Control of the Bose-Einstein condensate by dissipation. Nonlinear Zeno effect

TL;DR

This paper demonstrates how controlled dissipation can be used to manipulate Bose-Einstein condensates, enabling phenomena like loss suppression and the nonlinear Zeno effect, with applications in state creation and quantum regime switching.

Contribution

It introduces a method to control BECs using dissipation, revealing new ways to manage quantum states and observe the nonlinear Zeno effect in a boson-Josephson junction.

Findings

Observation of loss suppression in BECs

Demonstration of the nonlinear Zeno effect

Controlled dissipation enables quantum state management

Abstract

We show that controlled dissipation can be used as a tool for exploring fundamental phenomena and managing mesoscopic systems of cold atoms and Bose-Einstein condensates. Even the simplest boson-Josephson junction, that is, a Bose-Einstein condensate in a double-well trap, subjected to removal of atoms from one of the two potential minima allows one to observe such phenomena as the suppression of losses and the nonlinear Zeno effect. In such a system the controlled dissipation can be used to create desired macroscopic states and implement controlled switching among different quantum regimes.