Quantum Enhanced Cavity QED Interferometer with Partially Delocalized Atoms in Lattices

Anjun Chu, Peiru He, James K. Thompson, and Ana Maria Rey
Phys. Rev. Lett. 127, 210401 – Published 17 November 2021
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Abstract

We propose a quantum enhanced interferometric protocol for gravimetry and force sensing using cold atoms in an optical lattice supported by a standing-wave cavity. By loading the atoms in partially delocalized Wannier-Stark states, it is possible to cancel the undesirable inhomogeneities arising from the mismatch between the lattice and cavity fields and to generate spin squeezed states via a uniform one-axis twisting model. The quantum enhanced sensitivity of the states is combined with the subsequent application of a compound pulse sequence that allows us to separate atoms by several lattice sites. This, together with the capability to load small atomic clouds in the lattice at micrometric distances from a surface, make our setup ideal for sensing short-range forces. We show that for arrays of 104 atoms, our protocol can reduce the required averaging time by a factor of 10 compared to unentangled lattice-based interferometers after accounting for primary sources of decoherence.

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  • Received 15 April 2021
  • Accepted 12 October 2021

DOI:https://doi.org/10.1103/PhysRevLett.127.210401

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalQuantum Information, Science & Technology

Authors & Affiliations

Anjun Chu1,2,*, Peiru He1,2, James K. Thompson1, and Ana Maria Rey1,2

  • 1JILA, NIST and Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
  • 2Center for Theory of Quantum Matter, University of Colorado, Boulder, Colorado 80309, USA

  • *anjun.chu@colorado.edu

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Issue

Vol. 127, Iss. 21 — 19 November 2021

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