Journal of East China Normal University(Natural Science) ›› 2023, Vol. 2023 ›› Issue (4): 74-85.doi: 10.3969/j.issn.1000-5641.2023.04.008

• Physics and Electronics • Previous Articles     Next Articles

Quantum entanglement of molecular dipole arrays trapped in an optical lattice

Wenjing YUE, Qi WEI*()   

  1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200241, China
  • Received:2022-03-07 Online:2023-07-25 Published:2023-07-25
  • Contact: Qi WEI


For a polar molecule subjected to an external electric field, its molecular axis will oscillate around the direction of the electric field, forming pendular states. Taking the two lowest-lying pendular states with magnetic quantum number $M=0 $ as qubit states, we study quantum entanglement of polar molecular arrays trapped in a one-dimensional optical lattice. We evaluate pairwise concurrence and global entanglement as functions of three dimensionless variables related to external field intensity–permanent dipole moment, a rotation constant, dipole-dipole interaction, and temperature —thus revealing the properties of the entangled molecular dipole arrays.

Key words: quantum entanglement, polar molecule, pendular state, optical lattice

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