lydia L. "A quantum leap for electronics". Nature 394, n. 6689 (luglio 1998): 131–32. http://dx.doi.org/10.1038/28058.

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28

Cuoco, M., e A. Di Bernardo. "Materials challenges for SrRuO₃: From conventional to quantum electronics". APL Materials 10, n. 9 (1 settembre 2022): 090902. http://dx.doi.org/10.1063/5.0100912.

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Abstract (sommario):

The need for faster and more miniaturized electronics is challenging scientists to develop novel forms of electronics based on quantum degrees of freedom different from electron charge. In this fast-developing field, often referred to as quantum electronics, the metal-oxide perovskite SrRuO3 can play an important role thanks to its diverse physical properties, which have been intensively investigated, mostly for conventional electronics. In addition to being chemically stable, easy to fabricate with high quality and to grow epitaxially onto many oxides—these are all desirable properties also for conventional electronics—SrRuO3 has interesting properties for quantum electronics like itinerant ferromagnetism and metallic behavior, strong correlation between magnetic anisotropy and spin–orbit coupling, strain-tunable magnetization, and anomalous Hall and Berry effects. In this Perspective, after describing the main phenomena emerging from the interplay between spin, orbital, lattice, and topological quantum degrees of freedom in SrRuO3, we discuss the challenges still open to achieve control over these phenomena. We then provide our perspectives on the most promising applications of SrRuO3 for devices for conventional and quantum electronics. We suggest new device configurations and discuss the materials challenges for their realization. For conventional electronics, we single out applications where SrRuO3 devices can bring competitive advantages over existing ones. For quantum electronics, we propose devices that can help gain a deeper understanding of quantum effects in SrRuO3 to exploit them for quantum technologies. We finally give an outlook about properties of SrRuO3 still waiting for discovery and applications that may stem from them.

29

Aseev, Aleksander Leonidovich, Alexander Vasilevich Latyshev e Anatoliy Vasilevich Dvurechenskii. "Semiconductor Nanostructures for Modern Electronics". Solid State Phenomena 310 (settembre 2020): 65–80. http://dx.doi.org/10.4028/www.scientific.net/ssp.310.65.

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Modern electronics is based on semiconductor nanostructures in practically all main parts: from microprocessor circuits and memory elements to high frequency and light-emitting devices, sensors and photovoltaic cells. Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) with ultimately low gate length in the order of tens of nanometers and less is nowadays one of the basic elements of microprocessors and modern electron memory chips. Principally new physical peculiarities of semiconductor nanostructures are related to quantum effects like tunneling of charge carriers, controlled changing of energy band structure, quantization of energy spectrum of a charge carrier and a pronounced spin-related phenomena. Superposition of quantum states and formation of entangled states of photons offers new opportunities for the realization of quantum bits, development of nanoscale systems for quantum cryptography and quantum computing. Advanced growth techniques such as molecular beam epitaxy and chemical vapour epitaxy, atomic layer deposition as well as optical, electron and probe nanolithography for nanostructure fabrication have been widely used. Nanostructure characterization is performed using nanometer resolution tools including high-resolution, reflection and scanning electron microscopy as well as scanning tunneling and atomic force microscopy. Quantum properties of semiconductor nanostructures have been evaluated from precise electrical and optical measurements. Modern concepts of various semiconductor devices in electronics and photonics including single-photon emitters, memory elements, photodetectors and highly sensitive biosensors are developed very intensively. The perspectives of nanostructured materials for the creation of a new generation of universal memory and neuromorphic computing elements are under lively discussion. This paper is devoted to a brief description of current achievements in the investigation and modeling of single-electron and single-photon phenomena in semiconductor nanostructures, as well as in the fabrication of a new generation of elements for micro-, nano, optoelectronics and quantum devices.

30

Schmid, Christoph P., Fabian Langer, Stefan Schlauderer, Martin Gmitra, Jaroslav Fabian, Philipp Nagler, Christian Schuller et al. "Lightwave control of the valley pseudospin in a monolayer of tungsten diselenide". EPJ Web of Conferences 205 (2019): 05011. http://dx.doi.org/10.1051/epjconf/201920505011.

