Super-Radiant Dynamics, Doorways, and Resonances in Nuclei and Other Open Mesoscopic Systems

Abstract

The phenomenon of super-radiance (Dicke effect, coherent spontaneous radiation by a gas of atoms coupled through the common radiation field) is well known in quantum optics. The review discusses similar physics that emerges in open and marginally stable quantum many-body systems. In the presence of open decay channels, the intrinsic states are coupled through the continuum. At sufficiently strong continuum coupling, the spectrum of resonances undergoes the restructuring with segregation of very broad super-radiant states and trapping of remaining long-lived compound states. The appropriate formalism describing this phenomenon is based on the Feshbach projection method and effective non-Hermitian Hamiltonian. A broader generalization is related to the idea of doorway states connecting quantum states of different structure. The method is explained in detail and the examples of applications are given to nuclear, atomic and particle physics. The interrelation of the collective dynamics through continuum and possible intrinsic many-body chaos is studied, including universal mesoscopic conductance fluctuations. The theory serves as a natural framework for general description of a quantum signal transmission through an open mesoscopic system.

85 pages, 10 figures

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• Exceptional points near first- and second-order quantum phase transitions
• Gain and loss in open quantum systems
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• Superradiance Transition and Nonphotochemical Quenching in Photosynthetic Complexes
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• Weakly bound systems, continuum effects, and reactions
• Quantum signal transmission through a single-qubit chain
• Environment-Protected Solid State Based Distributed Charge Qubit
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• Critical phenomena in light-matter systems with collective matter interactions
• Possible Role of Interference and Sink Effects in Nonphotochemical Quenching in Photosynthetic Complexes
• Analysis of chaos and regularity in the open Dicke model
• Mollow triplet: pump probe single photon spectroscopy of artificial atoms
• A Vision for the Science of Rare Isotopes
• Superradiance in finite quantum systems randomly coupled to continuum
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• Influence of Impurity on the Rate of Single Photon Superradiance in Disordered N Qubit Chain
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• Impact of alternative transmission coefficient parameterizations on Hauser-Feshbach theory
• Excitation of the collective states in a three-qubit system
• Transmission Resonances Anomaly in 1D Disordered Quantum Systems
• Transmission coefficients in compound-nucleus reaction theory