搜索结果: 1-15 共查到“物理学 Quantum phase”相关记录22条 . 查询时间(0.125 秒)
Scientists capture first-ever view of a hidden quantum phase in a 2D crystal（图）
二维晶体 隐藏量子相 视图 单脉冲光谱技术
2023/6/6
The development of high-speed strobe-flash photography in the 1960s by the late MIT professor Harold “Doc” Edgerton allowed us to visualize events too fast for the eye — a bullet piercing an apple, or...
Weak First-Order Superfluid-Solid Quantum Phase Transitions
Zero the two-dimensional lattice model monte carlo simulation the Hamiltonian parameter space
2014/12/20
We study superfluid-solid zero-temperature transitions in two-dimensional lattice boson-spin models using worm-algorithm Monte Carlo simulations. We observe that such transitions are typically first o...
On the probability of quantum phase slips in superconducting nanowires
quantum phase slips superconducting nanowires
2012/2/27
The paper discusses mechanisms for decay of supercurrents in ultrathin superconducting wires driven by quantum fluctuations. We argue that momentum conservation strongly suppresses probability of such...
Avoid First Order Quantum Phase Transition by Changing Problem Hamiltonians
Quantum Phase Transition Changing Problem Hamiltonians
2010/10/29
The problem Hamiltonian of the adiabatic quantum algorithm for the maximum-weight independent set problem (MIS) that is based on the reduction to the Ising problem has flexible parameters. We show tha...
Nonlinear Landau-Zener tunneling in quantum phase space
Nonlinear tunneling quantum phase space
2010/10/29
We present a detailed analysis of the Landau-Zener problem for an interacting Bose-Einstein condensate in a time-varying double-well trap, especially focussing on the relation between the full many-p...
Multi-partite entanglement and quantum phase transition in the one-, two-, and three-dimensional transverse field Ising model
Multi-partite entanglement quantum phase transition transverse field Ising model
2010/10/19
In this paper we consider the quantum phase transition in the Ising model in the presence of
a transverse field in one, two and three dimensions from a multi-partite entanglement point of
view. Usin...
Quantum phase with no translational symmetry and its potentiality for quantum communication
Quantum phase symmetry quantum communication
2010/4/16
By the method of terahertz photo-voltaic spectroscopy we have found a quantum phase that possesses neither continuous nor discrete translational symmetry. The phase is originated from quantum Hall sta...
Ion-trap simulation of the quantum phase transition in an exactly solvable model of spins coupled to bosons
phase transition bosons Ion-trap simulation
2010/3/10
It is known that arrays of trapped ions can be used to efficiently simulate a variety of many-body quantum systems. Here, we show how it is possible to build a model representing a spin chain interact...
Decoherence due to an excited state quantum phase transition in a two-level boson model
Decoherence excited state quantum phase transition two-level boson model
2010/3/10
The decoherence induced on a single qubit by its interaction with the environment is studied. The environment is modelled as a scalar two-level boson system that can go through either first order or c...
Decoherence as a signature of an excited state quantum phase transition
Decoherence excited state quantum phase transition
2010/3/10
We analyze the decoherence induced on a single qubit by the interaction with a two-level boson system with critical internal dynamics. We explore how the decoherence process is affected by the presenc...
Quantum entanglement in a many-body system exhibiting multiple quantum phase transitions
Quantum phase transitions Many body systems
2010/7/5
We investigate the quantum entanglement-related features of the many-body model of Plastino and Moszkowski [N. Cimento 47 (1978) 470]. This is an exactly solvable N-body, SU2 two-level model exhibitin...
Quantum Phase Transition in a Pseudo-hermitian Dicke model
Quantum Phase Transition Pseudo-hermitian Dicke model
2010/4/8
We show that a Dicke-type pseudo-hermitian Hamiltonian undergoes quantum phase transition by mapping it to the "Dressed Dicke Model" through a similarity transformation. We find the positive-definite ...
Quantum phase diagram of fermion mixtures with population imbalance in one-dimensional optical lattices
Quantum phase diagram of fermion population imbalance one-dimensional optical lattices
2010/4/12
With a recently developed time evolving block decimation (TEBD) algorithm, we numerically study the ground state quantum phase diagram of fermi mixtures with attractive inter-species interactions load...
Quantum Phase Transition in Two Species of Cold Bosonic Atoms
Bose-Einstein condensate phase transition
2007/8/15
2007Vol.47No.3pp.467-470DOI:
Quantum Phase Transition in Two Species of Cold Bosonic Atoms
YU Zhao-Xian,1,2,3 LIANG Jiu-Qing,1 JIAO Zhi-Yong,3 and WANG
Ji-Suo4
1 Institu...
Quantum Phase Transition in Quasi-two-dimensional
Heisenberg Antiferromagnet with Single-Ion Anisotropy
spatially anisotropic Heisenberg model single-ion anisotropy
functional integration Schwinger-Boson representation
2007/8/15
2007Vol.47No.1pp.171-180DOI:
Quantum Phase Transition in Quasi-two-dimensional
Heisenberg Antiferromagnet with Single-Ion Anisotropy
JI An-Chun and TIAN Guang-Shan
Schoo...