Freiburg 2024 – scientific programme

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A: Fachverband Atomphysik

A 33: Poster VI

A 33.22: Poster

Thursday, March 14, 2024, 17:00–19:00, Tent A

Momentum induced tunneling of Bose-Einstein Condensates — •Daida Thomas¹, Knut Stolzenberg¹, Dustin Lindberg², Sebastian Bode¹, Denys Bondar², Ernst M Rasel¹, Naceur Gaaloul¹, and Dennis Schlippert¹ — ¹Leibniz Universität Hannover, Institut für Quantenoptik, Welfengarten 1, 30167 Hannover — ²Tulane University, 6823 St. Charles Avenue, New Orleans, LA 70118

Quantum tunneling of BEC’s in a double well potential has been explored in the realm of entanglement generation and Josephson tunneling. Traditional approaches for creating a double well mostly involved inserting barriers in a single well leading to the creation of a double-well system. We accelerate atoms towards a barrier in a double-well system, inducing momentum driven tunneling and envision testing our technique with asymmetric barriers. This is done in optical dipole traps, incorporating acousto-optical deflectors, thereby allowing versatile control over the trapping potentials with respect to position and trap depth. The sample used is a ⁸⁷Rb Bose-Einstein condensate, prepared in a magnetically insensitive state, with a sample size of up to 300×10³ atoms. We report on preliminary implementation prospects of tunneling to study the preferential tunneling direction of BEC’s and quantum correlations stemming from the nonlinear dynamics of atomic interactions.

Keywords: Quantum tunneling; Double well; BEC