61 citations · 547 across the 49 of their papers we have counts for
4 papers · 1 filter
Fidelity, susceptibility and critical exponents in the Dicke model
M. A. Bastarrachea-Magnani, O. Castaños, E. Nahmad-Achar +2
We calculate numerically the fidelity and its susceptibility for the ground state of the Dicke model. A minimum in the fidelity identifies the critical value of the interaction whe…
Quantum and classical capacity boosted by a Lorentz transformation
Kamil Bradler, Esteban Castro-Ruiz, Eduardo Nahmad-Achar
In this paper we show that the quantum channel between two inertial observers who transmit quantum information by sending realistic photonic wave packets is a well-studied channel…
A semi-classical versus quantum description of the ground state of three-level atoms interacting with a one-mode electromagnetic field
S. Cordero, O. Castaños, R. López-Peña +1
We consider three-level atoms (or systems) interacting with a one-mode electromagnetic field in the dipolar and rotating wave approximations. The order of the quantum phase t…
Quantum phase transitions of three-level atoms interacting with a one-mode electromagnetic field
Sergio Cordero, Ramón López-Peña, Octavio Castaños +1
We apply the energy surface method to study a system of Na three-level atoms interacting with a one-mode radiation field in the Ξ, Λand V configurations. We obtain an estimation of…