Bistability and squeezing of the librational mode of an optically trapped nanoparticle

Ke-Wen Xiao, Nan Zhao, and Zhang-qi Yin
Phys. Rev. A 96, 013837 – Published 19 July 2017

Abstract

We systematically investigate the bistable behavior and squeezing property of the librational mode of a levitated nonspherical nanoparticle trapped by laser beams. By expanding the librational potential to the fourth order of the librational angle θ, we find that the nonlinear coefficient of this mode is dependent only on the size and material of nanoparticle, but independent of trapping potential shape. The bistability and hysteresis are displayed when the driving frequency is red detuned to the librational mode. In the blue-detuned region, we have studied squeezing of the variance of librational mode in detail, which has potential application for measurement of angle and angular momentum.

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  • Received 9 May 2017

DOI:https://doi.org/10.1103/PhysRevA.96.013837

©2017 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Ke-Wen Xiao1, Nan Zhao1, and Zhang-qi Yin2,*

  • 1Beijing Computational Science Research Center, Beijing 100193, China
  • 2Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University, Beijing 100084, China

  • *yinzhangqi@mail.tsinghua.edu.cn

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Vol. 96, Iss. 1 — July 2017

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