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Coherent Optical Manipulation Of Electron Spin In Charged Semiconductor Quantum Dots
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Book Synopsis Coherent Optical Manipulation of Electron Spin in Charged Semiconductor Quantum Dots by : M. V. Gurudev Dutt
Download or read book Coherent Optical Manipulation of Electron Spin in Charged Semiconductor Quantum Dots written by M. V. Gurudev Dutt and published by . This book was released on 2004 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spins in Optically Active Quantum Dots by : Oliver Gywat
Download or read book Spins in Optically Active Quantum Dots written by Oliver Gywat and published by John Wiley & Sons. This book was released on 2010-02-01 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling a gap in the literature, this up-to-date introduction to the field provides an overview of current experimental techniques, basic theoretical concepts, and sample fabrication methods. Following an introduction, this monograph deals with optically active quantum dots and their integration into electro-optical devices, before looking at the theory of quantum confined states and quantum dots interacting with the radiation field. Final chapters cover spin-spin interaction in quantum dots as well as spin and charge states, showing how to use single spins for break-through quantum computation. A conclusion and outlook round off the volume. The result is a primer providing the essential basic knowledge necessary for young researchers entering the field, as well as semiconductor and theoretical physicists, PhD students in physics and material sciences, electrical engineers and materials scientists.
Book Synopsis Towards Solid-State Quantum Repeaters by : Kristiaan De Greve
Download or read book Towards Solid-State Quantum Repeaters written by Kristiaan De Greve and published by Springer Science & Business Media. This book was released on 2013-04-16 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: Towards Solid-State Quantum Repeaters: Ultrafast, Coherent Optical Control and Spin-Photon Entanglement in Charged InAs Quantum Dots summarizes several state-of-the-art coherent spin manipulation experiments in III-V quantum dots. Both high-fidelity optical manipulation, decoherence due to nuclear spins and the spin coherence extraction are discussed, as is the generation of entanglement between a single spin qubit and a photonic qubit. The experimental results are analyzed and discussed in the context of future quantum technologies, such as quantum repeaters. Single spins in optically active semiconductor host materials have emerged as leading candidates for quantum information processing (QIP). The quantum nature of the spin allows for encoding of stationary, memory quantum bits (qubits), and the relatively weak interaction with the host material preserves the spin coherence. On the other hand, optically active host materials permit direct interfacing with light, which can be used for all-optical qubit manipulation, and for efficiently mapping matter qubits into photonic qubits that are suited for long-distance quantum communication.
Book Synopsis The Coherent Nonlinear Optical Response and Control of Single Quantum Dots by :
Download or read book The Coherent Nonlinear Optical Response and Control of Single Quantum Dots written by and published by . This book was released on 2005 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Work on this program is aimed at developing and understanding nano-optical structures with emphasis on developing quantum optical-based devices. Specific work focused on semiconductor quantum dots. The major achievements include the first demonstration of an all optically driven quantum NOT-gate based on using the exciton-Bloch vector as the qubit (Science 2003). We also demonstrated optical density matrix tomography on this system. Since the fast recombination time of quantum dot excitons may limit these systems for quantum information applications, we initiated experiments on negatively charged quantum dots (similar to ions) where for quantum information processing, the qubit would be the electron spin. The energy level structure in this system is a 3-level A-system, which is also of importance to novel coherent optical applications such as slow light and electromagnetic induced transparency. Our experiments in this system are just beginning, but we have successfully demonstrated optically induced coherence in this system, the unexpected effect of spontaneously generated spin coherence, and coherent optical control. A summary of our work leading up to this was published by invitation in Physics Today while the achievement of the quantum NOT-gate was reviewed in Photonics News.
Book Synopsis Single Semiconductor Quantum Dots by : Peter Michler
Download or read book Single Semiconductor Quantum Dots written by Peter Michler and published by Springer Science & Business Media. This book was released on 2009-06-13 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews recent advances in the field of semiconductor quantum dots via contributions from prominent researchers in the scientific community. Special focus is given to optical, quantum optical, and spin properties of single quantum dots.
