Probing two-particle exchange processes in two-mode Bose-Einstein condensates
Quantum Gases
2017-03-29 v2
Abstract
We study the fidelity decay and its freeze for an initial coherent state of two-mode Bose-Einstein condensates in the Fock regime considering a Bose-Hubbard model that includes two-particle tunneling terms. By using linear-response theory we find scaling properties of the fidelity as a function of the particle number that prove the existence of two-particle mode-exchange when a non-degeneracy condition is fulfilled. Tuning the energy difference of the two modes serves to distinguish the presence of two-particle mode-exchange terms through the appearance of certain singularities. Numerical results confirm our findings. Experimental verification of our findings could improve cold atom interferometry.
Cite
@article{arxiv.1504.05441,
title = {Probing two-particle exchange processes in two-mode Bose-Einstein condensates},
author = {Luis Benet and Diego Espitia and Daniel Sahagún},
journal= {arXiv preprint arXiv:1504.05441},
year = {2017}
}