Strongly Correlated Photon Transport in Waveguide Quantum Electrodynamics with Weakly Coupled Emitters

Sahand Mahmoodian, Mantas Čepulkovskis, Sumanta Das, Peter Lodahl, Klemens Hammerer, and Anders S. Sørensen
Phys. Rev. Lett. 121, 143601 – Published 3 October 2018
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Abstract

We show that strongly correlated photon transport can be observed in waveguides containing optically dense ensembles of emitters. Remarkably, this occurs even for weak coupling efficiencies. Specifically, we compute the photon transport properties through a chirally coupled system of N two-level systems driven by a weak coherent field, where each emitter can also scatter photons out of the waveguide. The photon correlations arise due to an interplay of nonlinearity and coupling to a loss reservoir, which creates a strong effective interaction between transmitted photons. The highly correlated photon states are less susceptible to losses than uncorrelated photons and have a power-law decay with N. This is described using a simple universal asymptotic solution governed by a single scaling parameter which describes photon bunching and power transmission. We show numerically that, for randomly placed emitters, these results hold even in systems without chirality. The effect can be observed in existing tapered fiber setups with trapped atoms.

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  • Received 9 March 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.143601

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Sahand Mahmoodian1,2,*, Mantas Čepulkovskis3, Sumanta Das3, Peter Lodahl3, Klemens Hammerer1, and Anders S. Sørensen3

  • 1Institute for Theoretical Physics, Institute for Gravitational Physics (Albert Einstein Institute), Leibniz University Hannover, Appelstraße 2, 30167 Hannover, Germany
  • 2Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen, Denmark
  • 3Center for Hybrid Quantum Networks (Hy-Q), Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen, Denmark

  • *sahand.mahmoodian@itp.uni-hannover.de

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Vol. 121, Iss. 14 — 5 October 2018

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