Two-photon blockade and photon-induced tunneling generated by squeezing

TL;DR

This paper demonstrates that two-photon blockade and photon-induced tunneling can be achieved in a driven harmonic cavity coupled to a squeezed reservoir, without the need for an atom or intrinsic nonlinearity.

Contribution

It introduces a novel method to generate photon blockade effects using a squeezed reservoir instead of traditional nonlinear systems.

Findings

Two-photon blockade achieved without atomic nonlinearities.

Photon-induced tunneling observed in a linear cavity with squeezed reservoir.

Simulation results with squeezed coherent and displaced squeezed thermal states.

Abstract

Inspired by the recent experiment of Hamsen et al. [Phys. Rev. Lett. 118, 133604 (2017)], which demonstrated two-photon blockade in a driven nonlinear system (composed of a harmonic cavity with a driven atom), we show that two-photon blockade and other nonstandard types of photon blockade and photon-induced tunneling can be generated in a driven harmonic cavity without an atom or any other kind of nonlinearity, but instead coupled to a nonlinear (i.e., squeezed) reservoir. We also simulate these single- and two-photon effects with squeezed coherent states and displaced squeezed thermal states.