Results 191 to 200 of about 12,791 (220)
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Physical Review D
Superradiance, the phenomenon enabling energy extraction through radiation amplification, is not universal to all black holes. We show that semiclassical backreaction can induce superradiance, even when absent at the classical level.
Casey Cartwright +3 more
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Superradiance, the phenomenon enabling energy extraction through radiation amplification, is not universal to all black holes. We show that semiclassical backreaction can induce superradiance, even when absent at the classical level.
Casey Cartwright +3 more
semanticscholar +1 more source
Self-interaction effects on the Kerr black hole superradiance and their observational implications
Through the black hole (BH) superradiance, ultralight bosons can form dense clouds around rotating Kerr BHs. Certain ultralight bosons, such as axions and axion-like particles (promising dark matter candidates), naturally possess self-interactions, and ...
Ning Xie, Fa Peng Huang
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A photonic quantum engine driven by superradiance
Nature Photonics, 2022Performance of nano- and microscale heat engines can be improved with the help of quantum-mechanical phenomena. Recently, heat reservoirs with quantum coherence have been proposed to enhance engine performance beyond the Carnot limit even with a single ...
Jinuk Kim +5 more
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Astrophysical Journal
The superradiance instability of rotating black holes (BHs) leads to the formation of an ultralight boson cloud with distinctive observational signatures, making BHs an effective probe of ultralight bosons.
Hui-Yu Zhu +3 more
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The superradiance instability of rotating black holes (BHs) leads to the formation of an ultralight boson cloud with distinctive observational signatures, making BHs an effective probe of ultralight bosons.
Hui-Yu Zhu +3 more
semanticscholar +1 more source
Influence of initial states on memory effects: A study of early-time superradiance
Physical Review A, 2023The initial state of a quantum system can significantly influence its future dynamics, especially in non-Markovain quantum processes due to the environmental memory effects.
S. Hou +4 more
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physica status solidi (b), 1975
AbstractThe statistical aspects of exciton systems are considered. Calculations show that the non‐Bose character of the statistics plays a fundamental role in forming the exciton echo signal, self‐induced transparency, and other superradiant effects. As application of the general theory new phenomena as exciton nutation and forced exciton induction are
U. Kh. Kopvillem +2 more
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AbstractThe statistical aspects of exciton systems are considered. Calculations show that the non‐Bose character of the statistics plays a fundamental role in forming the exciton echo signal, self‐induced transparency, and other superradiant effects. As application of the general theory new phenomena as exciton nutation and forced exciton induction are
U. Kh. Kopvillem +2 more
openaire +1 more source
Interaction-Enhanced Superradiance of a Rydberg-Atom Array.
Physical Review LettersWe study the superradiant phase transition of an array of Rydberg atoms in a dissipative microwave cavity. Under the interplay of the cavity field and the long-range Rydberg interaction, the steady state of the system exhibits an interaction-enhanced ...
Yiwen Han, Haowei Li, Wei Yi
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Journal of Experimental and Theoretical Physics, 1999
If N atoms simultaneously interact with quasiresonant classical and quasiresonant quantized fields, the modes exchange photons. This processes exhibits cooperative properties, i.e., the number of photons in the quantized mode oscillates, and the amplitude of these oscillations is proportional to N2.
R. A. Ismailov, A. Ya. Kazakov
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If N atoms simultaneously interact with quasiresonant classical and quasiresonant quantized fields, the modes exchange photons. This processes exhibits cooperative properties, i.e., the number of photons in the quantized mode oscillates, and the amplitude of these oscillations is proportional to N2.
R. A. Ismailov, A. Ya. Kazakov
openaire +1 more source
Effects of Superradiance in Active Galactic Nuclei
Monthly notices of the Royal Astronomical SocietyA supermassive black hole (SMBH) at the core of an active galactic nucleus (AGN) provides room for the elusive ultra-light scalar particles (ULSP) to be produced through a phenomenon called superradiance.
Priyanka Sarmah +3 more
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Effects of Retardation on Many-Body Superradiance in Chiral Waveguide QED.
Physical Review LettersWe study the superradiant decay of a chain of atoms coupled to a chiral waveguide, focusing on the regime of non-negligible photon propagation time. Using an exact master equation description that accounts for delay effects, we obtain evidence to suggest
Bennet Windt +3 more
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