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Poster Session

Poster Session III

4:00 pm – 6:00 pm, Thursday June 19 Session S00 Oregon Convention Center:, Exhibit Hall E
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Non-equilibrium dynamics of quasi-one- and two-dimensional Bose gases in an optical box

Poster 101
Presenter: Sambit Banerjee (Purdue University)
Authors: Kai Zhou (Purdue University), Hikaru Tamura (Institute of Molecular Science in Japan), Rongjie Li (Purdue University), Shiva Kant Tiwari (Purdue University), Valentin Walther (Purdue University), Chen-Lung Hung (Purdue University)

Atomic quantum gases confined in a box potential provide a versatile platform for studying non-equilibrium dynamics. In this poster, we explore different quench-induced dynamics under two scenarios. Firstly, we investigate the collapse dynamics of a quantum vortex in a two-dimensional atomic superfluid following a rapid interaction ramp from repulsion to attraction. We identify the conditions and time scales for a superfluid vortex to radially converge into a quasi-stationary vortex soliton-like density profile. Additionally, we observe emergent self-similar dynamics in the density perturbations caused by azimuthal modulational instability, leading to the eventual splitting of a solitonic ring profile or direct fragmentation of a superfluid into disordered, yet roughly circular arrays of Townes soliton-like wavepackets. Secondly, we examine the density and phase correlation dynamics in quasi-one-dimensional attractive Bose gases upon an interaction quench. Our experiment reveals an interplay between modulational instability seeded from bulk fluctuations and shockwaves emitted from an effective edge-induced dam-break. We also report on how long-range order can be re-established following an interaction quench back to the repulsive regime.

Funding acknowledgement

We acknowledge support from the NSF (PHY-1848316 and PHY-2409591), the W.M. Keck Foundation, the DOE QuantISED program (through Grant No. DESC0019202 and the consortium “Intersections of QIS and Theoretical Particle Physics” at Fermilab, and the AFOSR (FA9550-22-1-0327).

POSTERS (141)