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- The classical XY model (sometimes also called classical rotor (rotator) model or O (2) model) is a lattice model of statistical mechanics. In general, the XY model can be seen as a specialization of Stanley's n -vector model for n = 2.
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See all on WikipediaThe quantum Heisenberg model, developed by Werner Heisenberg, is a statistical mechanical model used in the study of critical points and phase transitions of magnetic systems, in which the spins of the magnetic systems are treated quantum mechanically. It is related to the prototypical Ising model, where … See more
For quantum mechanical reasons (see exchange interaction or Magnetism § Quantum-mechanical origin of magnetism), the dominant coupling between two dipoles may cause nearest-neighbors to have lowest energy … See more
• Another important object is entanglement entropy. One way to describe it is to subdivide the unique ground state into a block (several … See more
Wikipedia text under CC-BY-SA license WebHeisenberg chain, known as the XY model, which was originally studied in great detail in [3]. The XY model, which can be obtained from the Heisenberg Hamiltonian by turning …
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WebJan 3, 2001 · We study the entanglement in the quantum Heisenberg XY model in which the so-called W entangled states can be generated for 3 or 4 qubits. By the concept of …
WebThe XXZ model is a deformation of the Heisenberg model breaking the SU(2) symmetry down to a U(1) subgroup. The degrees of freedom of the XY model are classical xed …
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WebDec 10, 2010 · Here we report the first experimental study using the geometric phase as a topological test of quantum transitions of the ground state in a Heisenberg X Y spin …
Web2 XY model In the classical xy-model, the variables are two-dimensional unit vectors ~s i on each lattice site, equivalent to an angle θ. This model is a limiting case of the …
WebThe Classical Heisenberg model, developed by Werner Heisenberg, is the case of the n-vector model, one of the models used in statistical physics to model ferromagnetism, …
WebWe investigate the thermal entanglement in the two-qubit isotropic XY model with a magnetic field and in the anisotropic XY model, and find that the thermal entanglement …
Webis addressed for the quantum Heisenberg XY model. Two distinct situations are considered. The first one concerns the anisotropic XYmodel and the second situation …
WebAbstract. The quantum Fisher information matrix provides us with a tool to determine the precision, in any multiparametric estimation protocol, through quantum Cramér–Rao …
WebIn the following we present an introduction to the mathematical theory of the XY spin chain. The importance of this model lies in the fact, rst understood by Lieb, Schultz and Mattis …
Quantum correlations in the frustrated XY model on the …
WebSep 25, 2023 · Abstract. We have investigated the spin-1/2 XY frustrated antiferromagnetic Heisenberg honeycomb model, which features an intermediate …
Quantum coherence and its distribution in a two-dimensional …
WebAug 15, 2022 · This study aims to contribute to this field by exploring a two-dimensional XY model. We will investigate the quantum critical phenomena in the two-dimensional …
Quantum Fisher information matrix in Heisenberg XY model
WebApr 16, 2019 · In this work, we have studied multiparametric estimation strategy in quantum metrology by focusing on two variants of the Heisenberg XY model. The first one …
Spin transport in a tunable Heisenberg model realized with …
WebDec 17, 2020 · Here we realize the Heisenberg model describing spins on a lattice, with fully adjustable anisotropy of the nearest-neighbour spin–spin couplings (called the XXZ …
Dynamics of two-qubit Heisenberg XY state: external magnetic
WebSep 21, 2023 · Based on Milburn’s intrinsic decoherence model, a particular dynamics for the anisotropic two-qubit Heisenberg XY model has been found to explore the …
Long-range-ordered phase in a quantum Heisenberg chain with ...
WebJul 6, 2021 · Employing both analytical spin-wave theory as well as numerical density-matrix renormalization group calculations, we find that there is a large parameter regime where …
A comparative study of local quantum Fisher information and local ...
WebJul 8, 2019 · Quantum Heisenberg XY model. 1. Introduction. Quantum entanglement, as a special type of quantum correlations, is a key ingredient in quantum information science …
WebTwo special Heisenberg XY models are considered. The first one concerns the anisotropic XY model in which the temperature Tand the anisotropic parameter γare …
Exact solution of the Heisenberg XX model with twisted boundary ...
WebSep 7, 2020 · Exact solution. Twisted boundary. Heisenberg XX model. 1. Introduction. The Heisenberg spin system has been studied widely in statistical physics and mathematical …
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Energy Barriers for the Spontaneous Magnetization Reversal
WebWithin the framework of the continuous XY model, analytical expressions are derived to calculate the time of the spontaneous magnetization reversal of finite-length atomic …
[2301.11917] Everything is a quantum Ising model - arXiv.org
WebJan 27, 2023 · This leads to striking correspondences, such as the spin-1/2 XY and Heisenberg models arising from the large-field limit of 3-state and 4-state Potts models, …
Web2 days ago · II. MODEL The working medium consists of three qubits described by a Heisenberg XXX model with nearest-neighbor inter-actions, uniaxial magnetic …
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