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Proceedings Paper

Advantages of interaction-based readout for quantum sensing
Author(s): Emily Davis; Gregory Bentsen; Tracy Li; Monika Schleier-Smith
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Paper Abstract

Detection noise poses a challenge for achieving Heisenberg-limited phase estimation. We discuss a "twisting echo" protocol1 that addresses this problem by using interactions to amplify a spectroscopic signal. The echo protocol enables phase sensitivity near the Heisenberg limit while permitting detection noise on the order of the quantum noise of an unentangled state. For comparison with conventional schemes requiring direct detection of entangled states, we calculate the dependence of metrological gain on detection noise in Ramsey spectroscopy with squeezed, twin Fock, and GHZ states. The twisting echo outperforms all of these alternatives if the detection uncertainty is at or above the single-atom level.

Paper Details

Date Published: 20 February 2017
PDF: 10 pages
Proc. SPIE 10118, Advances in Photonics of Quantum Computing, Memory, and Communication X, 101180Z (20 February 2017); doi: 10.1117/12.2257033
Show Author Affiliations
Emily Davis, Stanford Univ. (United States)
Gregory Bentsen, Stanford Univ. (United States)
Tracy Li, Stanford Univ. (United States)
Monika Schleier-Smith, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 10118:
Advances in Photonics of Quantum Computing, Memory, and Communication X
Zameer Ul Hasan; Philip R. Hemmer; Hwang Lee; Alan L. Migdall, Editor(s)

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