Results 111 to 120 of about 3,793 (206)

Superradiance

Superradiance is a radiation enhancement process that involves dissipative systems. With a 60 year-old history, superradiance has played a prominent role in optics, quantum mechanics and especially in relativity and astrophysics.
PANI, PAOLO, Vitor Cardoso, Richard Brito   +2 more
core  

Superradiant Scattering by Wormholes in Bopp–Podolsky Electrodynamics

Universe
Superradiance is a scattering process in which incident waves are amplified by a scatterer, such as a black hole, leading to the extraction of energy from the system. In this work, we study superradiant scattering within Bopp–Podolsky electrodynamics, an
Diego Augusto Frizo, Cássius Anderson Miquele de Melo, Maurício Richartz   +2 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

Superradiant Superconductivity

, 2012
We suggest possibility of Dicke superradiance in superconductors. The necessary 2-level atoms are identified with Anderson pseudo spins in k-space, seeing a k-dependent self consistent mean field. A way to couple these 2-level bose atoms to a macroscopically excited coherent boson mode and create a novel nonequilibrium superradiant superconductivity ...
openaire   +2 more sources

On-chip coupling and synchronization of quantum emitters using superradiant coupling channels

Academia Quantum
Superradiance offers an efficient approach for coupling discrete quantum emitters via collective fluorescence. In this work, we suggest a method for the controlled coupling and synchronization of distant integrated photonic emitters using ...
Roman Shugayev
doaj   +1 more source

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

Analytical and numerical studies of periodic superradiance

We conduct a theoretical study to understand the periodic superradiance observed in an Er:YSO crystal. First, we construct a model based on the Maxwell-Bloch equations for a reduced level system, a pair of superradiance states and a population reservoir ...
Yoshimura, Motohiko, Yoshimi, Akihiro, Han, Junseok, Imai, Yasutaka, Hara, Hideaki, Yoshimura, Koji, Miyamoto, Yuki, Omoto, Riku, Sasao, Noboru   +8 more
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  

Semiclassical spin damping: Superradiance revisited

, 1998
12 pages standard revtex; to be published in EPJ DA well known description of superradiance from pointlike collections of many atoms involves the dissipative motion of a large spin.
Weber, Joachim, Braun, Petr A., Haake, Fritz, Braun, Daniel   +3 more
core   +1 more source

Superradiance of intense electron bunches

, 2006
One of the attractive methods of generating an ultrashort electromagnetic pulse is based on stimulated emission from intense extended electron bunches.
Yalandin, M, Rostov, V, Phelps, Alan, Korovin, S, Ginzburg, N   +4 more
core   +1 more source