Critically-enhanced spin-nematic squeezing and entanglement in dipolar
spinor condensates
- URL: http://arxiv.org/abs/2009.09728v1
- Date: Mon, 21 Sep 2020 10:03:57 GMT
- Title: Critically-enhanced spin-nematic squeezing and entanglement in dipolar
spinor condensates
- Authors: Qing-Shou Tan, Yixiao Huang, Qiong-Tao Xie, and Xiaoguang Wang
- Abstract summary: We show that the quantum phase transitions can improve the squeezing and QFI in the nearby regime of critical point.
It is shown that the steady squeezing and entanglement can be obtained, and the Bogoliubov approximation can well describe the dynamics of spin-nematic squeezed vacuum state.
- Score: 1.4074478796489716
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We study the quantum critical effect enhanced spin-nematic squeezing and
quantum Fisher information (QFI) in the spin-1 dipolar atomic Bose-Einstein
condensate. We show that the quantum phase transitions can improve the
squeezing and QFI in the nearby regime of critical point, and the
Heisenberg-limited high-precision metrology can be obtained. The different
properties of the ground squeezing and entanglement under even and odd number
of atoms are further analyzed, by calculating the exact analytical
expressions.We also demonstrate the squeezing and entanglement generated by the
spin-mixing dynamics around the phase transition point. It is shown that the
steady squeezing and entanglement can be obtained, and the Bogoliubov
approximation can well describe the dynamics of spin-nematic squeezed vacuum
state.
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