Results 171 to 180 of about 2,656 (211)
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International Journal of Theoretical Physics, 2000
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Mondal, Asit Kumar, Ahmed, Mainuddin
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zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Mondal, Asit Kumar, Ahmed, Mainuddin
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Superradiance: A numerical study
Physical Review A, 1987The full set of Weisskopf-Wigner equations describing the spontaneous radiative decay of a system of up to four excited two-level atoms and many field modes is integrated numerically. Measures of collimation and of photon-photon directional correlation are evaluated and demonstrate the tendency of the photons to form a single ray.
, Duncan, , Stehle
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Microcavity quantum superradiance
Journal of Optics B: Quantum and Semiclassical Optics, 2000Two-dipole superradiance in a planar symmetrical microcavity has been investigated for the first time in the space-time domain by a controlled femtosecond excitation of two ensembles of molecules located at a mutual distance R on the plane parallel to the cavity mirrors.
E. DE ANGELIS +2 more
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Science, 2009
Cooperative single-photon emission from an atom ensemble will provide insights into quantum electrodynamics and applications in quantum communication.
Marlan O. Scully, Anatoly A. Svidzinsky
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Cooperative single-photon emission from an atom ensemble will provide insights into quantum electrodynamics and applications in quantum communication.
Marlan O. Scully, Anatoly A. Svidzinsky
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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
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Superradiance in semiconductors
Semiconductors, 1999The dependences of the characteristic superradiance time in quantum well InGaAs/GaAs laser heterostructures on the pump current, temperature, and cross sections of the active region are studied by analyzing electroluminescence spectra. The number of dipoles involved in forming a superradiant pulse is estimated using elementary equations from the theory
S. V. Zaitsev +7 more
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Superradiant Effects in Photon Echo Decays -The Superradiant Echo
1990Photon echo decays in molecular solids are profoundly influenced by intermolecular interactions. For example, in organic mixed molecular crystals the echo decay is strongly dependent on the impurity concentration.1–4,8 Previous theories2–4 deal mostly with the effect of static dipole-dipole coupling on the echo decay.
Frank C. Spano, W. S. Warren
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Swept-Gain Superradiance: Evolution from the Superradiant State
1984There are contrasts and similarities between swept-gain superradiance1 and Dicke superradiance2, and these have been discussed3,4. The main characteristics of the pulses radiated under conditions supportive of Dicke superradiance are quite similar to those predicted1 and observed5 for swept-Cain superradiance.
C. M. Bowden, F. P. Mattar
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Physica A: Statistical Mechanics and its Applications, 1976
Abstract The fluctuation of the intensity of superradiant pulse is calculated by applying a general asymptotic evaluation method of quantal macrovariables to a superradiant master equation. It is shown that the fluctuation of superradiant intensity is proportional to the cube of the number of the relevant atoms.
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Abstract The fluctuation of the intensity of superradiant pulse is calculated by applying a general asymptotic evaluation method of quantal macrovariables to a superradiant master equation. It is shown that the fluctuation of superradiant intensity is proportional to the cube of the number of the relevant atoms.
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1994
We discuss stationary superradiance from a laser with N identical three-level atoms. Cooperative radiation is made possible by a cavity supporting two modes, each in resonance with an atomic transition. For large N, substantial squeezing results even in the presence of pump fluctuations and spontaneous emission.
F. Haake +4 more
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We discuss stationary superradiance from a laser with N identical three-level atoms. Cooperative radiation is made possible by a cavity supporting two modes, each in resonance with an atomic transition. For large N, substantial squeezing results even in the presence of pump fluctuations and spontaneous emission.
F. Haake +4 more
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