scholarly journals Characterizing Adiabaticity in Quantum Many‐Body Systems at Finite Temperature

2020 ◽  
Vol 3 (7) ◽  
pp. 1900139
Author(s):  
Amy H. Skelt ◽  
Irene D'Amico
Keyword(s):  
Finite Temperature ◽  
Many Body ◽  
Many Body Systems

Single-Particle Self-Energy in Many-Body Systems at Finite Temperature

2000 ◽  
Vol 283 (2) ◽  
pp. 308-333 ◽  
Author(s):  
N. Giovanardi ◽  
P. Donati ◽  
P.F. Bortignon ◽  
R.A. Broglia
Keyword(s):  
Single Particle ◽  
Finite Temperature ◽  
Many Body ◽  
Self Energy ◽  
Many Body Systems

FINITE TEMPERATURE APPROACH TO QUANTUM PHASE TRANSITIONS

2010 ◽  
Vol 20 (02) ◽  
pp. 397-401
Author(s):  
A. PLASTINO ◽  
E. M. F. CURADO
Keyword(s):  
Phase Transitions ◽  
Statistical Mechanics ◽  
Excited States ◽  
Finite Temperature ◽  
Quantum Phase Transitions ◽  
Quantum Phase ◽  
Many Body ◽  
Statistical Correlations ◽  
Many Body Systems

We show how ordinary, finite-temperature tools of Statistical Mechanics can be used to detect quantum phase transitions in many-body systems. In particular, statistical correlations exhibit a quite idiosyncratic behavior at the critical interaction-strengths. Moreover, what one may call "soft quantum phase-transitions" (crossings of excited states) are characterized by the rather special way of vanishing that these correlations adopt.

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