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arXiv · 1611.07484

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

Martin Koppenhöfer·Juha Leppäkangas·Michael Marthaler
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Abstract

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

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Martin Koppenhöfer, Juha Leppäkangas, Michael Marthaler. 2017-04-25. Creating photon-number squeezed strong microwave fields by a Cooper-pair injection laser. https://doi.org/10.1103/physrevb.95.134515

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