Download or read book Decoherence of Spatially Separated Quantum Bits written by Roland Doll and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Decoherence of Spatially Separated Quantum Bits written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This work investigates the decoherence of a qubit register caused by spatially correlated quantum noise and develops theoretical tools to describe the associated reduced qubit dynamics. The environment that causes decoherence of the qubit states is modeled as a bosonic field. The non-local qubit-field coupling explicitly takes effects from a finite propagation time of field distortions between separated qubits into account. A natural realization of this model is the coupling of quantum dot spin and charge qubits to phonons of the underlying substrate. One part of the work concentrates on the case where the bath fluctuations induce pure dephasing of the qubit states. For this problem the reduced qubit dynamics possesses an exact solution which is presented in explicit form. A main focus is put on (i) the short-time dynamics of a single qubit which in the standard description with exponential decay rates shows up as a reduced initial amplitude of coherent qubit oscillations, and (ii) the consequences of a spatial qubit separation of several qubits for bipartite qubit entanglement and the register fidelity. In a second part it is shown that a direct application of the Bloch-Redfield theory to a spatially extended system of qubits leads to a violation of causality and predicts spurious decoherence-free subspaces. We reveal why this approach fails and derive a non-Markovian causal master equation that captures the main effects of the spatial separation. Compared to general non-Markovian master equations, the causal master equation has the advantage of being more intuitive and of allowing for algebraic methods, e.g. within a symmetry analysis. Finally, using the causal master equation approach the decoherence of two spatially separated qubits subject to bit-flip noise is studied. We investigate how spatial noise correlations influence the relaxation of entangled solid-state qubits. It is shown that by collective exchange of bosons via a thermal one-dimensional environment.
Download or read book Decoherence and Its Implications in Quantum Computation and Information Transfer written by Tony Gonis and published by IOS Press. This book was released on 2001 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decoherence is the physical process by which the classical world - the world of common sense - emerges from its quantum underpinnings. This physical process refers to the loss of phase coherence between the parts of a quantum system, because of the interaction of the system with the environment.
Download or read book Frontiers in Quantum Information Research written by Mikio Nakahara and published by World Scientific. This book was released on 2012 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Foundations of Quantum Mechanics written by Claudio Garola and published by World Scientific. This book was released on 2000 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a sample of the present research on the foundations of quantum mechanics and related topics by collecting the papers of the Italian scholars who attended the conference entitled ?The Foundations of Quantum Mechanics ? Historical Analysis and Open Questions? (Lecce, 1998). The perspective of the book is interdisciplinary, and hence philosophical, historical and technical papers are gathered together so as to allow the reader to compare different viewpoints and cultural approaches. Most of the papers confront, directly or indirectly, the objectivity problem, taking into account the positions of the founders of QM or more recent developments. More specifically, the technical papers in the book pay special attention to the interpretation of the experiments on Bell's inequalities and to decoherence theory, but topics on unsharp QM, the consistent-history approach, quantum probability and alternative theories are also discussed. Furthermore, a number of historical and philosophical papers are devoted to Planck's, Weyl's and Pauli's thought, but topics such as quantum ontology, predictivity of quantum laws, etc., are treated.
Download or read book Fundamental Problems of Mesoscopic Physics Interactions and Decoherence written by Igor V. Lerner and published by Springer Science & Business Media. This book was released on 2004-08-04 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Research Workshop, held in Granada, Spain, 6-12 September 2003
Download or read book Manipulating Quantum Systems written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2020-09-14 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of atomic, molecular, and optical (AMO) science underpins many technologies and continues to progress at an exciting pace for both scientific discoveries and technological innovations. AMO physics studies the fundamental building blocks of functioning matter to help advance the understanding of the universe. It is a foundational discipline within the physical sciences, relating to atoms and their constituents, to molecules, and to light at the quantum level. AMO physics combines fundamental research with practical application, coupling fundamental scientific discovery to rapidly evolving technological advances, innovation and commercialization. Due to the wide-reaching intellectual, societal, and economical impact of AMO, it is important to review recent advances and future opportunities in AMO physics. Manipulating Quantum Systems: An Assessment of Atomic, Molecular, and Optical Physics in the United States assesses opportunities in AMO science and technology over the coming decade. Key topics in this report include tools made of light; emerging phenomena from few- to many-body systems; the foundations of quantum information science and technologies; quantum dynamics in the time and frequency domains; precision and the nature of the universe, and the broader impact of AMO science.
