scholarly journals Inapproximability after Uniqueness Phase Transition in Two-Spin Systems

2012 ◽  
pp. 336-347
Author(s):  
Jin-Yi Cai ◽  
Xi Chen ◽  
Heng Guo ◽  
Pinyan Lu
Keyword(s):  
Phase Transition ◽  
Spin Systems

scholarly journals Phase transition for loop representations of quantum spin systems on trees

2018 ◽  
Vol 59 (11) ◽  
pp. 113302 ◽  
Author(s):  
Volker Betz ◽  
Johannes Ehlert ◽  
Benjamin Lees
Keyword(s):  
Phase Transition ◽  
Quantum Spin ◽  
Spin Systems ◽  
Quantum Spin Systems

Detecting quantum phase transition in multipartite spin systems via bipartite detectors

2019 ◽  
Vol 16 (9) ◽  
pp. 095702
Author(s):  
Jixue Liu ◽  
Jiaojiao Chen ◽  
Jiadong Shi ◽  
Tao Wu
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Spin Systems ◽  
Quantum Phase

Grain size effect on magnetic and phase transition features in one-dimensional S = 1/2 Heisenberg spin chain molecular crystals

2015 ◽  
Vol 39 (7) ◽  
pp. 5395-5401 ◽  
Author(s):  
Guo-Jun Yuan ◽  
Yun-Xia Sui ◽  
Jian-Lan Liu ◽  
Xiao-Ming Ren
Keyword(s):  
Phase Transition ◽  
Grain Size ◽  
Spin Chain ◽  
Molecular Crystals ◽  
Spin Systems ◽  
Grain Size Effect ◽  
Heisenberg Spin ◽  
One Dimensional ◽  
Heisenberg Spin Chain ◽  
Molecular Spin

Magnetic and thermal behaviors and the phase transition nature are strongly influenced by grain size in one-dimensional S = 1/2 molecular spin systems.

THE STUDY OF QUENCHED BOND RANDOMNESS BY WANG–LANDAU ALGORITHM

2007 ◽  
Vol 18 (07) ◽  
pp. 1107-1117
Author(s):  
FATIH YAŞAR
Keyword(s):  
Phase Transition ◽  
Ground State ◽  
Probability Distributions ◽  
Spin Systems ◽  
State Entropy ◽  
First Order ◽  
First Order Phase Transition ◽  
Pure Case ◽  
First Order Phase ◽  
Physical Quantities

Monte Carlo simulations using the recently proposed Wang–Landau algorithm are performed to the q = 8 state Potts model in two dimension with various degrees of randomness. We systematically studied the effect of quenched bond randomness to system which has first-order phase transition. All simulations and measurements were done from pure case r = 1 to r = 0.4. Physical quantities such as energy density and ground-state entropy were evaluated at all temperatures. We have also obtained probability distributions of energy to monitor softening of transitions. It appears quite feasible to simulate spin systems with quenched bond randomness by Wang–Landau algorithm.

scholarly journals Geometric phases and criticality in spin systems

2006 ◽  
Vol 364 (1849) ◽  
pp. 3463-3476 ◽  
Author(s):  
Jiannis K Pachos ◽  
Angelo C.M Carollo
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Spin System ◽  
Arbitrary Spin ◽  
Spin Systems ◽  
Quantum Phase ◽  
Geometric Phases ◽  
Interacting Spin Systems ◽  
The Way

A general formalism of the relation between geometric phases produced by circularly evolving interacting spin systems and their criticality behaviour is presented. This opens up the way for the use of geometric phases as a tool to probe regions of criticality without having to undergo a quantum phase transition. As a concrete example, a spin-1/2 chain with XY interactions is considered and the corresponding geometric phases are analysed. Finally, a generalization of these results to the case of an arbitrary spin system is presented.

Stanley-Kaplan Phase Transition in Two-Layered Heisenberg Spin Systems

1974 ◽  
Vol 61 (2) ◽  
pp. K67-K69 ◽  
Author(s):  
A. Zagórski ◽  
A. Sukiennicki
Keyword(s):  
Phase Transition ◽  
Spin Systems ◽  
Heisenberg Spin
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