Coherent control of a self-trapped Bose-Einstein condensate

TL;DR

This paper explores how to induce and control self-trapping in a Bose-Einstein condensate within an optical lattice, enabling coherent manipulation of entangled bosonic states for quantum technology applications.

Contribution

It demonstrates a method to induce self-trapping and coherently control boson emission using periodic driving, advancing quantum state manipulation in condensates.

Findings

Self-trapping can be induced by increasing atom number or interaction strength.

Periodic driving enables coherent control of boson emission.

Formation of entangled bosonic states for quantum information processing.

Abstract

We study the behavior of a Bose-Einstein condensate held in an optical lattice. We first show how a self-trapping transition can be induced in the system by either increasing the number of atoms occupying a lattice site, or by raising the interaction strength above a critical value. We then investigate how applying a periodic driving potential to the self-trapped state can be used to coherently control the emission of a precise number of correlated bosons from the trapping-site. This allows the formation and transport of entangled bosonic states, which are of great relevance to novel technologies such as quantum information processing.