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Numerical Renormalization Group Studies Of Quantum Impurity Models In The Strong Coupling Limit
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Book Synopsis Numerical Renormalization Group Studies of Quantum Impurity Models in the Strong Coupling Limit by : Michael Sindel
Download or read book Numerical Renormalization Group Studies of Quantum Impurity Models in the Strong Coupling Limit written by Michael Sindel and published by . This book was released on 2004 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quench Dynamics in Interacting and Superconducting Nanojunctions by : Rubén Seoane Souto
Download or read book Quench Dynamics in Interacting and Superconducting Nanojunctions written by Rubén Seoane Souto and published by Springer Nature. This book was released on 2020-02-05 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effects of many-body interactions and superconducting correlations have become central questions in the quantum transport community. While most previous works investigating current fluctuations in nanodevices have been restricted to the stationary regime, Seoane's thesis extends these studies to the time domain. It provides relevant information about the time onset of electronic correlations mediated by interactions and superconductivity. This knowledge is essential for the development of fast electronic devices, as well as novel applications requiring fast manipulations, such as quantum information processing. In addition, the thesis establishes contact with issues of broad current interest such as non-equilibrium quantum phase transitions.
Book Synopsis Numerical Renormalization Group Studies in Complex Quantum Impurity Systems by : Christian Kolf
Download or read book Numerical Renormalization Group Studies in Complex Quantum Impurity Systems written by Christian Kolf and published by . This book was released on 2006 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantum Impurity Problems in the Framework of Natural Orbitals by : Maxime Debertolis
Download or read book Quantum Impurity Problems in the Framework of Natural Orbitals written by Maxime Debertolis and published by Springer Nature. This book was released on 2024-01-03 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a complete study of natural orbitals in quantum impurity problems, revealing a certain simplicity in these interacting many-body problems. These systems consist of a few localized degrees of freedom that undergo strong interactions and hybridize with a larger system of free particles; they are central in the study of strongly correlated systems. In a first step, the standard non-perturbative numerical renormalization group method is employed to demonstrate the hierarchical structure of correlations unveiled by natural orbitals. This simplification brought new insights for simulating quantum impurity problems, and a new algorithm is developed to generate an optimized subset of natural orbitals independently of existing methods, going beyond their usual limitations. This algorithm is presented in detail in the book, and a careful benchmark on known results is carried out to guarantee the validity of the method. It is then used to study spatial entanglement structures under various conditions that were not accessible with previous methods, such as representing the electron bath by a realistic 2D square lattice or taking account of static disorder in the metallic host. In the last chapter, the non-interacting problem in the presence of disorder is studied through random matrix theory, reproducing some of the results presented in the previous chapters. The main original result of this chapter lies in the analytical calculation of the joint distribution of one-particle orbitals energies and amplitudes of the impurity, which makes it possible to calculate any disordered averaged local correlation functions. Starting from this result, calculations in the large-N limit are compared with numerical simulations.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Book Synopsis A Numerical Renormalization Group Approach to Dissipative Quantum Impurity Systems by : David Roosen
Download or read book A Numerical Renormalization Group Approach to Dissipative Quantum Impurity Systems written by David Roosen and published by . This book was released on 2011 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analytical and Numerical Study of Quantum Impurity Systems in the Intermediate and Strong Coupling Regimes by : Davide Mantelli
Download or read book Analytical and Numerical Study of Quantum Impurity Systems in the Intermediate and Strong Coupling Regimes written by Davide Mantelli and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Real-space correlations in dissipative quantum systems by : Etienne Gärtner
Download or read book Real-space correlations in dissipative quantum systems written by Etienne Gärtner and published by Cuvillier Verlag. This book was released on 2014-11-27 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: While multiple qubits in a quantum register should behave independently, their connection to a common environment may spoil that independence, as they start to influence each other via the environment. In this work two qubits, modelled by magnetic spin-1/2 impurities, are investigated which are coupled at a finite distance to the same dissipative environment. From the spin-boson model it is known that there exists a phase for weak coupling where the spin is not localised in any state and may thus explore the whole SU(2) Bloch sphere, while for strong coupling it is localised in one of two configurations, completely destroying its quantum mechanical nature. As a second spin is coupled in direct vicinity of the first, the environment mediates an effective ferromagnetic interaction between the spins, rendering them no longer independent. Within the Numerical Renormalization Group (NRG) it is investigated at which point the two spins can be treated independently as the distance between them is increased. To this end a two-channel bosonic NRG is developed that can deal with the model and its limit of two independent spin-boson models. The two-channel NRG is first tested on a model incorporating a single oscillator as an impurity. While the latter model only involves a single channel, a self-interaction of the impurity oscillator provides accessible limits, where the numerical implementation of the two-channel NRG can be tested. Furthermore signals of the different impurities are traced in the environment by means of thermal averages and their changes due to the presence of the impurities. Das Werk behandelt den Einfluss von Quantenstörstellen innerhalb einer dissipativen Umgebung sowohl aufeinander als auch auf ihre Umgebung. Die Störstellen werden hierbei entweder durch einen Oszillator oder durch zwei Qubits realisiert. Da die betrachteten Systeme für eine Vielzahl von Parametern nicht analytisch lösbar sind, wird eine Zwei-Kanal-NRG (Numerische Renormierungsgruppe) für bosonische Modelle entwickelt. Details dieser NRG und ihrer Implementierung werden in der Arbeit vorgestellt. Eine Untersuchung der Flussdiagramme der Zwei-Qubit-Systeme deutet auf einen Grundzustand hin, in dem die Quantenstörstellen effektiv ferromagnetisch gekoppelt sind. In diesem Zustand zeigen sowohl die mittlere Besetzung als auch die mittlere Auslenkung der Umgebungsorbitale eine deutliche Erhöhung direkt an den Störstellen. Die eindeutige Zuordnung einer Längenskala, auf der die betrachteten Signale abnehmen, ist derzeit nicht möglich.
