scholarly journals Classification of excited-state quantum phase transitions for arbitrary number of degrees of freedom

2016 ◽  
Vol 380 (34) ◽  
pp. 2637-2643 ◽  
Author(s):  
Pavel Stránský ◽  
Pavel Cejnar
Keyword(s):  
Phase Transitions ◽  
Excited State ◽  
Arbitrary Number ◽  
Degrees Of Freedom ◽  
Quantum Phase Transitions ◽  
Quantum Phase

scholarly journals Observation of Dynamical Quantum Phase Transitions with Correspondence in an Excited State Phase Diagram

2020 ◽  
Vol 124 (4) ◽  
Author(s):  
T. Tian ◽  
H.-X. Yang ◽  
L.-Y. Qiu ◽  
H.-Y. Liang ◽  
Y.-B. Yang ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Phase Transitions ◽  
Excited State ◽  
Quantum Phase Transitions ◽  
Quantum Phase

scholarly journals Quantum fidelity susceptibility in excited state quantum phase transitions: application to the bending spectra of nonrigid molecules

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Jamil Khalouf-Rivera ◽  
Miguel Carvajal ◽  
Francisco Perez-Bernal
Keyword(s):  
Phase Transitions ◽  
Excited State ◽  
Molecular Species ◽  
Quantum Phase Transitions ◽  
Quantum Phase ◽  
The Other ◽  
Two Dimensional ◽  
Nonrigid Molecules ◽  
Bending Modes ◽  
Quantum Fidelity

We characterize excited state quantum phase transitions in the two dimensional limit of the vibron model with the quantum fidelity susceptibility, comparing the obtained results with the information provided by the participation ratio. As an application, we locate the eigenstate closest to the barrier to linearity and determine the linear or bent character of the different overtones for particular bending modes of six molecular species. We perform a fit and use the optimized eigenvalues and eigenstates in three cases and make use of recently published results for the other three cases.

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