title: Optomechanical interface for probing matter-wave coherence.
abstract: We combine matter-wave interferometry and cavity optomechanics to propose a coherent matter-light interface based on mechanical motion at the quantum level. We demonstrate a mechanism that is able to transfer non-classical features imprinted on the state of a matter-wave system to an optomechanical device, transducing them into distinctive interference fringes. This provides a reliable tool for the inference of quantum coherence in the particle beam. Moreover, we discuss how our system allows for intriguing perspectives, paving the way to the construction of a device for the encoding of quantum information in matter-wave systems. Our proposal, which highlights previously unforeseen possibilities for the synergistic exploitation of these two experimental platforms, is explicitly based on existing technology, available and widely used in current cutting-edge experiments.
authors.affiliation: 1] Centre for Theoretical Atomic, Molecular and Optical Physics, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, United Kingdom [2] Department of Physics, University of Malta, Msida MSD 2080, Malta.
authors.forename: André
authors.initials: A
authors.lastname: Xuereb
authors.forename: Hendrik
authors.initials: H
authors.lastname: Ulbricht
authors.forename: Mauro
authors.initials: M
authors.lastname: Paternostro