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As conventional electronic is approaching its ultimate limits, tremendous efforts have been taken to explore novel concepts of ultrafast quantum control. Lightwave electronics - the foundation of attosecond science - has opened a spectacular perspective by utilizing the oscillating carrier wave of an intense light pulse to control the translational motion of the electron’s charge faster than a single cycle of light [1-7]. Despite their promising potential as future information carriers [8,10], the internal quantum attributes such as spins and valley pseudospins have not been switchable at optical clock rates. Here we demonstrate a novel subcycle control scheme of the electron’s pseudospin in a monolayer of tungsten diselenide using strong mid-infrared lightwaves [9]. Our work opens the door towards systematic valleytronic protocols at optical clock rates.

31

Siu, Timothy C., Joshua Y. Wong, Matthew O. Hight e Timothy A. Su. "Single-cluster electronics". Physical Chemistry Chemical Physics 23, n. 16 (2021): 9643–59. http://dx.doi.org/10.1039/d1cp00809a.

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This article reviews the scope of inorganic cluster compounds measured in single-molecule junctions. The article explores how the structure and bonding of inorganic clusters give rise to specific quantum transport phenomena in molecular junctions.

32

HARRIS, J. S. "FROM BLOCH FUNCTIONS TO QUANTUM WELLS". International Journal of Modern Physics B 04, n. 06 (maggio 1990): 1149–79. http://dx.doi.org/10.1142/s0217979290000577.

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The early foundations for the electronics revolution were set in Professor Felix Bloch’s Ph. D. dissertation. The fundamental insights of this work are reviewed in light of both their impact on modern electronics, and particularly, their relevance for today’s quantum well engineered devices, and their potential to be tomorrow’s electronics foundation.

33

Northrop, D. C. "Book Review: Quantum Electronics (3rd Ed.)". International Journal of Electrical Engineering & Education 27, n. 1 (gennaio 1990): 12. http://dx.doi.org/10.1177/002072099002700102.

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34

Krokhin, Oleg N. "The early years of quantum electronics". Physics-Uspekhi 47, n. 10 (31 ottobre 2004): 1045–48. http://dx.doi.org/10.1070/pu2004v047n10abeh001907.

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35

Seideman, Tamar. "Current-driven dynamics in quantum electronics". Journal of Modern Optics 50, n. 15-17 (ottobre 2003): 2393–410. http://dx.doi.org/10.1080/09500340308233571.

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36

Manenkov, A. A. "EPR and development of quantum electronics". Journal of Physics: Conference Series 324 (21 ottobre 2011): 012001. http://dx.doi.org/10.1088/1742-6596/324/1/012001.

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37

Krokhin, Oleg N. "The early years of quantum electronics". Uspekhi Fizicheskih Nauk 174, n. 10 (2004): 1117. http://dx.doi.org/10.3367/ufnr.0174.200410h.1117.

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38

Nimtz, Gu¨nter, e Winfried Heitmann. "Superluminal photonic tunneling and quantum electronics". Progress in Quantum Electronics 21, n. 2 (gennaio 1997): 81–108. http://dx.doi.org/10.1016/s0079-6727(97)84686-1.

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39

Yokoyama, N., S. Muto, K. Imamura, M. Takatsu, T. Mori, Y. Sugiyama, Y. Sakuma, H. Nakao e T. Adachihara. "Quantum functional devices for advanced electronics". Solid-State Electronics 40, n. 1-8 (gennaio 1996): 505–11. http://dx.doi.org/10.1016/0038-1101(95)00279-0.

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40

Grimes, Dale M. "Quantum theory and classical, nonlinear electronics". Physica D: Nonlinear Phenomena 20, n. 2-3 (giugno 1986): 285–302. http://dx.doi.org/10.1016/0167-2789(86)90034-5.

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41

Woerdman, J. P. "EQEC: 2nd European Quantum Electronics Conference". Europhysics News 20, n. 11-12 (1989): 170. http://dx.doi.org/10.1051/epn/19892011170.

