Creating photon-number squeezed strong microwave fields by a Cooper-pair injection laser

摘要

The use of artificial atoms as an active lasing medium opens a way to construct novel sources of nonclassicalradiation. An example is the creation of photon-number squeezed light. Here, we present a design of alaser consisting of multiple Cooper-pair transistors coupled to a microwave resonator. Over a broad rangeof experimentally realizable parameters, this laser creates photon-number squeezed microwave radiation,characterized by a Fano factor F 1, at a very high resonator photon number. We investigate the impact ofgate-charge disorder in a Cooper-pair transistor and show that the system can create squeezed strong microwavefields even in the presence of maximum disorder.