Stabilization of nonclassical states of one- and two-mode radiation fields by reservoir engineering

TL;DR

This paper extends reservoir engineering techniques to stabilize non-classical and entangled states in high-Q cavities, demonstrating robustness against imperfections and potential for near-future experimental realization.

Contribution

It generalizes existing reservoir engineering methods to protect mesoscopic entangled states across two modes, with detailed analysis of decoherence competition and experimental robustness.

Findings

Method effectively stabilizes non-classical states in cavities.

Operation remains robust under experimental imperfections.

Feasible implementation in microwave Cavity QED or circuit-QED.

Abstract

We analyze a quantum reservoir engineering method, originally introduced by [Sarlette et al. in Phys. Rev. Lett. 107, 010402 (2011) -- arXiv 1011.5057], for the stabilization of non-classical field states in high quality cavities. We generalize the method to the protection of mesoscopic entangled field states shared by two non-degenerate field modes. The reservoir is made up of a stream of atoms undergoing successive composite interactions with the cavity, each combining resonant with non-resonant parts. We get a detailed insight into the competition between the engineered reservoir and decoherence. We show that the operation is quite insensitive to experimental imperfections and that it could thus be implemented in the near future, either in the context of microwave Cavity Quantum Electrodynamics or in that of circuit-QED.