Wednesday, March 13, 2013

1303.2977 (D. Nagy et al.)

Cavity optomechanics with a trapped, interacting Bose-Einstein
condensate
   [PDF]

D. Nagy, G. Szirmai, P. Domokos
The dispersive interaction of a Bose-Einstein condensate with a single mode of a high-finesse optical cavity realizes the radiation pressure coupling Hamiltonian. In this system the role of the mechanical oscillator is played by a single condensate excitation mode that is selected by the cavity mode function. We study the effect of atomic s-wave collisions and show that it merely renormalizes parameters of the usual optomechanical interaction. Moreover, we show that even in the case of strong harmonic confinement---which invalidates the use of Bloch states---a single excitation mode of the Bose-Einstein condensate couples significantly to the light field, that is the simplified picture of a single "mechanical" oscillator mode remains valid.
View original: http://arxiv.org/abs/1303.2977

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