Abstract

There has recently been a great deal of interest in the study of massive mechanical oscillators in the quantum regime. This is motivated by the possibility of universal interfaces in future quantum networks, sensing with unprecedented resolution, and fundamental interest in the limits of quantum mechanics. I will describe the recently reported first demonstrations of the measurement of mechanical motion in a negative-mass reference frame, and stabilisation of the entanglement between massive mechanical oscillators [C. F. Ockeloen-Korppi et al., Nature 556, 478-482 (2018)]. I will describe proposals for extending these demonstrations to multipartite entanglement, and a recent analysis of the force sensing possibilities that emerge from combining these technologies. The latter shall be discussed in the context of recently formulated general limits to quantum sensing.

© 2019 The Author(s)