2 papers
quant-ph2020
Quantum Phase Transition and Berry Phase in an Extended Dicke Model
C. A. Estrada Guerra, J. Mahecha-Gómez, J. G. Hirsch
We investigate quantum phase transitions, quantum criticality, and Berry phase for the ground state of an ensemble of non-interacting two-level atoms embedded in a non-linear optic…
quant-ph2018
Fock-state superradiance in a cold atomic ensemble
D. F. Barros, L. F. Muñoz-Martínez, L. Ortiz-Gutiérrez +7
A simplified theory for the wavepackets of the photons emitted during the read process of a quantum memory formed by cold atoms is provided. We arrive at analytical expressions for…