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A: Fachverband Atomphysik

A 23: Ultra-cold Atoms, Ions and BEC IV (joint session A/Q)

A 23.3: Talk

Thursday, March 9, 2023, 11:45–12:00, F303

Controlling superfluid flows using dissipative impurities — •Martin Will¹, Jamir Marino², Herwig Ott¹, and Michael Fleischhauer¹ — ¹University of Kaiserslautern-Landau, Germany — ²Johannes Gutenberg University Mainz, Germany

We propose and analyze a protocol to create and control the superfluid flow in a one dimensional, weakly interacting Bose gas by noisy point contacts. Considering first a single contact in a static or moving condensate, we identify three different dynamical regimes: I. a linear response regime, where the noise induces a coherent flow in proportion to the strength of the noise, II. a Zeno regime with suppressed currents, and III. a regime of continuous soliton emission. Generalizing to two point contacts in a condensate at rest we show that noise tuning can be employed to control or stabilize the superfluid transport of particles along the segment which connects them.