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Impact of non-unitary spin squeezing on atomic clock performance
Name
Braverman_2018_New_J._Phys._20_103019.pdf
Description
Published version
Size
1.6 MB
Format
Adobe PDF
Checksum (MD5)
e9418bf61fe68e2bdb3c4adb1f944c42
Author(s)
Braverman, Boris
Kawasaki, Akio
Vuletić, Vladan
Date Issued
2018
Journal
New Journal of Physics
Publisher
IOP Publishing
Version
Final published version
Abstract
© 2018 The Author(s). Published by IOP Publishing Ltd on behalf of Deutsche Physikalische Gesellschaft. Spin squeezing is a form of entanglement that can improve the stability of quantum sensors operating with multiple particles, by inducing inter-particle correlations that redistribute the quantum projection noise. Previous analyses of potential metrological gain when using spin squeezing were performed on theoretically ideal states, without incorporating experimental imperfections or inherent limitations which result in non-unitary quantum state evolution. Here, we show that potential gains in clock stability are substantially reduced when the spin squeezing is non-unitary, and derive analytic formulas for the clock performance as a function of squeezing, excess spin noise, and interferometer contrast. Our results highlight the importance of creating and employing nearly pure entangled states for improving atomic clocks.
Terms of Use
Creative Commons Attribution 3.0 unported license
Persistent DSpace Link
DOI of Published Version
10.1088/1367-2630/AAE563
