Condensed Matter Theory
Martin Esmann et.al.: Fractional photon-assisted tunnelling of ultra-cold atoms in periodically shaken double-well lattices
- Author(s): Martin Esmann, Jonathan D. Pritchard, Christoph Weiss
- Title: Fractional photon-assisted tunnelling of ultra-cold atoms in periodically shaken double-well lattices
- Date of Upload: 2012-07-11
- Article: Laser Physics Letters, vol. 9, issue 2, pp. 160-168, WILEY-VCH Verlag GmbH & Co. KGaA
- Keywords: double-well lattice, photon-assisted tunnelling, ultra-cold atoms
- PACS: 03.75.Lm, 37.10.Jk, 05.60.Gg
- Abstract:
- Fractional photon-assisted tunnelling is investigated both numerically and analytically in a double-well lattice. While integer photon-assisted tunnelling is a single-particle effect, fractional photon-assisted tunnelling is an interaction-induced many-body effect. Double-well lattices with few particles in each double well are ideal to study this effect far from the mean-field effects. It is predicted that the 1/4-resonance is observable in such systems. Fractional photon-assisted tunnelling provides a physically relevant model for which N-th order time-dependent perturbation theory can be large although all previous orders are small.
- URL: http://arxiv.org/abs/1109.2735 (text/plain)
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