Phase transition between quantum and classical regimes for the escape rate of a biaxial spin system

1999 ◽  
Vol 59 (18) ◽  
pp. 11847-11851 ◽  
Author(s):  
Gwang-Hee Kim
Keyword(s):  
Phase Transition ◽  
Spin System ◽  
Escape Rate

scholarly journals Quantum-classical transition of the escape rate of a uniaxial spin system in an arbitrarily directed field

1998 ◽  
Vol 57 (21) ◽  
pp. 13639-13654 ◽  
Author(s):  
D. A. Garanin ◽  
X. Martínez Hidalgo ◽  
E. M. Chudnovsky
Keyword(s):  
Spin System ◽  
Escape Rate ◽  
Classical Transition

scholarly journals Magnetic-field induced quantum phase transition and critical behavior in a gapped spin system

2007 ◽  
Vol 310 (2) ◽  
pp. 1352-1354 ◽  
Author(s):  
F. Yamada ◽  
T. Ono ◽  
M. Fujisawa ◽  
H. Tanaka ◽  
T. Sakakibara
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Quantum Phase Transition ◽  
Spin System ◽  
Critical Behavior ◽  
Quantum Phase

scholarly journals Pressure-Induced Magnetic Quantum Phase Transition in Gapped Spin System KCuCl3

2006 ◽  
Vol 75 (6) ◽  
pp. 064703 ◽  
Author(s):  
Kenji Goto ◽  
Masashi Fujisawa ◽  
Hidekazu Tanaka ◽  
Yoshiya Uwatoko ◽  
Akira Oosawa ◽  
...  
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Spin System ◽  
Quantum Phase

scholarly journals THREE-DIMENSIONAL GONIHEDRIC SPIN SYSTEM

2002 ◽  
Vol 17 (12) ◽  
pp. 751-761 ◽  
Author(s):  
G. KOUTSOUMBAS ◽  
G. K. SAVVIDY
Keyword(s):  
Phase Transition ◽  
Spin System ◽  
Order Approximation ◽  
Three Dimensional ◽  
Extrinsic Curvature ◽  
Original Model ◽  
Coupling Constants ◽  
Spin Interaction ◽  
First Order ◽  
Isotropic Point

We perform Monte–Carlo simulations of a three-dimensional spin system with a Hamiltonian which contains only four-spin interaction term. This system describes random surfaces with extrinsic curvature – gonihedric action. We study the anisotropic model when the coupling constants βS for the space-like plaquettes and βT for the transverse-like plaquettes are different. In the two limits βS = 0 and βT = 0 the system has been solved exactly and the main interest is to see what happens when we move away from these points towards the isotropic point, where we recover the original model. We find that the phase transition is of first order for βT = βS ≈ 0.25, while away from this point it becomes weaker and eventually turns to a crossover. The conclusion which can be drawn from this result is that the exact solution at the point βS = 0 in terms of 2D-Ising model should be considered as a good zero-order approximation in the description of the system also at the isotropic point βS = βT and clearly confirms the earlier findings that at the isotropic point the original model shows a first-order phase transition.

scholarly journals Topological phase transition of a fractal spin system: The relevance of the network complexity

AIP Advances ◽  
2016 ◽  
Vol 6 (5) ◽  
pp. 055703
Author(s):  
Felipe Torres ◽  
José Rogan ◽  
Miguel Kiwi ◽  
Juan Alejandro Valdivia
Keyword(s):  
Phase Transition ◽  
Spin System ◽  
Topological Phase ◽  
Topological Phase Transition

scholarly journals Dissipative phase transition in a central spin system

2012 ◽  
Vol 86 (1) ◽  
Author(s):  
E. M. Kessler ◽  
G. Giedke ◽  
A. Imamoglu ◽  
S. F. Yelin ◽  
M. D. Lukin ◽  
...  
Keyword(s):  
Phase Transition ◽  
Spin System
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