R. K. Shrestha, J. Ni, W. K. Lam, G. S. Summy, S. Wimberger
We report measurements of dynamical tunneling rates of a Bose-Einstein condensate across a barrier in classical phase space. The atoms are initially prepared in quantum states which extend over a classically regular island region. Our experimental data is supported by numerical simulations taking into account imperfections mainly from spontaneous emission. Furthermore we predict experimentally accessible parameter ranges over which direct tunneling could be readily observed if spontaneous emission is further suppressed.
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http://arxiv.org/abs/1305.1828
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