Coherent macroscopic quantum tunneling in boson-fermion mixtures

Details Coherent macroscopic quantum tunneling in boson-fermion mixtures Coherent macroscopic quantum tunneling in boson-fermion mixtures

2007-04-04

arxiv.org/abs/0704.0650v1

Phys. Rev. A 76, 051601(R) (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevA.76.051601

We show that the cold atom systems of simultaneously trapped Bose-Einstein condensates (BEC's) and quantum degenerate fermionic atoms provide promising laboratories for the study of macroscopic quantum tunneling. Our theoretical studies reveal that the spatial extent of a small trapped BEC immersed in a Fermi sea can tunnel and coherently oscillate between the values of the separated and mixed configurations (the phases of the phase separation transition of BEC-fermion systems). We evaluate the period, amplitude and dissipation rate for $^{23}$Na and $^{40}$K-atoms and we discuss the experimental prospects for observing this phenomenon.

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