Colloquium: Strongly interacting photons in one-dimensional continuum

Roy, Dibyendu; Wilson, C. M.; Firstenberg, Ofer

doi:10.1103/RevModPhys.89.021001

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Colloquium: Strongly interacting photons in one-dimensional continuum

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Roy, Dibyendu
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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https://journals.aps.org/rmp/abstract/10.1103/RevModPhys.89.021001
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Roy, D., Wilson, C. M., & Firstenberg, O. (2017). Colloquium: Strongly interacting photons in one-dimensional continuum. Reviews of Modern Physics, 89(2): 021001. doi:10.1103/RevModPhys.89.021001.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-C349-6

Abstract

Photon-photon scattering in vacuum is extremely weak. However, strong effective interactions between single photons can be realized by employing strong light-matter coupling. These interactions are a fundamental building block for quantum optics, bringing many-body physics to the photonic world and providing important resources for quantum photonic devices and for optical metrology. This Colloquium reviews the physics of strongly interacting photons in one-dimensional systems with no optical confinement along the propagation direction. It focuses on two recently demonstrated experimental realizations: superconducting qubits coupled to open transmission lines and interacting Rydberg atoms in a cold gas. Advancements in the theoretical understanding of these systems are presented in complementary formalisms and compared to experimental results. The experimental achievements are summarized alongside a description of the quantum optical effects and quantum devices emerging from them.