Results 261 to 270 of about 45,670 (293)

Theory of cooperative spontaneous emission

Soviet Journal of Quantum Electronics, 1978
An analysis is made of the deexcitation kinetics of strongly excited extended systems of initially uncorrelated two-level radiators. The possibility of partially cooperative states of the system is predicted when the radiation intensity acquires values intermediate between the spontaneous decay intensity and the Dicke superradiance intensity.
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Quantum Fluctuations in Cooperative Emission of Radiation

Physical Review A, 1973
We investigate the statistical properties of the intensity of radiation emitted by $N$ two-level systems, for which the cooperation number is constant. The $l$-fold moments of the intensity are shown to obey a closed set of equations. For long times, the normalized moments are found to go up to infinity.
G. Oliver, A. Tallet
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Spontaneous cooperative emission in a cavity

SPIE Proceedings, 1999
The dynamics of spontaneous cooperative emission in a cavity was investigated by numerical solution of semiclassical Maxwell-Bloch equations without slowly varying envelope approximation (in spatial variable). The dependencies of the pulse parameters on the resonator characteristics under condition of high phase relaxation of active medium are ...
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Cooperative Emission of Radiation as a Subordinated Random Process

Journal of Experimental and Theoretical Physics, 2021
Collective emission of radiation by two-level impurities in a complex dielectric medium is represented as a subordinated random process controlled by an alpha-stable process with parameter α determined by characteristic radiation damping times. The differences from conventional superradiance are determined.
A. M. Basharov, A. I. Trubilko
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Negative Emission Technologies and Climate Cooperation

SSRN Electronic Journal
Negative Emissions Technologies (NETs) — a range of methods to remove carbon dioxide from the atmosphere— are a crucial innovation in meeting temperature targets set by international climate agreements. However, mechanisms which undo the adverse consequences of short-sighted actions (as NETs) can fuel substitution effects and crowd out virtuous ...
Boldrini, Michela, Bosetti, Valentina, Nunnari, Salvatore   +2 more
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Cooperative architecture of data acquisition for emission reduction in traffic

2017 25th Telecommunication Forum (TELFOR), 2017
Increasing fuel prices, short-term inventories with CO2 emission growth worldwide have contributed to the development of technology in auto industry. Many advanced technologies in the auto industry have emerged in the last decade, but with little focus on driver behavior to reduce fuel consumption.
Vojvodić, Hrvoje, Vujić, Miroslav, Škorput, Pero   +2 more
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Cooperative Two-Photon Emission in the Microcavity

1997
The one photon cooperative emission in the microcavity is very well studied in the literature [1- 4 ]. In such processes it the amplification and inhibition of spontaneous emission in function of the geometrical dimensions of microcavity are possible.
N. A. Enaki, M. A. Macovei
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Cooperative Effects in Spontaneous Emission

1973
We discuss the cooperative superradiant decay of N two-level atoms contained in a pencil-shaped volume. The Dicke “coherence brightening” - i.e. the emission of a hyperbolic secant pulse whose intensity is proportional to N2 and whose time duration is inversely proportional to N - occurs instead of the usual exponential decay under the following ...
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Fluctuation of Polarized Light in Cooperative Spontaneous Emission

Journal of the Physical Society of Japan, 1981
Macroscopic fluctuation of superradiance most sensitively appears as the fluctuation of the polarized photon number. This fluctuation is not much affected by unexpected variation of the exciting pulse area. In the superradiance limit the relative fiuctuation of the polarized photon number is equal to \(\sqrt{1/3}\), and it decreases rapidly as the ...
Takeshi BABA, Kensuke IKEDA
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The general solution of cooperative emission in arbitrary dimension

Frontiers in Optics 2014, 2014
We study fluorescence of emitters coupled to radiation fields allowing for arbitrary interatomic spacing, dipole orientations, and spatial dimension, including the first study of two dimensions. The asymptotic analysis shows coherence increases with reduced dimension.
Tyler Hill, Barry C. Sanders, Hui Deng
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