43 citations · 208 across the 15 of their papers we have counts for
6 papers · 1 filter
Mechanism of dynamical phase transitions: The complex-time survival amplitude
Ángel L. Corps, Pavel Stránský, Pavel Cejnar
Dynamical phase transitions are defined through non-analyticities of the survival probability of an out-of-equilibrium time-evolving state at certain critical times. They ensue fro…
Comment on 'Revisiting the phase transitions of the Dicke model'
Ángel L. Corps, Armando Relaño
In the work of Das and Sharma [Phys. Rev. A 105, 033716 (2022)] the phase transitions of the Dicke model are studied. Its main result is that, besides the well-known quantum phase…
Dynamical and excited-state quantum phase transitions in collective systems
Ángel L. Corps, Armando Relaño
We study dynamical phase transitions (DPTs) in quantum many-body systems with infinite-range interaction, and present a theory connecting the two kinds of known DPTs (sometimes ref…
Theory of dynamical phase transitions in quantum systems with symmetry-breaking eigenstates
Ángel L. Corps, Armando Relaño
We present a theory for the two kinds of dynamical quantum phase transitions, termed DPT-I and DPT-II, based on a minimal set of symmetry assumptions. In the special case of collec…
Exceptional Spectral Phase in a Dissipative Collective Spin Model
Álvaro Rubio-García, Ángel L. Corps, Armando Relaño +4
We study a model of a quantum collective spin weakly coupled to a spin-polarized Markovian environment and find that the spectrum is divided into two regions that we name normal an…
Energy cat states induced by a parity-breaking excited-state quantum phase transition
Ángel L. Corps, Armando Relaño
We show that excited-state quantum phase transitions (ESQPTs) in a system in which the parity symmetry is broken can be used to engineer an energy-cat state -- a Schrödinger cat st…