Near-unitary spin squeezing with ytterbium (Conference Presentation)

Boris Braverman; Akio Kawasaki; Edwin Pedrozo-Peñafiel; Simone Colombo; Chi Shu; Zeyang Li; Enrique Mendez; Megan Yamoah; Leonardo Salvi; Daisuke Akamatsu; Yanhong Xiao; Vladan Vuletic

doi:10.1117/12.2552065

9 March 2020 Near-unitary spin squeezing with ytterbium (Conference Presentation)

Boris Braverman, Akio Kawasaki, Edwin Pedrozo-Peñafiel, Simone Colombo, Chi Shu, Zeyang Li, Enrique Mendez, Megan Yamoah, Leonardo Salvi, Daisuke Akamatsu, Yanhong Xiao, Vladan Vuletic

Author Affiliations +

Proceedings Volume 11296, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II; 112960E (2020) https://doi.org/10.1117/12.2552065
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

State of the art atomic sensors operate near the standard quantum limit (SQL) of projection noise, and overcoming this limit by using atom-atom entanglement such as spin squeezing is a major goal in quantum metrology. By coupling an ensemble of approximately 1000 Yb-171 atoms to a high-finesse asymmetric micromirror cavity with single-atom cooperativity of 1.8., we produce a near-unitary spin squeezed state. The observed spin noise suppression and metrological gain are limited by the state readout to 9.4(4) dB and 6.5(4) dB, respectively, while the generated states offer a spin noise suppression of 15.9(6) dB and a metrological gain of 12.9(6) dB over the standard quantum limit, limited by the curvature of the Bloch sphere. When requiring the squeezing process to be within 30% of unitarity, we demonstrate an interferometer that improves the averaging time over the SQL by a factor of 3.7(2).

Conference Presentation

Citation Download Citation

Boris Braverman, Akio Kawasaki, Edwin Pedrozo-Peñafiel, Simone Colombo, Chi Shu, Zeyang Li, Enrique Mendez, Megan Yamoah, Leonardo Salvi, Daisuke Akamatsu, Yanhong Xiao, and Vladan Vuletic "Near-unitary spin squeezing with ytterbium (Conference Presentation)", Proc. SPIE 11296, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II, 112960E (9 March 2020); https://doi.org/10.1117/12.2552065

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