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Physics World

First continuous condensate created

Tim Wogan

Published Sep 1, 2022• 0 citations
Publisher

Abstract

A new Bose–Einstein condensate cooling technique has been shown to reduce atom losses and could open the door to continuous-wave atom lasers, as Tim Wogan reports.
DOI
10.1088/2058-7058/35/08/05

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Quantum degenerate atomic gases are prominent platforms for quantum simulation and high precision sensing. A key challenge for these applications is intrinsic atom loss, which limits quantum gas lifetimes to typically tens of seconds. Here we create a Bose-Einstein condensate of 84Sr^{84}\mathrm{Sr}84Sr atoms that is sustained in steady state for minutes. We achieve this by guiding a continuous stream of Sr gas through a sequence of spatially separated laser cooling stages, until it reaches the condensate's location, which we protect against harmful laser cooling photons. This steady-state quantum degenerate gas paves the way to design and study novel driven-dissipative, non-equilibrium quantum systems, and overcomes a key bottleneck in the realization of a continuous-wave atom laser.