17 citations · 18 across the 3 of their papers we have counts for
3 papers
Degeneracy beyond the parity-symmetry protection in the Lipkin-Meshkov-Glick model
Jamil Khalouf-Rivera, Miguel Carvajal, Francisco Pérez-Bernal
Degeneracy patterns in quantum mechanics stem from the system symmetries. In particular, the broken-symmetry phase in the well-known Lipkin-Meshkov-Glick (LMG) model is composed of…
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…
Anharmonicity-induced excited-state quantum phase transition in the symmetric phase of the two-dimensional limit of the vibron model
Jamil Khalouf-Rivera, Francisco Pérez-Bernal, Miguel Carvajal
In most cases, excited state quantum phase transitions can be associated with the existence of critical points (local extrema or saddle points) in a system's classical limit energy…