WEBINAR ANNOUNCEMENT: “Observation of a Bilayer Superfluid with Interlayer Coherence”
- https://fa.upc.edu/es/eventos/webinar-announcement-observation-of-a-bilayer-superfluid-with-interlayer-coherence
- WEBINAR ANNOUNCEMENT: “Observation of a Bilayer Superfluid with Interlayer Coherence”
- 2024-11-14T12:00:00+01:00
- 2024-11-14T14:00:00+01:00
14/11/2024 de 12:00 a 14:00 (Europe/Madrid / UTC100)
UPC campus nord, B4-212 (aula seminari)
Erik Rydow
Clarendon Laboratory, University of Oxford, United Kingdom
“Observation of a Bilayer Superfluid with Interlayer Coherence”
https://meet.google.com/whq-mkve-aja
Abstract
Controlling the coupling between different degrees of freedom in many-body systems is a powerful technique for engineering novel phases of matter. We create a bilayer system of two-dimensional (2D) ultracold Bose gases and demonstrate the controlled generation of bulk coherence through tunable interlayer Josephson coupling. We probe the resulting correlated phases using matter-wave interferometry, measuring both the symmetric and antisymmetric phase modes of the bilayer system. These modes exhibit a crossover from short-range to quasi-long-range order above a coupling-dependent critical point, providing direct evidence of bilayer superfluidity mediated by interlayer coupling. We map out the phase diagram and interpret it with renormalization-group theory and Monte Carlo simulations. Additionally, we elucidate the underlying mechanism through the observation of suppressed vortex excitations in the antisymmetric mode..
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