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Quantum Enhanced Cavity QED Interferometer with Partially Delocalized Atoms in Lattices



Anjun Chun, Peiru He, James K. Thompson, Ana Maria Rey


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 combined with the subsequent application of a compound pulse sequence that allows 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 10^4^ compared to unentangled lattice-based interferometers after accounting for primary sources of decoherence.
Physical Review Letters


cavity QED, interferometer, Wannier-Stark state


Chun, A. , He, P. , Thompson, J. and Rey, A. (2021), Quantum Enhanced Cavity QED Interferometer with Partially Delocalized Atoms in Lattices, Physical Review Letters, [online],, (Accessed May 28, 2024)


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Created November 17, 2021, Updated November 29, 2022