Engineering Gaussian states of light from a planar microcavity

Year: 2018

Authors: Van Regemortel M., Ravets S., Imamoglu A., Carusotto I., Wouters M.

Autors Affiliation: Univ Antwerp, TQC, Univ Pl 1, B-2610 Antwerp, Belgium; Swiss Fed Inst Technol, Inst Quantum Elect, CH-8093 Zurich, Switzerland; Univ Trento, INO CNR BEC Ctr, Via Sommar 14, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, Via Sommar 14, I-38123 Povo, Italy.

Abstract: Quantum fluids of light in a nonlinear planar microcavity can exhibit antibunched photon statistics at short distances due to repulsive polariton interactions. We show that, despite the weakness of the nonlinearity, the antibunching signal can be amplified orders of magnitude with an appropriate free-space optics scheme to select and interfere output modes. Our results are understood from the unconventional photon blockade perspective by analyzing the approximate Gaussian output state of the microcavity. In a second part, we illustrate how the temporal and spatial profile of the density-density correlation function of a fluid of light can be reconstructed with free-space optics. Also here the nontrivial (anti)bunching signal can be amplified significantly by shaping the light emitted by the microcavity.

Journal/Review: SCIPOST PHYSICS

Volume: 5 (1)      Pages from: 13-1  to: 13-24

More Information: MVR gratefully acknowledges support in the form of a Ph. D. fellowship of the Research Foundation – Flanders (FWO) and hospitality at the BEC Center in Trento. MW acknowledge financial support from the FWO-Odysseus program. IC was funded by the EU-FET Proactive grant AQuS, Project No. 640800, and by Provincia Autonoma di Trento, partially through the project On silicon chip quantum optics for quantum computing and secure communications (SiQuro). Al was funded by an ERC Advanced investigator grant (POLTDES). SR acknowledges support from the ETH Zurich Postdoctoral Fellowship Program.
KeyWords: interacting photons; quantum simulation; blockade; generation; cavity
DOI: 10.21468/SciPostPhys.5.1.013

Citations: 2
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