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Author : Andrew A. J. James
Release : 2008
Genre : Antiferromagnetism
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Dynamical Correlations of Low Dimensional Quantum Magnets by : Andrew A. J. James
Download or read book Dynamical Correlations of Low Dimensional Quantum Magnets written by Andrew A. J. James. This book was released on 2008. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Pierre Bouillot
Release : 2012-12-14
Genre : Computers
Kind : eBook
Book Rating : 089/5 ( reviews)
Book Synopsis Statics and Dynamics of Weakly Coupled Antiferromagnetic Spin-1/2 Ladders in a Magnetic Field by : Pierre Bouillot
Download or read book Statics and Dynamics of Weakly Coupled Antiferromagnetic Spin-1/2 Ladders in a Magnetic Field written by Pierre Bouillot. This book was released on 2012-12-14. Available in PDF, EPUB and Kindle. Book excerpt: This thesis shows how a combination of analytic and numerical techniques, such as a time dependent and finite temperature Density Matrix Renormalization Group (DMRG) technique, can be used to obtain the physical properties of low dimensional quantum magnets with an unprecedented level of accuracy. A comparison between the theory and experiment then enables these systems to be used as quantum simulators; for example, to test various generic properties of low dimensional systems such as Luttinger liquid physics, the paradigm of one dimensional interacting quantum systems. Application of these techniques to a material made of weakly coupled ladders (BPCB) allowed the first quantitative test of Luttinger liquids. In addition, other physical quantities (magnetization, specific heat etc.), and more remarkably the spins-spin correlations – directly measurable in neutron scattering experiments – were in excellent agreement with the observed quantities. We thus now have tools to quantitatiively assess the dynamics for this class of quantum systems.
Author : Alexander Clemens Tiegel
Release : 2016
Genre :
Kind : eBook
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Book Synopsis Finite-temperature Dynamics of Low-dimensional Quantum Systems with DMRG Methods by : Alexander Clemens Tiegel
Download or read book Finite-temperature Dynamics of Low-dimensional Quantum Systems with DMRG Methods written by Alexander Clemens Tiegel. This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is concerned with the numerical study of one-dimensional (1D) spin-1/2 quantum magnets and related method development. Its focus is on the calculation of dynamical spin correlation functions both at zero and finite temperature. This is motivated by the accessibility of dynamical quantities in experiments such as inelastic neutron scattering (INS) and electron spin resonance (ESR). The numerical methods used in this thesis are based on extensions of the density-matrix renormalization group (DMRG) and are formulated in the framework of matrix product states (MPS). While zero-tempe...
Author : Adam Iaizzi
Release : 2018-11-28
Genre : Science
Kind : eBook
Book Rating : 032/5 ( reviews)
Book Synopsis Magnetic Field Effects in Low-Dimensional Quantum Magnets by : Adam Iaizzi
Download or read book Magnetic Field Effects in Low-Dimensional Quantum Magnets written by Adam Iaizzi. This book was released on 2018-11-28. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is a tour-de-force combination of analytic and computational results clarifying and resolving important questions about the nature of quantum phase transitions in one- and two-dimensional magnetic systems. The author presents a comprehensive study of a low-dimensional spin-half quantum antiferromagnet (the J-Q model) in the presence of a magnetic field in both one and two dimensions, demonstrating the causes of metamagnetism in such systems and providing direct evidence of fractionalized excitations near the deconfined quantum critical point. In addition to describing significant new research results, this thesis also provides the non-expert with a clear understanding of the nature and importance of computational physics and its role in condensed matter physics as well as the nature of phase transitions, both classical and quantum. It also contains an elegant and detailed but accessible summary of the methods used in the thesis—exact diagonalization, Monte Carlo, quantum Monte Carlo and the stochastic series expansion—that will serve as a valuable pedagogical introduction to students beginning in this field.
Author : Benedikt Fauseweh
Release : 2016
Genre :
Kind : eBook
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Book Synopsis Dynamic Correlations in One-dimensional Quantum Magnets at Finite Temperature by : Benedikt Fauseweh
Download or read book Dynamic Correlations in One-dimensional Quantum Magnets at Finite Temperature written by Benedikt Fauseweh. This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt:
