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Nonlinearity enhancement in optomechnical system

The nonlinearity is an important feature in the field of optomechanics. Employing atomic coherence, we put forward a scheme to enhance the nonlinearity of the cavity optomechanical system. The effective Hamiltonian is derived, which shows that the nonlinear strength can be enhanced by increasing the number of atoms at certain range of parameters. We also numerically study the nonlinearity enhancement beyond the effective Hamiltonian. Furthermore, we investigate the potential usage of the nonlinearity in performing quantum nondemolition (QND) measurement of the bosonic modes. Our results show that the present system exhibits synchronization, and the nonlinear effects provide us an effective method in performing QND.

preprint2014arXivOpen access
Ling ZhouJiong ChengYan HanWeiping Zhang
quant-ph
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Open access4 authors1 topic
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Ling ZhouJiong ChengYan HanWeiping Zhang

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