43 citations · 208 across the 15 of their papers we have counts for
15 papers
Unifying Finite-Temperature Dynamical and Excited-State Quantum Phase Transitions
Ángel L. Corps, Armando Relaño, Jad C. Halimeh
In recent years, various notions of dynamical phase transitions have emerged to describe far-from-equilibrium criticality. A unifying framework connecting these different concepts…
Constants of motion characterizing continuous symmetry-broken phases
Ángel L. Corps, Jorge Dukelsky, Armando Relaño
We present a theory characterizing the phases emerging as a consequence of continuous symmetry-breaking in quantum and classical systems. In symmetry-breaking phases, dynamics is r…
Relaxation time as a control parameter for exploring dynamical phase diagrams
Ángel L. Corps, Pedro Pérez-Fernández, Armando Relaño
We explore a full dynamical phase diagram by means of a double quench protocol that depends on a relaxation time as the only control parameter. The protocol comprises two fixed que…
General theory for discrete symmetry-breaking equilibrium states
Ángel L. Corps, Armando Relaño
Spontaneous symmetry-breaking in phase transitions occurs when the system Hamiltonian is symmetric under a certain transformation, but the equilibrium states observed in nature are…
Experimental observation of phase transitions of a deformed Dicke model using a reconfigurable, bi-parametric electronic platform
Mario A. Quiroz-Juarez, Ángel L. Corps, Rafael A. Molina +4
We experimentally study the infinite-size limit of the Dicke model of quantum optics with a parity-breaking deformation strength that couples the system to an external bosonic rese…
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…
Chaos in a deformed Dicke model
Ángel L. Corps, Rafael A. Molina, Armando Relaño
The critical behavior in an important class of excited state quantum phase transitions is signaled by the presence of a new constant of motion only at one side of the critical ener…
Constant of motion identifying excited-state quantum phases
Ángel L. Corps, Armando Relaño
We propose that a broad class of excited-state quantum phase transitions (ESQPTs) gives rise to two different excited-state quantum phases. These phases are identified by means of…
Distribution of the Ratio of Consecutive Level Spacings for Different Symmetries and Degrees of Chaos
A. L. Corps, A. Relaño
Theoretical expressions for the distribution of the ratio of consecutive level spacings for quantum systems with transiting dynamics remain unknown. We propose a family of one-para…
Stringent Test on Power Spectrum of Quantum Integrable and Chaotic Systems
A. L. Corps, A. Relaño
Quantum chaotic and integrable systems are known to exhibit a characteristic and noise, respectively, in the power spectrum associated to their spectral fluctuation…