Low-Dimensional Quantum Spin Systems

05.31.2022

PDF Strongly correlated systems: from electronic... - Harvard University.
Electric field control of superconductivity at the LaAlO3.
Integrability in Low‐Dimensional Quantum Systems | MATRIX.
Spin-Peierls transition in low-dimensional quantum spin systems: a.
Browse Articles | Nature Materials.
Cooling low-dimensional electron systems into the microkelvin regime.
[PDF] Low-dimensional Quantum Spin Systems | Semantic Scholar.
Low Dimensional Quantum Spin System - A.
PDF One-dimensional quantum spin dynamics of Bethe string states.
Continuous and discontinuous quantum phase transitions in a model two.
On the Existence of Long-range Order in Low-dimensional Quantum Spin.
Identification and investigation of new low-dimensional quantum spin.
Rounding of first order transitions in low-dimensional quantum systems.
Pulse-field Experiments on The Spin-lattice Interaction in Low.

PDF Strongly correlated systems: from electronic... - Harvard University.

Several exactly solvable quantum spin models with incommensurate magnetic structures, which manifest quantum phase transitions between incommensurate and commensurate phases, are proposed. The ground-state and thermodynamic characteristics of these quantum spin antiferromagnetic models with the Dzyaloshinsky-Moriya antisymmetric exchange interaction and spin-frustrating next-nearest-neighbor. This method presumes a strong coupling between the spin states and the lattice, seen for example in low-dimensional quantum spin systems such as quasi-1D spin-Peierls systems. Indeed, recent magnetostriction measurements of SCBO in pulsed fields point to a sizeable coupling between the spins in the Cu dimers and the lattice.

Electric field control of superconductivity at the LaAlO3.

Physica E: Low-dimensional systems and nanostructures contains papers and invited review articles on the fundamental and applied aspects of physics in low-dimensional electron systems, in semiconductor heterostructures, oxide interfaces, quantum wells and superlattices, quantum wires and dots, novel quantum states of matter such as topological insulators, and Weyl semimetals. Rounding of first order transitions in low-dimensional quantum systems with quenched disorder. Rafael L... Fingerprint; Abstract. We prove that the addition of an arbitrarily small random perturbation to a quantum spin system rounds a first-order phase transition in the conjugate order parameter in d≤2 dimensions, or for cases involving the.

Integrability in Low‐Dimensional Quantum Systems | MATRIX.

Ergodicityfrom Nonergodicityin Quantum Correlations of Low-dimensional Spin R. Prabhu, Aditi Sen(De), and Ujjwal Sen Harish-Chandra Research Institute, Chhatnag Road, Jhunsi, Allahabad 211 019, India. In this contribution we present and discuss our results for selected low-dimensional compounds such as the homogeneous antiferromagnetic Heisenberg spin chain Cu (II)-bispyrazoldihydroxybenzene, which is a new quasi-1d Cu (II)-coordination polymer, the dimerized spin chain (VO) 2 P 2 O 7, and the plateau systems SrCu 2 (BO 3) 2 and NH 4 CuCl 3. Bajnok - Ads/CFT Correspondence From an Integrable Point of View. Bajnok - Finite Volume Diagonal Form Factors and AdS/CFT. Batchelor - The Mixed Ferro-Antiferromagnetic 3-state Quantum Potts Chain, Quantum Chiral Clock Model and Free Parafermions. Braak - Integrable and Non-Integrable Models in Quantum Optics.

Spin-Peierls transition in low-dimensional quantum spin systems: a.

Introduction. The two-dimensional electron gas (2DEG) formed in a GaAs-AlGaAs heterostructure is a very fruitful system for investigating quantum and interaction effects. Electrons are confined to a very narrow layer, becoming effectively two-dimensional. At low temperatures and with high quality material, electrons can travel many microns. Due to graphene's two dimensions, charge fractionalization (where the apparent charge of individual pseudoparticles in low-dimensional systems is less than a single quantum) is thought to occur. It may therefore be a suitable material for constructing quantum computers [27] using anyonic circuits.

Browse Articles | Nature Materials.

View Academics in Low Dimensional Quantum Spin System on A. Kirrily Rule, Australian Nuclear Science and Technology Organization, Bragg Institiute Department, Faculty Member. Studies BMG (Bulk Metallic glasses), Precipitation, and High Entropy Alloys.

Cooling low-dimensional electron systems into the microkelvin regime.

A large number of compounds exists which can effectively be described as low-dimensional spin systems. Thus many of the rigorous results are also of experimental relevance. Ergodic dynamics in isolated quantum systems. Such un-usual kind of dynamics is now known to occur when there is an emergence of extensively many conserved quan-tities. This can happen either because of integrability conditions in low-dimensional systems when interactions are nely tuned [5], or more generically because of the. Spin Quantum Heat Engine Quantified by Quantum Steering Wentao Ji, Zihua Chai, Mengqi Wang, Yuhang Guo, Xing Rong, Fazhan Shi, Changliang Ren, Ya Wang, and Jiangfeng Du Phys. Rev. Lett. 128 , 090602 – Published 1 March 2022.

