Many-body superradiance and dynamical mirror symmetry breaking in waveguide QED

Abstract

The many-body decay of extended collections of two-level systems remains an open problem. Here, we investigate whether an array of emitters coupled to a one-dimensional bath undergoes Dicke superradiance. This is a process whereby a completely inverted system becomes correlated via dissipation, leading to the release of all the energy in the form of a rapid photon burst. We derive the minimal conditions for the burst to happen as a function of the number of emitters, the chirality of the waveguide, and the single-emitter optical depth, both for ordered and disordered ensembles. Many-body superradiance occurs because the initial fluctuation that triggers the emission is amplified throughout the decay process. In one-dimensional baths, this avalanchelike behavior leads to a spontaneous mirror symmetry breaking, with large shot-to-shot fluctuations in the number of photons emitted to the left and right. Superradiant bursts may thus be a smoking gun for the generation of correlated photon states of exotic quantum statistics.

arXiv comment16 pages, 9 figures

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• Effects of retardation on many-body superradiance in chiral waveguide QED
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• Waveguide Excitation and Spin Pumping of Chirally Coupled Quantum Dots
• Directional emission and photon bunching from a qubit pair in waveguide
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• Exploring global symmetry-breaking superradiant phase via phase competition
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• Emergence of second-order coherence in superfluorescence
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• Selective band interaction and long-range hopping in a structured environment with giant atoms
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• Controlling Excitation Localization in Waveguide QED Systems
• Phase-Space Methods for Many-Body Quantum Optics
• Exact Many-body Quantum Dynamics in One-Dimensional Baths via Collective Spins
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• Exotic collective behaviors of giant quantum emitters in two-dimensional baths
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• Initiation of Superradiance from Different Collective-Spin States