Séminaire exceptionnel du LPTMS : Sandro Stringari (Pitaevskii BEC Center, Universita di Trento)

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29/02/2024    
14:00 - 15:30

Petit amphi, bâtiment Pascal n° 530
rue André Rivière, Orsay, 91405

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Propagation of sound in density modulated superfluids

Sandro Stringari (Pitaevskii BEC Center, Universita di Trento)

 I will discuss the propagation of sound in superfluid quantum gases breaking translational invariance. I will consider both the case of a quantum  gas subject to an external periodic potential and the case where translational symmetry is broken in a spontaneous way, giving rise to supersolidity. The role of the superfluid density in determining the sound velocity at zero temperature is explicitly pointed out in  both cases. 

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