INTENTAS - Second Quantization and Entanglement in Atom interferometry

Atom interferometry as a means for sensing has shown to be very successful in a wide range of applications. Recent efforts are focussing on reaching beyond the standard quantum limit where quantum correlations become relevant. For that purpose, we consider the fully second quantized dynamics of a Bose-Einstein condensate (BEC) interacting with the electromagnetic quantum field in gravity. We study the effects that noise and BEC self-interactions have on the evolution of entanglement as a resource for atom interferometry. In particular, we determine the importance of quantum fluctuations for the interferometer sequence.