Download or read book Decoherence Control and Encoding of Coupled Solid state Quantum Bits written by Markus János Storcz and published by . This book was released on 2005 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Decoherence and Measurement of Charge Qubits in Double Quantum Dots written by Udo Hartmann and published by . This book was released on 2005 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Decoherence Suppression in Quantum Systems 2008 written by Mikio Nakahara and published by World Scientific. This book was released on 2010 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elementary mathematical framework for open quantum d-level systems : decoherence overview / G. Kimura -- Quantum error correction and fault-tolerant quantum computing / F. Gaitan and R. Li -- Composite pulses as geometric quantum gates / Y. Ota and Y. Kondo -- Quantum wipe effect / A. SaiToh, R. Rahimi, M. Nakahara -- Holonomic quantum gates using isospectral deformation of Ising model / M. Bando [und weitere]
Download or read book Thermodynamics and Synchronization in Open Quantum Systems written by Gonzalo Manzano Paule and published by Springer. This book was released on 2018-07-04 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores some of the connections between dissipative and quantum effects from a theoretical point of view. It focuses on three main topics: the relation between synchronization and quantum correlations, the thermodynamical properties of fluctuations, and the performance of quantum thermal machines. Dissipation effects have a profound impact on the behavior and properties of quantum systems, and the unavoidable interaction with the surrounding environment, with which systems continuously exchange information, energy, angular momentum and matter, is ultimately responsible for decoherence phenomena and the emergence of classical behavior. However, there is a wide intermediate regime in which the interplay between dissipative and quantum effects gives rise to a plethora of rich and striking phenomena that has just started to be understood. In addition, the recent breakthrough techniques in controlling and manipulating quantum systems in the laboratory have made this phenomenology accessible in experiments and potentially applicable.
Download or read book Classical and Quantum Information written by Dan C. Marinescu and published by Academic Press. This book was released on 2011-01-07 with total page 745 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new discipline, Quantum Information Science, has emerged in the last two decades of the twentieth century at the intersection of Physics, Mathematics, and Computer Science. Quantum Information Processing is an application of Quantum Information Science which covers the transformation, storage, and transmission of quantum information; it represents a revolutionary approach to information processing. Classical and Quantum Information covers topics in quantum computing, quantum information theory, and quantum error correction, three important areas of quantum information processing. Quantum information theory and quantum error correction build on the scope, concepts, methodology, and techniques developed in the context of their close relatives, classical information theory and classical error correcting codes. - Presents recent results in quantum computing, quantum information theory, and quantum error correcting codes - Covers both classical and quantum information theory and error correcting codes - The last chapter of the book covers physical implementation of quantum information processing devices - Covers the mathematical formalism and the concepts in Quantum Mechanics critical for understanding the properties and the transformations of quantum information
Download or read book Broad Bandwidth and High Dimensional Quantum Memory Based on Atomic Ensembles written by Dong-Sheng Ding and published by Springer. This book was released on 2017-12-26 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents an experimental study of quantum memory based on cold atomic ensembles and discusses photonic entanglement. It mainly focuses on experimental research on storing orbital angular momentum, and introduces readers to methods for storing a single photon carried by an image or an entanglement of spatial modes. The thesis also discusses the storage of photonic entanglement using the Raman scheme as a step toward implementing high-bandwidth quantum memory. The storage of photonic entanglement is central to achieving long-distance quantum communication based on quantum repeaters and scalable linear optical quantum computation. Addressing this key issue, the findings presented in the thesis are very promising with regard to future high-speed and high-capacity quantum communications.
Download or read book Introductory Quantum Optics written by Christopher C. Gerry and published by Cambridge University Press. This book was released on 2023-11-30 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: This established textbook provides an accessible but comprehensive introduction to the quantum nature of light and its interaction with matter. The field of quantum optics is covered with clarity and depth, from the underlying theoretical framework of field quantization, atom–field interactions, and quantum coherence theory, to important and modern applications at the forefront of current research such as quantum interferometry, squeezed light, quantum entanglement, cavity quantum electrodynamics, laser-cooled trapped ions, and quantum information processing. The text is suitable for advanced undergraduate and graduate students and would be an ideal main text for a course on quantum optics. This long-awaited second edition builds upon the success of the first edition, including many new developments in the field, particularly in the area of quantum state engineering. Additional homework problems have been added, and content from the first edition has been updated and clarified throughout.
Download or read book Description and Control of Decoherence in Quantum Bit Systems written by Henryk Peter Gregor Gutmann and published by . This book was released on 2005 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Decoherence mechanisms of laterally defined double quantum dot qubits coupled to the environment written by Gunnar Petersen and published by . This book was released on 2013 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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
