Tunneling in a cavity

Details Tunneling in a cavity Tunneling in a cavity

1996-09-11

arxiv.org/abs/cond-mat/9609103v1

Physics

Condensed Matter

4 pages Revtex, 2 PS-figures, appears in The Physical Review A

Scientific paper

10.1103/PhysRevA.54.5323

The mechanism of coherent destruction of tunneling found by Grossmann et al. [Phys. Rev. Lett. 67, 516 (1991)] is studied from the viewpoint of quantum optics by considering the photon statistics of a single mode cavity field which is strongly coupled to a two-level tunneling system (TS). As a function of the interaction time between TS and cavity the photon statistics displays the tunneling dynamics. In the semi-classical limit of high photon occupation number $n$, coherent destruction of tunneling is exhibited in a slowing down of an amplitude modulation for certain parameter ratios of the field. The phenomenon is explained as arising from interference between displaced number states in phase space which survives the large $n$ limit due to identical $n^{-1/2}$ scaling between orbit width and displacement.

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