[PDF] Low-dimensional Quantum Spin Systems | Semantic Scholar.

Topological quantum effects in low-dimensional spin systems - The power of the boundary. Dr. Thore Posske (Group Leader, I. Institute for Theoretical Physics, University of Hamburg, Germany) Manipulating the boundary of low-dimensional magnetic structures could grant control about topological magnetic quantum sates. At lower temperatures there is potential for quantum communication through 1D spin... van der Vliet, H., Theisen, T. et al. Cooling low-dimensional electron systems into the microkelvin.

Low Dimensional Quantum Spin System - A.

In quantum wells grown in the [001] direction, the cubic or spherical symmetry is broken down to the axial rotation symmetry in the plane. These six bands combine to form the spin-up and spin-down (±) states of three quantum well subbands: E1, H1, and L1. We would like to show you a description here but the site won’t allow us. Quantum spin systems are insulating crystals containing regular array of atoms carrying spin S = 1/2 or 1, described by simple spin Hamiltonians. In low-dimensional model compounds, we study by Nuclear Magnetic Resonance (NMR), which is a microscopic probe to magnetism, the magnetic-field-induced "exotic" phases, such as the Bose-Einstein.

PDF One-dimensional quantum spin dynamics of Bethe string states.

In recent times, ab initio density functional theory has emerged as a powerful tool for making the connection between models and materials. Insulating transition metal oxides with a small spin forms a fascinating class of strongly correlated systems that exhibit spin-gap states, spin-charge separation, quantum criticality, superconductivity, etc. Strongly correlated low-dimensional quantum spin models provide a well-established frame- work to study magnetic properties of insulators, and are of great theoretical interest and experimental relevance in condensed-matter physics. In this thesis, I use quantum Monte Carlo methods to numerically study quantum critical behavior in low-dimensional quantum spin models and wavefunctions. First, I.

Continuous and discontinuous quantum phase transitions in a model two.

An attractive feature of some low-dimensional magnets is a spin-liquid state defying a long-range order. The liquid may be either gapped or gapless, dependent on the type of quantum statistics.

On the Existence of Long-range Order in Low-dimensional Quantum Spin.

When global spin rotational invariance is not broken, the conventional spin-wave theory is inapplicable. To proceed, a modified spin-wave theory for low-dimensional quantum magnetic systems is formulated under the constraint of zero magnetization. This theory can describe disordered state directly, and can be generalized to the ordered phase by identifying the magnetic ordering with the Bose. Low-dimensional quantum systems Marcin Szyniszewski (Submitted on 17 Oct 2018) We study low-dimensional quantum systems with analytical and computational methods. Firstly, the one-dimensional extended - model of fermions with interactions of a finite range is investigated. The model exhibits a phase transition between liquid and insulating regimes.

Identification and investigation of new low-dimensional quantum spin.

Explore the latest full-text research PDFs, articles, conference papers, preprints and more on QUANTUM SPIN. Find methods information, sources, references or conduct a literature review on QUANTUM. This thesis focuses on one area of modern condensed matter physics, namely low-dimensional magnetism, and more specifically one-dimensional linear chains. The work herein can be split into three parts. The first part provides a tool for the greater community. I herein propose a Pad´e approximation for the temperature dependent magnetic susceptibility of a S = 3/2 spin chain, that is more. Materials based on a crown ether complex together with magnetic ions, especially Cu(II), can be used to synthesize new low dimensional quantum spin systems.We have prepared the new crown ether complex di-μ-chloro-bis(12-crown-4)-aquadichloro-copper(II)-potassium, K(C 8 H 16 O 4) 2 CuCl 3 ·H 2 O (1), determined its structure, and analyzed its magnetic properties.

Rounding of first order transitions in low-dimensional quantum systems.

The dashed lines indicate the positions of the quantum resistance h/e 2 and the pair quantum resistance R Q. (D) Dependence of zν on V G for 0.45 K ≤ T ≤ 0.65 K (circles) and 1.60 K ≤ T ≤ 1.90 K (squares). The gray shadow highlights the large uncertainty in determining the zν values in the low-temperature regime (see fig. S15).

Pulse-field Experiments on The Spin-lattice Interaction in Low.

In this contribution we present and discuss our results for selected low-dimensional compounds such as the homogeneous antiferromagnetic Heisenberg spin chain Cu (II)-bispyrazoldihydroxybenzene, which is a new quasi-1d Cu (II)-coordination polymer, the dimerized spin chain (VO) 2 P 2 O 7, and the plateau systems SrCu 2 (BO 3) 2 and NH 4 CuCl 3. Low-dimensional quantum spin systems are the subject of intense theoretical and experimental investigation. From a condensed-matter perspective, not only do these systems provide a natural setting for deepening the exploration of many-body quantum coherence properties as demanded by. Here is a discussion of the state of the art of spin resonance in low dimensional structures, such as two-dimensional electron systems, quantum wires, and quantum dots. Leading scientists report on recent advances and discuss open issues and perspectives.