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We theoretically investigate the generation of atom-light entanglement viaRaman superradiance in an optical cavity, and show how this can be used toenhance the sensitivity of atom interferometry. We model a realistic opticalcavity, and show that by careful temporal shaping of the optical localoscillator used to measure the light emitted from the cavity, information inthe optical mode can be combined with the signal from the atom interferometerto reduce the quantum noise, and thus increase the sensitivity. It was found inPhys. Rev. Lett. 110, 053002 (2013) that an atomic `seed' was required in orderto reduce spontaneous emission and allow for single mode behaviour of thedevice. In this paper we find that the optical cavity reduces the need for anatomic seed, which allows for stronger atom-light correlations and a greaterlevel of quantum enhancement.

Generation of Atom-Light Entanglement in an Optical Cavity for Quantum Enhanced Atom-Interferometery