Book Synopsis Semiconductor Spintronics and Quantum Computation by : D.D. Awschalom
Download or read book Semiconductor Spintronics and Quantum Computation written by D.D. Awschalom and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past few decades of research and development in solid-state semicon ductor physics and electronics have witnessed a rapid growth in the drive to exploit quantum mechanics in the design and function of semiconductor devices. This has been fueled for instance by the remarkable advances in our ability to fabricate nanostructures such as quantum wells, quantum wires and quantum dots. Despite this contemporary focus on semiconductor "quantum devices," a principal quantum mechanical aspect of the electron - its spin has it accounts for an added quan largely been ignored (except in as much as tum mechanical degeneracy). In recent years, however, a new paradigm of electronics based on the spin degree of freedom of the electron has begun to emerge. This field of semiconductor "spintronics" (spin transport electron ics or spin-based electronics) places electron spin rather than charge at the very center of interest. The underlying basis for this new electronics is the intimate connection between the charge and spin degrees of freedom of the electron via the Pauli principle. A crucial implication of this relationship is that spin effects can often be accessed through the orbital properties of the electron in the solid state. Examples for this are optical measurements of the spin state based on the Faraday effect and spin-dependent transport measure ments such as giant magneto-resistance (GMR). In this manner, information can be encoded in not only the electron's charge but also in its spin state, i. e.
Book Synopsis Optical Generation and Control of Quantum Coherence in Semiconductor Nanostructures by : Gabriela Slavcheva
Download or read book Optical Generation and Control of Quantum Coherence in Semiconductor Nanostructures written by Gabriela Slavcheva and published by Springer Science & Business Media. This book was released on 2010-06-01 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental concept of quantum coherence plays a central role in quantum physics, cutting across disciplines of quantum optics, atomic and condensed matter physics. Quantum coherence represents a universal property of the quantum s- tems that applies both to light and matter thereby tying together materials and p- nomena. Moreover, the optical coherence can be transferred to the medium through the light-matter interactions. Since the early days of quantum mechanics there has been a desire to control dynamics of quantum systems. The generation and c- trol of quantum coherence in matter by optical means, in particular, represents a viable way to achieve this longstanding goal and semiconductor nanostructures are the most promising candidates for controllable quantum systems. Optical generation and control of coherent light-matter states in semiconductor quantum nanostructures is precisely the scope of the present book. Recently, there has been a great deal of interest in the subject of quantum coh- ence. We are currently witnessing parallel growth of activities in different physical systems that are all built around the central concept of manipulation of quantum coherence. The burgeoning activities in solid-state systems, and semiconductors in particular, have been strongly driven by the unprecedented control of coherence that previously has been demonstrated in quantum optics of atoms and molecules, and is now taking advantage of the remarkable advances in semiconductor fabrication technologies. A recent impetus to exploit the coherent quantum phenomena comes from the emergence of the quantum information paradigm.
Book Synopsis Semiconductor Quantum Bits by : Fritz Henneberger
Download or read book Semiconductor Quantum Bits written by Fritz Henneberger and published by CRC Press. This book was released on 2016-04-19 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights state-of-the-art qubit implementations in semiconductors and provides an extensive overview of this newly emerging field. Semiconductor nanostructures have huge potential as future quantum information devices as they provide various ways of qubit implementation (electron spin, electronic excitation) as well as a way to transfer
Book Synopsis Optical Control and Detection of Spin Coherence in Semiconductor Nanostructures by : Jesse A. Berezovsky
Download or read book Optical Control and Detection of Spin Coherence in Semiconductor Nanostructures written by Jesse A. Berezovsky and published by ProQuest. This book was released on 2007 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the coherent dynamics of electron spins in quantum dots (QDs) is important for potential applications in solid-state, spin-based electronics and quantum information processing. Here, results are presented focusing on optical initialization, manipulation, and readout of spin coherence in various semiconductor nanostructures. Layered semiconductor nanocrystals are fabricated containing a spherical "quantum shell" in which electrons and holes are confined. As in a planar quantum well, the quantized energy levels and g-factors are found to depend on the shell thickness. Taking this idea a step further, nanocrystals with a concentric, tunnel-coupled core and shell are investigated. Based on the energy and g-factor dependences in these structures, spins can be selectively initialized into, and read out from, states in the core and shell. In contrast to these two ensemble measurements, we next turn to measurements of single electron spins in single QDs. First, we demonstrate the detection of a single electron spin in a QD using a nondestructive, continuously averaged magneto-optical Kerr rotation (KR) measurement. This continuous single QD KR technique is then extended into the time domain using pulsed pump and probe lasers, allowing the observation of the coherent evolution of an electron spin state with nanosecond temporal resolution. By sweeping the delay between the pump and probe, the dynamics of the spin in the QD are mapped out in time, providing a direct measurement of the electron g-factor and spin lifetime. Finally, this time-resolved single spin measurement is used to observe ultrafast coherent manipulation of the spin in the QD using an off-resonant optical pulse. Via the optical Stark effect, this optical pulse coherently rotates the spin state through angles up to pi radians, on picosecond timescales.
