Results 111 to 120 of about 2,656 (211)

THz Superradiance from a GaAs: ErAs Quantum Dot Array at Room Temperature

Applied Sciences, 2019
We report that an ErAs quantum-dot array in a GaAs matrix under 1550 nm pulsed excitation produces cooperative spontaneous emission—Dicke superradiance—in the terahertz frequency region at room temperature.
Weidong Zhang, Elliott R. Brown, Andrea Mingardi, Richard P. Mirin, Navid Jahed, Daryoosh Saeedkia   +5 more
doaj   +1 more source

Acoustic superradiance from an optical-superradiance-induced vortex in a Bose-Einstein condensate

, 2014
We consider the scattering of an acoustic wave from a vortex induced by optical superradiance. The vortex is created by pumping a large amount of angular momentum with a Laguerre-Gaussian light beam in an atomic Bose-Einstein condensate.
Müstecaplıoğlu, Özgür, Mustecaplioglu, Ozgur Esat, Ghazanfari, Nader   +2 more
core   +1 more source

Hairless black hole by superradiance

Journal of High Energy Physics
We investigate the interplaying effects of black hole scalarization and superradiance in the context of the Einstein-Maxwell-scalar model, with the scalar field possessing electric charge.
Sebastian Garcia-Saenz, Guangzhou Guo, Peng Wang, Xinmiao Wang   +3 more
doaj   +1 more source

Cooperative Decay of N Atoms in a Ring Configuration

Atoms
We provide an analytic expression of the spectrum of the cooperative decay rate of N two-level atoms regularly distributed on a ring in the single-excitation configuration.
Nicola Piovella
doaj   +1 more source

Thermal Decoherence of Superradiance in Lead Halide Perovskite Nanocrystal Superlattices

, 2020
Recent experiments by Rainò et al. (Nature 2018, 563, 671-675) have documented cooperative emission from CsPbBr3 nanocrystal superlattices, exhibiting the hallmarks of low-temperature superradiance.
Borgonovi F., Mattiotti F.
core   +1 more source

Nuclear superradiance into anomalous emission channels

, 1978
Text includes handwritten formulasThis thesis investigates the coherent spontaneous emission, or superradiance, of initial nuclear excitations into anomalous emission (Borrmann modes) for a perfect needle-shaped crystal sample.
Hung, Nguyen V.
core  

Multipole cluster superradiance in gamma optics [PDF]

, 2005
The special features of superradiance in systems comprising a few closely grouped particles (clusters) are studied analytically in the case in which the exchange interaction starts to play a significant role.
Kalachev A., Samartsev V., Kharintsev S.
core  

Q-ball Superradiance

Q-balls are non-topological solitons that coherently rotate in field space. We show that these coherent rotations can induce superradiance for scattering waves, thanks to the fact that the scattering involves two coupled modes.
Zhou, Shuang-Yong, Saffin, Paul M., Xie, Qi-Xin   +2 more
core  

Long-lived triggering optical superradiance in doped Van Vleck paramagnetics [PDF]

, 1999
The theory of long-lived optical triggering optical superradiance is developed by the method of non-equilibrium statistical Zubarev-Peletminsky operator.
Andrianov S., Samartsev V.
core  

Theory and design consideration of a THz superradiant waveguide FEL

Frontiers in Physics
We present theoretical analysis and design considerations of a THz superradiant FEL. We derive analytical expressions for the spectral parameter of THz radiation, emitted superradiantly in a rectangular waveguide using a Longitudinal Section Magnetic ...
Amir Weinberg, Avraham Gover, Ariel Nause, Aharon Friedman, Reuven Ianconescu, Andrew Fisher, Pietro Musumeci, Atsushi Fukasawa, James Rosenzweig   +8 more
doaj   +1 more source