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Published on: March 30, 2017
Dissipative Double-Well Potential for Cold Atoms: Kramers Rate and Stochastic Resonance
Ion Stroescu1, David B Hume1, Markus K Oberthaler1
1Kirchhoff-Institute for Physics, University of Heidelberg, INF 227, 69120 Heidelberg, Germany.
Abstract:
We experimentally study particle exchange in a dissipative double-well potential using laser-cooled atoms in a hybrid trap. We measure the particle hopping rate as a function of barrier height, temperature, and atom number. Single-particle resolution allows us to measure rates over more than 4 orders of magnitude and distinguish the effects of loss and hopping. Deviations from the Arrhenius-law scaling at high barrier heights occur due to cold collisions between atoms within a well. By driving the system periodically, we characterize the phenomenon of stochastic resonance in the system response.
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