scholarly journals Critical Behavior of the Energy Gap and Its Relation with the Berry Phase Close to the Excited State Quantum Phase Transition in the Lipkin Model

2015 ◽  
Vol 32 (6) ◽  
pp. 060301 ◽  
Author(s):  
Zi-Gang Yuan ◽  
Ping Zhang
Keyword(s):  
Phase Transition ◽  
Excited State ◽  
Quantum Phase Transition ◽  
Critical Behavior ◽  
Energy Gap ◽  
Berry Phase ◽  
Quantum Phase ◽  
Lipkin Model

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

ELECTRONIC STRUCTURE AND QUANTUM PHASE TRANSITION IN MULTI-WALL CARBON NANOTUBES

2007 ◽  
Vol 21 (25) ◽  
pp. 4377-4386 ◽  
Author(s):  
SHI-DONG LIANG
Keyword(s):  
Phase Transition ◽  
Carbon Nanotubes ◽  
Electronic Structure ◽  
Quantum Phase Transition ◽  
Essential Role ◽  
Energy Gap ◽  
Tight Binding ◽  
Quantum Phase ◽  
Multi Wall Carbon Nanotubes ◽  
Structure Characteristics

The electronic structure of the multi-wall carbon nanotubes (MWCN) is studied theoretically by the tight-binding approach. The interwall coupling between layers plays an essential role in the electronic structure. With an increase of the interwall coupling, the energy gap of the semiconducting MWCNs will decrease and eventually vanish, giving rise to the semiconductor–metal quantum phase transition. The metallic layer in the MWCN dominates the electronic structure characteristics near the Fermi level (gapless).

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
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