scholarly journals Work statistics and symmetry breaking in an excited-state quantum phase transition

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Zakaria Mzaouali ◽  
Ricardo Puebla ◽  
John Goold ◽  
Morad El Baz ◽  
Steve Campbell
Keyword(s):  
Phase Transition ◽  
Excited State ◽  
Symmetry Breaking ◽  
Quantum Phase Transition ◽  
Quantum Phase

Scaling of the Berry phase close to the excited-state quantum phase transition in the Lipkin model

2012 ◽  
Vol 85 (4) ◽  
Author(s):  
Zi-Gang Yuan ◽  
Ping Zhang ◽  
Shu-Shen Li ◽  
Jian Jing ◽  
Ling-Bao Kong
Keyword(s):  
Phase Transition ◽  
Excited State ◽  
Quantum Phase Transition ◽  
Berry Phase ◽  
Quantum Phase ◽  
Lipkin Model

scholarly journals Decoherence as a signature of an excited-state quantum phase transition

2008 ◽  
Vol 78 (6) ◽  
Author(s):  
A. Relaño ◽  
J. M. Arias ◽  
J. Dukelsky ◽  
J. E. García-Ramos ◽  
P. Pérez-Fernández
Keyword(s):  
Phase Transition ◽  
Excited State ◽  
Quantum Phase Transition ◽  
Quantum Phase

scholarly journals Quasiclassical approach to quantum quench dynamics in the presence of an excited-state quantum phase transition

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Michal Kloc ◽  
Daniel Šimsa ◽  
Filip Hanák ◽  
Petra Ruth Kaprálová-Žďánská ◽  
Pavel Stránský ◽  
...  
Keyword(s):  
Phase Transition ◽  
Excited State ◽  
Quantum Phase Transition ◽  
Quantum Phase ◽  
Quantum Quench ◽  
Quench Dynamics

scholarly journals Entanglement Entropy and Quantum Phase Transition in the O(N) σ-model

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Jiunn-Wei Chen ◽  
Shou-Huang Dai ◽  
Jin-Yi Pang
Keyword(s):  
Phase Transition ◽  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Quantum Phase Transition ◽  
Entanglement Entropy ◽  
Quantum Phase ◽  
Leading Order ◽  
Coupling Constant ◽  
Area Law ◽  
Conformal Scalar Field

Abstract We investigate how entanglement entropy behaves in a non-conformal scalar field system with a quantum phase transition, by the replica method. We study the σ-model in 3+1 dimensions which is O(N) symmetric as the mass squared parameter μ2 is positive, and undergoes spontaneous symmetry breaking while μ2 becomes negative. The area law leading divergence of the entanglement entropy is preserved in both of the symmetric and the broken phases. The spontaneous symmetry breaking changes the subleading divergence from log to log squared, due to the cubic interaction on the cone. At the leading order of the coupling constant expansion, the entanglement entropy reaches a cusped maximum at the quantum phase transition point μ2 = 0, and decreases while μ2 is tuned away from 0 into either phase.

scholarly journals Parity-symmetry-breaking quantum phase transition via parametric drive in a cavity magnonic system

2021 ◽  
Vol 104 (6) ◽  
Author(s):  
Guo-Qiang Zhang ◽  
Zhen Chen ◽  
Wei Xiong ◽  
Chi-Hang Lam ◽  
J. Q. You
Keyword(s):  
Phase Transition ◽  
Symmetry Breaking ◽  
Quantum Phase Transition ◽  
Quantum Phase ◽  
Parity Symmetry
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