Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session C07: Dynamics of Cold Atoms in Optical Lattices I
10:30 AM–12:30 PM,
Tuesday, June 1, 2021
Chair: Han Pu, Rice University
Abstract: C07.00009 : NOON states with ultracold bosonic atoms via resonance- and chaos-assisted tunneling*
12:06 PM–12:18 PM
Live
Presenter:
Guillaume Vanhaele
(University of Liège)
Authors:
Guillaume Vanhaele
(University of Liège)
Peter Schlagheck
(University of Liège)
|N, 0> + |0, N> superposition with N ∼ 5 particles, via collective tunneling of interacting ultracold bosonic
atoms within a symmetric double-well potential in the self-trapping regime. We show that a periodic driving
of the double well with suitably tuned amplitude and frequency parameters allows one to substantially boost this
tunneling process without altering its collective character. The timescale to generate the NOON superposition,
which corresponds to half the tunneling time and would be prohibitively large in the undriven double well for
the atomic populations considered, can thereby be drastically reduced, which renders the realization of NOON
states through this protocol experimentally feasible. Resonance- and chaos-assisted tunneling are identified as
key mechanisms in this context. A quantitative semiclassical evaluation of their impact on the collective tunneling
process allows one to determine the optimal choice for the driving parameters in order to generate those NOON
states as fast as possible.
*Financial support from the Belgian F.R.S.-FNRS (FNRS aspirant grant for G.V.) is gratefully acknowledged.
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