Vacuum spin squeezing
Name
PhysRevA.96.050301.pdf
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343.68 KB
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Checksum (MD5)
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Author(s)
Hu, Jiazhong
Chen, Wenlan
Vendeiro, Zachary Michael
Urvoy, Alban Joseph
Braverman, Boris
Vuletic, Vladan
Date Issued
November 2017
Journal
Physical Review A
Publisher
American Physical Society
Citation
Hu, Jiazhong, et al. “Vacuum Spin Squeezing.” Physical Review A, vol. 96, no. 5, Nov. 2017. © 2017 American Physical Society
Version
Final published version
Abstract
We investigate the generation of entanglement (spin squeezing) in an optical-transition atomic clock through the coupling to an optical cavity in its vacuum state. We show that if each atom is prepared in a superposition of the ground state and a long-lived electronic excited state, and viewed as a spin-1/2 system, then the collective vacuum light shift entangles the atoms, resulting in a squeezed distribution of the ensemble collective spin, without any light applied. This scheme reveals that even an electromagnetic vacuum can constitute a useful resource for entanglement and quantum manipulation. By rotating the spin direction while coupling to the vacuum, the scheme can be extended to implement two-axis twisting resulting in stronger squeezing.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevA.96.050301