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42

Zapol'skiĭ, A. K. "What is new in quantum electronics?" Soviet Journal of Quantum Electronics 22, n. 7 (31 luglio 1992): 675–76. http://dx.doi.org/10.1070/qe1992v022n07abeh003569.

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43

CITRIN, D. S. "INTERBAND OPTICAL PROPERTIES OF QUANTUM WIRES: THEORY AND APPLICATION". Journal of Nonlinear Optical Physics & Materials 04, n. 01 (gennaio 1995): 83–98. http://dx.doi.org/10.1142/s0218863595000057.

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The electronic states near the fundamental gap largely determine the most commonly investigated linear and nonlinear optical properties of quantum wires. We first discuss heavy-hole-light-hole band-mixing effects and illustrate the consequences with an application in opto-electronics, namely a quantum-wire-array based polarization modulator. Next, an overview of polariton effects which determine the time scale for excitonic radiative decay is given and comparison with recent experiments made.

44

Hamham, Soufiyan, Abdelouahed Cherqaoui, Said Belaaouad e Youssef Naimi. "Organic Semiconductivity and Photovoltaism: Concepts and applications". Mediterranean Journal of Chemistry 9, n. 1 (30 agosto 2019): 65–77. http://dx.doi.org/10.13171/mjc91190820600sh.

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This work has for the objective, the theoretical explanation of the semi-conduction mechanisms as well as the photovoltaism in molecular organic materials by the creation of excitons and the transfer of Ï€ electrons of a donor (P3HT) to an acceptor (PCBM). In focusing on the broad technological applications of the molecular optoelectronic phenomena, this will provide the capital importance of the molecular electronic as a scientific and technical revolution which extends from the energy, has medicine up to the areas confusing nanotechnology and quantum electronics.

45

Zhang, Lifu, Ruihao Ni e You Zhou. "Controlling quantum phases of electrons and excitons in moiré superlattices". Journal of Applied Physics 133, n. 8 (28 febbraio 2023): 080901. http://dx.doi.org/10.1063/5.0139179.

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Moiré lattices formed in twisted and lattice-mismatched van der Waals heterostructures have emerged as a platform to engineer the novel electronic and excitonic states at the nanoscale. This Perspective reviews the materials science of moiré heterostructures with a focus on the structural properties of the interface and its structural–property relationships. We first review the studies of the atomic relaxation and domain structures in moiré superlattices and how these structural studies provide critical insights into understanding the behaviors of quantum-confined electrons and excitons. We discuss the general frameworks to manipulate moiré structures and how such control can be harnessed for engineering new phases of matter and simulating various quantum phenomena. Finally, we discuss routes toward large-scale moiré heterostructures and give an outlook on their applications in quantum electronics and optoelectronics. Special emphasis will be placed on the challenges and opportunities of the reliable fabrication and dynamical manipulation of moiré heterostructures.

46

Kausar, Ayesha. "Polyaniline and quantum dot-based nanostructures: Developments and perspectives". Journal of Plastic Film & Sheeting 36, n. 4 (14 maggio 2020): 430–47. http://dx.doi.org/10.1177/8756087920926649.

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Quantum dots are 2–5 nm nanoparticles with exceptional optical, electronic, luminescence, and semiconducting properties. Polyaniline is an exclusive conjugated polymer. This article reviews recent efforts, scientific trials, and technological solicitations of the polyaniline/quantum dot-based nanocomposites. Polyaniline/quantum dot mixtures form a unique composition for advance materials and applications. Carbon dots, graphene quantum dots, and several inorganic quantum dots have been added to a conducting polymer. A functional quantum dot may develop electrostatic, van der Waal, and π–π stacking interactions with the conjugated polymer backbone. Uniform quantum dot dispersion in polyaniline may result in inimitable morphology, electrical conductivity, electrochemical properties, capacitance, and sensing features. Finally, this review expounds on the many applications for polyaniline/quantum dot nanocomposites including dye-sensitized solar cell, supercapacitor, electronics, gas sensor, biosensor, and bioimaging.

47

Kabel, Jeff, Sambhawana Sharma, Amit Acharya, Dongyan Zhang e Yoke Khin Yap. "Molybdenum Disulfide Quantum Dots: Properties, Synthesis, and Applications". C 7, n. 2 (8 maggio 2021): 45. http://dx.doi.org/10.3390/c7020045.

