ACTA

Tunable Second-Order Sideband Effects Based on Dual-Species BEC-Optomechanical Systems

Li-Wei Liu^{a, b}, Guo-Heng Zhang^a, Xiang-Li Wang^a, Xiu-Jia An^a, Hai-Yan Jiao^a
^aCollege of Electrical Engineering, Northwest Minzu University, Lanzhou 730000, China
^bKey Laboratory for Electronic Materials of the State Ethnic Affairs Commission of PRC, Northwest Minzu University, Lanzhou 730000, China

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We theoretically investigate a second-order optomechanically induced transparency process of a cigar-shaped dual-species Bose-Einstein condensate with nonlinear collisions trapped inside an optomechanical cavity. We find that atomic collisions provide linear couplings, which facilitate the mechanical mixing of the dual-species Bose-Einstein condensate. We derive analytical expressions of the output transmission intensity of the probe field and the dimensionless amplitude of the second-order sideband. The numerical results show that the transmission intensity and the dimensionless amplitude of the second-order sideband can be controlled by the control field intensities, the effective detuning, and the effective coupling strength of the Bogoliubov mode of the dual-species Bose-Einstein condensate and optical mode. Furthermore, the interspecies and intraspecies interactions are also used to control the transmission intensity and the dimensionless amplitude of the second-order sideband.

DOI:10.12693/APhysPolA.143.89
topics: cavity optomechanical system, dual-species Bose-Einstein condensate, second-order sideband