Quantum Enhanced Cavity QED Interferometer with Partially Delocalized Atoms in Lattices

Chu, Anjun; He, Peiru; Thompson, James K.; Rey, Ana Maria

doi:10.1103/physrevlett.127.210401

Title: Quantum Enhanced Cavity QED Interferometer with Partially Delocalized Atoms in Lattices

Journal Article · 17 November 2021 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.127.210401 · OSTI ID:1963794

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^[1]; Thompson, James K. ^[1];

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Univ. of Colorado, Boulder, CO (United States); National Inst. of Standards and Technology (NIST), Boulder, CO (United States)

Herein, 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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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Quantum Information Science (QIS) Research Centers (United States). Quantum Systems Accelerator (QSA)

Sponsoring Organization:: USDOE Office of Science (SC); US Air Force Office of Scientific Research (AFOSR); Defense Advanced Research Projects Agency (DARPA); US Army Research Office (ARO); National Science Foundation (NSF); National Institute of Standards and Technology (NIST)

Grant/Contract Number:: AC02-05CH11231; FA9550-18-1-0319; W911NF-16-1-0576; W911NF-19-1-0210; PHY1820885; JILA-PFC PHY-1734006; QLCI-2016244

OSTI ID:: 1963794

Journal Information:: Physical Review Letters, Vol. 127, Issue 21; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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