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Molybdenum disulfide quantum dots (MoS2 QDs) are a unique class of zero-dimensional (0D) van der Waals nanostructures. MoS2 QDs have attracted significant attention due to their unique optical, electronic, chemical, and biological properties due to the presence of edge states of these van der Waals QDs for various chemical functionalization. Their novel properties have enabled applications in many fields, including advanced electronics, electrocatalysis, and biomedicine. In this review, the various synthesis techniques, the novel properties, and the wide applications of MoS2 quantum dots are discussed in detail.

48

Hill, Charles D., Eldad Peretz, Samuel J. Hile, Matthew G. House, Martin Fuechsle, Sven Rogge, Michelle Y. Simmons e Lloyd C. L. Hollenberg. "A surface code quantum computer in silicon". Science Advances 1, n. 9 (ottobre 2015): e1500707. http://dx.doi.org/10.1126/sciadv.1500707.

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The exceptionally long quantum coherence times of phosphorus donor nuclear spin qubits in silicon, coupled with the proven scalability of silicon-based nano-electronics, make them attractive candidates for large-scale quantum computing. However, the high threshold of topological quantum error correction can only be captured in a two-dimensional array of qubits operating synchronously and in parallel—posing formidable fabrication and control challenges. We present an architecture that addresses these problems through a novel shared-control paradigm that is particularly suited to the natural uniformity of the phosphorus donor nuclear spin qubit states and electronic confinement. The architecture comprises a two-dimensional lattice of donor qubits sandwiched between two vertically separated control layers forming a mutually perpendicular crisscross gate array. Shared-control lines facilitate loading/unloading of single electrons to specific donors, thereby activating multiple qubits in parallel across the array on which the required operations for surface code quantum error correction are carried out by global spin control. The complexities of independent qubit control, wave function engineering, and ad hoc quantum interconnects are explicitly avoided. With many of the basic elements of fabrication and control based on demonstrated techniques and with simulated quantum operation below the surface code error threshold, the architecture represents a new pathway for large-scale quantum information processing in silicon and potentially in other qubit systems where uniformity can be exploited.

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TAVKHELIDZE, AVTO, e VASIKO SVANIDZE. "QUANTUM STATE DEPRESSION IN A SEMICONDUCTOR QUANTUM WELL". International Journal of Nanoscience 07, n. 06 (dicembre 2008): 333–38. http://dx.doi.org/10.1142/s0219581x0800550x.

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In this study, the quantum state depression (QSD) in a semiconductor quantum well (QW) is investigated. The QSD emerges from the ridged geometry of the QW boundary. Ridges impose additional boundary conditions on the electron wave function, and some quantum states become forbidden. State density is reduced in all energy bands, including the conduction band (CB). Hence, electrons, rejected from the filled bands, must occupy quantum states in the empty bands due to the Pauli exclusion principle. Both the electron concentration in the CB and the Fermi energy increased, as in the case of donor doping. Since quantum state density is reduced, the ridged quantum well (RQW) exhibits quantum properties at widths approaching 200 nm. A wide RQW can be used to improve photon confinement in QW-based optoelectronic devices. Reduction in the state density increases the carrier mobility and makes the ballistic transport regime more pronounced in the semiconductor QW devices. Furthermore, the QSD doping does not introduce scattering centers and can be used for power electronics.

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FU, Y., S. HELLSTRÖM e H. ÅGREN. "NONLINEAR OPTICAL PROPERTIES OF QUANTUM DOTS: EXCITONS IN NANOSTRUCTURES". Journal of Nonlinear Optical Physics & Materials 18, n. 02 (giugno 2009): 195–226. http://dx.doi.org/10.1142/s0218863509004579.

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We review the concepts of excitons and excitonic polaritons, their nonlinear optical properties in nanostructures and their applications within integrated electronics and optoelectronics. Various theoretical aspects of excitons and excitonic polaritons are introduced, followed by a summary of their experimental and application-specific development in nanostructures at the electronic and photonic engineering levels. A number of technical applications are highlighted.