Book Synopsis Quantum Magnetism by : Bernard Barbara
Download or read book Quantum Magnetism written by Bernard Barbara and published by Springer Science & Business Media. This book was released on 2008-06-24 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This bookis based on some of the lectures duringthe Paci?c Institute of Theoretical Physics (PITP) summer school on “Quantum Magnetism”, held during June 2006 in Les Houches, in the French Alps. The school was funded jointly by NATO, the CNRS, and PITP, and entirely organized by PITP. Magnetism is a somewhat peculiar research ?eld. It clearly has a quant- mechanical basis – the microscopic exchange interactions arise entirely from the exclusion principle, in conjunction with repulsive interactions between electrons. And yet until recently the vast majority of magnetism researchersand users of m- netic phenomena around the world paid no attention to these quantum-mechanical roots. Thus, e.g., the huge ($400 billion per annum) industry which manufactures hard discs, and other components in the information technology sector, depends entirely on room-temperature properties of magnets – yet at the macroscopic or mesoscopic scales of interest to this industry, room-temperature magnets behave entirely classically.
Book Synopsis Journal of the Physical Society of Japan by :
Download or read book Journal of the Physical Society of Japan written by and published by . This book was released on 2014 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heavy-Fermion Systems by : Prasanta Misra
Download or read book Heavy-Fermion Systems written by Prasanta Misra and published by Elsevier. This book was released on 2007-12-11 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book on Heavy-Fermion Systems is a part of the Book series "Handbook of Metal Physics", each volume of which is written to facilitate the research of Ph.D. students, faculty and other researchers in a specific area. The Heavy-Fermions (sometimes known as Heavy-Electrons) is a loosely defined collection of intermetallic compounds containing rare-earth (mostly Ce) or actinide (mostly U) elements. These unusual names were given due to the large effective mass (100-1,000 times greater than the mass of a free electron) below a critical temperature. They have a variety of ground states including superconducting, antiferromagnetic, paramagnetic or semiconducting. Some display unusual magnetic properties such as magnetic quantum critical point and metamagnetism. This book is essentially a summary as well as a critical review of the theoretical and experimental work done on Heavy Fermions. · Extensive research references. · Comprehensive review of a very rapidly growing number of theories. · Summary of all important experiments. · Comparison with other highly correlated systems such as High-Tc Superconductors. · Possible Technological applications.
Book Synopsis Numerical Renormalization Group Based Simulations of Quantum Impurity Systems by : Johannes Stengele
Download or read book Numerical Renormalization Group Based Simulations of Quantum Impurity Systems written by Johannes Stengele and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Kondo Problem to Heavy Fermions by : Alexander Cyril Hewson
Download or read book The Kondo Problem to Heavy Fermions written by Alexander Cyril Hewson and published by Cambridge University Press. This book was released on 1997-04-28 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: The behaviour of magnetic impurities in metals has posed problems to challenge the condensed matter theorist over the past 30 years. This book deals with the concepts and techniques which have been developed to meet this challenge, and with their application to the interpretation of experiments. This book will be of interest to condensed matter physicists, particularly those interested in strong correlation problems. The detailed discussions of advanced many-body techniques should make it of interest to theoretical physicists in general.
Book Synopsis Renormalization Group Methods for Quantum Impurity Systems by : Walter Hofstetter
Download or read book Renormalization Group Methods for Quantum Impurity Systems written by Walter Hofstetter and published by . This book was released on 2000 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Real-time Dynamics and Critical Phenomena of Quantum Impurity Systems by :
Download or read book Real-time Dynamics and Critical Phenomena of Quantum Impurity Systems written by and published by . This book was released on 2013 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Renormalization Group Calculations for Impurity Quantum Phase Transitions by : Hyun Jung Lee
Download or read book Numerical Renormalization Group Calculations for Impurity Quantum Phase Transitions written by Hyun Jung Lee and published by . This book was released on 2007 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modern Theory of Thermoelectricity by : Veljko Zlatić
Download or read book Modern Theory of Thermoelectricity written by Veljko Zlatić and published by Oxford University Press, USA. This book was released on 2014 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the theory of thermoelectric effects, both from a practical and a fundamental perspective, and presents many examples of applications of the theory to real materials.