Book Synopsis Spin Physics in Semiconductors by : Mikhail I. Dyakonov
Download or read book Spin Physics in Semiconductors written by Mikhail I. Dyakonov and published by Springer. This book was released on 2017-10-04 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers an extensive introduction to the extremely rich and intriguing field of spin-related phenomena in semiconductors. In this second edition, all chapters have been updated to include the latest experimental and theoretical research. Furthermore, it covers the entire field: bulk semiconductors, two-dimensional semiconductor structures, quantum dots, optical and electric effects, spin-related effects, electron-nuclei spin interactions, Spin Hall effect, spin torques, etc. Thanks to its self-contained style, the book is ideally suited for graduate students and researchers new to the field.
Book Synopsis Spin Electronics by : David D. Awschalom
Download or read book Spin Electronics written by David D. Awschalom and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: The history of scientific research and technological development is replete with examples of breakthroughs that have advanced the frontiers of knowledge, but seldom does it record events that constitute paradigm shifts in broad areas of intellectual pursuit. One notable exception, however, is that of spin electronics (also called spintronics, magnetoelectronics or magnetronics), wherein information is carried by electron spin in addition to, or in place of, electron charge. It is now well established in scientific and engineering communities that Moore's Law, having been an excellent predictor of integrated circuit density and computer performance since the 1970s, now faces great challenges as the scale of electronic devices has been reduced to the level where quantum effects become significant factors in device operation. Electron spin is one such effect that offers the opportunity to continue the gains predicted by Moore's Law, by taking advantage of the confluence of magnetics and semiconductor electronics in the newly emerging discipline of spin electronics. From a fundamental viewpoine, spin-polarization transport in a material occurs when there is an imbalance of spin populations at the Fermi energy. In ferromagnetic metals this imbalance results from a shift in the energy states available to spin-up and spin-down electrons. In practical applications, a ferromagnetic metal may be used as a source of spin-polarized electronics to be injected into a semiconductor, a superconductor or a normal metal, or to tunnel through an insulating barrier.
Book Synopsis Quantum Dots for Quantum Information Technologies by : Peter Michler
Download or read book Quantum Dots for Quantum Information Technologies written by Peter Michler and published by Springer. This book was released on 2017-06-01 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the most recent developments in quantum dot spin physics and the generation of deterministic superior non-classical light states with quantum dots. In particular, it addresses single quantum dot spin manipulation, spin-photon entanglement and the generation of single-photon and entangled photon pair states with nearly ideal properties. The role of semiconductor microcavities, nanophotonic interfaces as well as quantum photonic integrated circuits is emphasized. The latest theoretical and experimental studies of phonon-dressed light matter interaction, single-dot lasing and resonance fluorescence in QD cavity systems are also provided. The book is written by the leading experts in the field.
