103 citations · 375 across the 13 of their papers we have counts for
13 papers
Excited-State Quantum Phase Transitions in the Anharmonic Lipkin-Meshkov-Glick Model: Dynamical Aspects
Jamil Khalouf-Rivera, Juan Gamito, Francisco Pérez-Bernal +2
The standard Lipkin-Meshkov-Glick (LMG) model undergoes a second-order ground-state quantum phase transition (QPT) and an excited-state quantum phase transition (ESQPT). The inclus…
Digital quantum simulation of an extended Agassi model: Using machine learning to disentangle its phase-diagram
Álvaro Sáiz, José-Enrique García-Ramos, José Miguel Arias +2
A digital quantum simulation for the extended Agassi model is proposed using a quantum platform with eight trapped ions. The extended Agassi model is an analytically solvable model…
Excited-State Quantum Phase Transitions in the Anharmonic Lipkin-Meshkov-Glick Model I: Static Aspects
Juan Gamito, Jamil Khalouf-Rivera, J. Miguel Arias +2
The basic Lipkin-Meshkov-Glick model displays a second order ground state quantum phase transition and an excited state quantum phase transition (ESQPT). The inclusion of an anharm…
Entropies and IPR as Markers for a Phase Transition in a Two-Level Model for Atom-Diatomic Molecule Coexistence
Ignacio Baena, Pedro Pérez-Fernández, Manuela Rodríguez-Gallardo +1
A Quantum Phase Transition (QPT) in a simple model that describes the coexistence of atoms and diatomic molecules is studied. The model, that is briefly discussed, presents a secon…
A digital quantum simulation of the Agassi model
Pedro Pérez-Fernández, José Miguel Arias, José Enrique García-Ramos +1
A digital quantum simulation of the Agassi model from nuclear physics is proposed and analyzed. The proposal is worked out for the case with four different sites. Numerical simulat…
Two-neutron transfer reactions as a tool to study the interplay between shape coexistence and quantum phase transitions
J. E. García-Ramos, J. M. Arias, A. Vitturi
The goal of this study is to find an observable that could distinguish between both phenomena, shape coexistence and quantum phase transitions. The selected observable to be analyz…
Excited-state quantum phase transitions in a two-fluid Lipkin model
J. E. Garcia-Ramos, P. Perez-Fernandez, J. M. Arias
Background: Composed systems have became of great interest in the framework of the ground state quantum phase transitions (QPTs) and many of their properties have been studied in d…
Phase diagram of the two-fluid Lipkin model: a butterfly catastrophe
J. E. García-Ramos, P. Pérez-Fernandez, J. M Arias +1
Background: In the last few decades quantum phase transitions have been of great interest in Nuclear Physics. In this context, two-fluid algebraic models are ideal systems to study…
Quantum phase transitions of atom-molecule Bose mixtures in a double-well potential
Armando Relaño, Jorge Dukelsky, Pedro Perez-Fernandez +1
The ground state and spectral properties of Bose gases in double-well potentials are studied in two different scenarios: i) an interacting atomic Bose gas, and ii) a mixture of an…
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…
Relationship between X(5)-models and the interacting boson model
J. Barea, J. M. Arias, J. E. García-Ramos
The connections between the X(5)-models (the original X(5) using an infinite square well, X(5)-, X(5)-, X(5)-, and X(5)-), based on particular solutions of the…
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…