139 citations · 1.4k across the 50 of their papers we have counts for
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Quantum quench influenced by an excited-state phase transition
P. Perez-Fernandez, P. Cejnar, J. M. Arias +3
We analyze excited-state quantum phase transitions (ESQPTs) in three schematic (integrable and nonintegrable) models describing a single-mode bosonic field coupled to a collection…
Decoherence due to an excited state quantum phase transition in a two-level boson model
P. Perez-Fernandez, A. Relano, J. M. Arias +2
The decoherence induced on a single qubit by its interaction with the environment is studied. The environment is modelled as a scalar two-level boson system that can go through eit…
Decoherence as a signature of an excited state quantum phase transition
A. Relano, J. M. Arias, J. Dukelsky +2
We analyze the decoherence induced on a single qubit by the interaction with a two-level boson system with critical internal dynamics. We explore how the decoherence process is aff…