Properties of ultralight bosons from heavy quasar spins via superradiance
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/05/007
Abstract: The mass and the spin of accreting and jetted black holes, at the center of Active Galactic Nuclei (AGNs), can be probed by analyzing their electromagnetic spectra. For this purpose, we use the Spin-Modified Fundamental… read more here.
Keywords: properties ultralight; mass; axion; superradiance ... See more keywords
Superradiance of massive scalar particles around rotating regular black holes
Sign Up to like & getrecommendations! Published in 2022 at "Chinese Physics C"
DOI: 10.1088/1674-1137/accdc7
Abstract: Regular black holes, as an important attempt to eliminate the singularities in general relativity, have been widely concerned. Due to the fact that the superradiance associated with rotating regular black holes plays an indispensable role… read more here.
Keywords: regular black; energy extraction; instability; superradiance ... See more keywords
Generalization of the Menegozzi and Lamb maser algorithm to the transient superradiance regime
Sign Up to like & getrecommendations! Published in 2021 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stab2222
Abstract: We investigate the application of the conventional quasi-steady state maser modelling algorithm of Menegozzi & Lamb (ML) to the high field transient regime of the one-dimensional Maxwell-Bloch (MB) equations for a velocity distribution of atoms or… read more here.
Keywords: velocity; menegozzi lamb; superradiance; transient ... See more keywords
New evidence for Dicke’s superradiance in the 6.7 GHz methanol spectral line in the interstellar medium
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz074
Abstract: We present new evidence for superradiance in the methanol 6.7 GHz spectral line for three different star-forming regions: S255IR-NIRS3, G24.329+0.144, and Cepheus A. Our analysis shows that some of the intensity flares exhibiting fast flux… read more here.
Keywords: new evidence; superradiance; radiation; spectral line ... See more keywords
Quantum coherence and speed limit in the mean-field Dicke model of superradiance
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review A"
DOI: 10.1103/physreva.102.053716
Abstract: Dicke superrandiance is a cooperative phenomenon which arises from the collective coupling of an ensemble of atoms to the electromagnetic radiation. Here we discuss the quantifying of quantum coherence for the Dicke model of superradiance… read more here.
Keywords: dicke; superradiance; quantum coherence; coherence ... See more keywords
Superradiance in inverted multilevel atomic clouds
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review A"
DOI: 10.1103/physreva.95.033839
Abstract: This work examines superradiance in initially inverted clouds of multilevel atoms. We develop a set of equations that can approximately calculate the temporal evolution of $N$ coupled atoms. This allows us to simulate clouds containing… read more here.
Keywords: superradiance inverted; atomic clouds; superradiance; inverted multilevel ... See more keywords
Black hole superradiance in dynamical Chern-Simons gravity
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review D"
DOI: 10.1103/physrevd.107.084016
Abstract: Black hole superradiance provides a window into the dynamics of light scalar fields and their interactions close to a rotating black hole. Due to the rotation of the black hole, the amplitude of the scalar… read more here.
Keywords: dynamical chern; hole; black hole; superradiance ... See more keywords
Experimental Fock-State Superradiance.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.120.083603
Abstract: Superradiance in an ensemble of atoms leads to the collective enhancement of radiation in a particular mode shared by the atoms in their spontaneous decay from an excited state. The quantum aspects of this phenomenon… read more here.
Keywords: state; quantum; experimental fock; state superradiance ... See more keywords
Coherent single-atom superradiance
Sign Up to like & getrecommendations! Published in 2018 at "Science"
DOI: 10.1126/science.aar2179
Abstract: Building up to superradiance, one by one Superradiance is a quantum phenomenon that occurs when emitters are sufficiently close to change spontaneous emission. Controlling the position and state of emitters within an atomic ensemble, however,… read more here.
Keywords: coherent single; cavity; superradiance; single atom ... See more keywords
Coherent modulation of superradiance from nitrogen ions pumped with femtosecond pulses.
Sign Up to like & getrecommendations! Published in 2019 at "Optics express"
DOI: 10.1364/oe.27.012638
Abstract: Singly ionized nitrogen molecules in ambient air pumped by 800 nm femtosecond laser give rise to superradiant emission. Here, we study this superradiance by injecting a pair of resonant seeding pulses at different intensity ratios… read more here.
Keywords: coherent modulation; femtosecond; superradiance; modulation ... See more keywords
Mechanochemical Activation of Superradiance in Paramagnetic Polymer Composites.
Sign Up to like & getrecommendations! Published in 2023 at "Materials"
DOI: 10.3390/ma16031297
Abstract: The review examines the effect of radio-frequency superradiance during pulsed mechanochemical activation of polymer composites under high pressure. Mechanochemical activation is implemented in three modes: (a) rheological explosion of polymer composite under rapid uniaxial compression,… read more here.
Keywords: paramagnetic polymer; mechanochemical activation; polymer composites; superradiance ... See more keywords