Atom-number fluctuation and macroscopic quantum entanglement in dipole spinor condensates

Yixiao Huang, Zhe Sun, and Xiaoguang Wang
Phys. Rev. A 89, 043601 – Published 3 April 2014

Abstract

We study the spin distribution and macroscopic entanglement in spinor condensates confined in an anisotropic potential under external magnetic fields. Different types of magnetic phases can be reached by tuning the magnetic dipolar interaction strength by modifying the trapping geometry. We investigate the atom-number fluctuations of the ground state and show that the different internal hyperfine states exhibit super-Poissonian, Poissonian, and sub-Poissonian distributions with different trapping geometries and strengths of the external magnetic field. We also propose a scheme to create a macroscopic maximally entangled spin state by slowly sweeping the external magnetic field.

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  • Received 12 January 2014

DOI:https://doi.org/10.1103/PhysRevA.89.043601

©2014 American Physical Society

Authors & Affiliations

Yixiao Huang1,2,*, Zhe Sun3, and Xiaoguang Wang2,†

  • 1Department of Physics and Center of Theoretical and Computational Physics, The University of Hong Kong, Hong Kong, China
  • 2Zhejiang Institute of Modern Physics, Department of Physics, Zhejiang University, Hangzhou 310027, China
  • 3Department of Physics, Hangzhou Normal University, Hangzhou 310036, China

  • *yxhuang1226@gmail.com
  • xgwang@zimp.zju.edu.cn

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Vol. 89, Iss. 4 — April 2014

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