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AMO/QO PIZZA SEMINAR


"Noise reduction and generation of squeezed light by cascading double-cavity optomechanical systems"


Dr. Fuli Li
Xi'an Jiaotong University, Xi'an 710049, China

ABSTRACT 

Noise reduction and generation of two-mode broadband squeezed light is investigated by cascading double-cavity optomechanical systems. The cavities are driven by amplitude-modulated lasers with two frequency tones, one of which is red-detuning and other blue-detuning from the cavity fields. It is shown that a two-mode squeezed field can be generated in a single double-cavity system via dissipation of the mechanical resonator. To further reduce thermal and input noises and generate strong squeezing of the cavity fields, we connect many identical double-cavity optomechanical systems together in a cascading way. The vacuum noise fed into the cavities and the thermal noise coupled to the mechanical resonator can be greatly depressed in the cascading system. As a result, the very strong and constant squeezing can be achieved in a large region of frequency in the cascaded optomechanical systems.

References 1. Zhen Li, Sheng-li Ma, and Fu-li Li, Phys. Rev. A92, 023856(2015); 2. W. P. He and F. L. Li, Phys. Rev. A 76, 012328 (2007); 3. D. Wang, Y. Zhang and M. Xiao, Phys. Rev. A 87, 023834 (2013); 4. Z. Yan, X. Jia, X. Su, Z. Duan, C. D. Xie and K. C. Peng, Phys. Rev. A 85, 040305 (2012)



Tuesday, August 9, 2016
IQSE 578, 12:30 Noon
Mitchell Physics Building


Institute for Quantum Science and Engineering
Texas A&M University

(Pizza, salad, and soda to be served at 12:00 noon)