Book Synopsis Optical Manipulation of Electron Spins Bound to Neutral Donors in GaAs by : Kai-Mei C. Fu
Download or read book Optical Manipulation of Electron Spins Bound to Neutral Donors in GaAs written by Kai-Mei C. Fu and published by . This book was released on 2007 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Lasers and Electro Optics by : Nelson Costa
Download or read book Advances in Lasers and Electro Optics written by Nelson Costa and published by BoD – Books on Demand. This book was released on 2010-04-01 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lasers and electro-optics is a field of research leading to constant breakthroughs. Indeed, tremendous advances have occurred in optical components and systems since the invention of laser in the late 50s, with applications in almost every imaginable field of science including control, astronomy, medicine, communications, measurements, etc. If we focus on lasers, for example, we find applications in quite different areas. We find lasers, for instance, in industry, emitting power level of several tens of kilowatts for welding and cutting; in medical applications, emitting power levels from few milliwatt to tens of Watt for various types of surgeries; and in optical fibre telecommunication systems, emitting power levels of the order of one milliwatt. This book is divided in four sections. The book presents several physical effects and properties of materials used in lasers and electro-optics in the first chapter and, in the three remaining chapters, applications of lasers and electro-optics in three different areas are presented
Book Synopsis Optical Manipulation of Quantum Dot Spin Qubits with Exciton-polariton Resonance by : Shruti Puri
Download or read book Optical Manipulation of Quantum Dot Spin Qubits with Exciton-polariton Resonance written by Shruti Puri and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments to manipulate a handful of quantum bits, based on a variety of underlying physical mechanisms, have been demonstrated. The ultimate goal is to build large systems consisting of billions of qubits and implement fast qubit operations with adequate accuracy, for solving problems that are intractable on classical computers (like factoring large numbers and quantum simulations). We develop and analyze a hardware platform for a scalable quantum computer based on semiconductor quantum dot (QD) electron spin qubits and their interaction with microcavity quantum well (QW) exciton-polaritons. This approach is based on the framework of previously proposed QuDOS architecture for surface code quantum computation. Despite the developments in techniques for implementing quantum non-demolition (QND) measurement and nearest-neighbor gates in QD spin systems, achieving the resource requirements for fault-tolerance still remains a challenge. In order to overcome this, our scheme relies on the indirect optical control of QD spins, resulting from the long-ranged Coulomb exchange interaction between the spin qubits and optically excited, spin-polarized, QW exciton-polaritons. The strength of this scheme is twofold. Firstly, by a careful design of the QW and QD it is possible to separate the optical eld from the QD manifold, thus preventing any unwanted backaction during a measurement event. Secondly, the bosonic nature of polaritons and their weak interaction with the solid-state environment allows the injection of numerous polaritons coherently in a single mode, increasing the nonlinearity in the qubit-polariton coupling, crucial for two-qubit operation. We develop schemes for implementing fast, high- delity, single qubit gate, two-qubit geometric phase gate and single-shot QND measurement. Furthermore, we investigate several issues critical for the robustness of the gate operations such as decoherence mechanisms, polariton-polariton interaction, phonon scattering etc.
Book Synopsis Handbook of Nanoscience, Engineering, and Technology by : William A. Goddard III
Download or read book Handbook of Nanoscience, Engineering, and Technology written by William A. Goddard III and published by CRC Press. This book was released on 2002-10-29 with total page 830 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanotechnology, science, and engineering spearhead the 21st century revolution that is leading to fundamental breakthroughs in the way materials, devices, and systems are understood, designed, made, and used. With contributions from a host of world-class experts and pioneers in the field, this handbook sets forth the fundamentals of nanoelectromechanical systems (NEMS), studies their fabrication, and explores some of their most promising applications. It provides comprehensive information and references for nanoscale structures, devices, and systems, molecular technology and nanoelectromechanical theory, and promises to become a standard reference for the field.
Book Synopsis Semiconductor Quantum Science and Technology by :
Download or read book Semiconductor Quantum Science and Technology written by and published by Academic Press. This book was released on 2020-11-28 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductor quantum science and technology is exploring the exciting and emerging prospects of integrating quantum functionality on semiconductor platforms to convert current information technology into quantum information technology. The past twenty years have led to incredible advances in this field. This book brings together the leading scientists who present the main achievements and challenges by reviewing and motivating the state-of-the-art at a tutorial level. The key challenges include creating quantum-light sources, quantum information processing via strong light-matter interaction, discovering new quantum materials as well as quasiparticles, and determining new quantum spectroscopic methodologies for superior control of quantum phenomena. As an important step, integration of these solutions on a semiconductor chip is discussed, and outlook for the future of semiconductor quantum science and technology is given. Leading experts present their vision on semiconductor quantum science and technology All aspects needed to realize semiconductor quantum science and technology are explained Quantum semiconductors from overviewed a tutorial introduction to the state-of-the-art
