Coherent control of mesoscopic tunneling in a Bose-Einstein condensate

TL;DR

This paper demonstrates how time-dependent modulation of a double-well potential can control tunneling in a Bose-Einstein condensate, enabling transfer and entanglement generation.

Contribution

It introduces a method for controlling mesoscopic tunneling and entanglement in BECs using dynamic potential modulation, which was not previously demonstrated.

Findings

Controlled transfer of condensate between wells

Generation of mesoscopic entangled states

Numerical validation of modulation effectiveness

Abstract

For a weakly interacting Bose-Einstein condensate in a double well, an appropriate time-dependent modulation of the trapping potential counter-acts the "self-trapping" effects of the interactions, thereby allowing tunneling between the wells. It is demonstrated numerically that this modulation can be employed for transferring the condensate from one well to the other in a controlled way. Moreover it allows the production of mesoscopic entangled states on short time scales.