Condensate Formation in a Dark State of a Driven Atom-Cavity System

We demonstrate the formation of a condensate in a dark state of momentum states, in a pumped and shaken cavity-BEC system. The system consists of an ultracold quantum gas in a high-finesse cavity, which is pumped transversely by a phase-modulated laser. This phase-modulated pumping couples the atomi...

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Published in:Physical review letters 2023-04, Vol.130 (16), p.163603-163603, Article 163603
Main Authors: Skulte, Jim, Kongkhambut, Phatthamon, Rao, Sahana, Mathey, Ludwig, Keßler, Hans, Hemmerich, Andreas, Cosme, Jayson G
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container_issue 16
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description We demonstrate the formation of a condensate in a dark state of momentum states, in a pumped and shaken cavity-BEC system. The system consists of an ultracold quantum gas in a high-finesse cavity, which is pumped transversely by a phase-modulated laser. This phase-modulated pumping couples the atomic ground state to a superposition of excited momentum states, which decouples from the cavity field. We demonstrate how to achieve condensation in this state, supported by time-of-flight and photon emission measurements. With this, we show that the dark state concept provides a general approach to efficiently prepare complex many-body states in an open quantum system.
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title Condensate Formation in a Dark State of a Driven Atom-Cavity System
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