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.
, He, P.
, Thompson, J.
and Rey, A.
Quantum Enhanced Cavity QED Interferometer with Partially Delocalized Atoms in Lattices, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.127.210401, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932201
(Accessed August 15, 2022)