976 resultados para QED RADIATIVE-CORRECTIONS


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Supplement to the 1844 report of the Penal Code of Massachusetts by the Massachusetts Commissioners on Criminal Law.

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Mode of access: Internet.

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Apparently an edition made up from the 12 v. ed. of 1825-27, omitting v. 2-4 and 10.

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Vols. 2-12 have imprint: Philadelphia, Lippincott.

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Imprint varies: Huron, S.D., <1950>-1954.

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Includes reports of the Adult Authority; Board of Trustees of the Institution for Women; State Board of Prison Directors; State Prison, San Quentin; State Prison, Folsom; Institution for Men, Chino and Institution for Women, Tehachapi.

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Senior thesis written for Oceanography 445

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We consider the effect of quantum interference on population distribution and photon statistics of a cavity field interacting with dressed states of a strongly driven three-level atom. We analyse three coupling configurations of the cavity field to the driven atom, with the cavity frequency tuned to the outer Rabi sideband, the inner Rabi sideband and the central frequency of the 'singly dressed' three-level atom. The quantum doubly dressed states for each configuration are identified and the population distribution and photon statistics are interpreted in terms of transitions among these dressed states and their populations. We find that the population distribution depends strongly on quantum interference and the cavity damping. For the cavity field tuned to the outer or inner Rabi sidebands the cavity damping induces transitions between the dressed states which are forbidden for the ordinary spontaneous emission. Moreover, we find that in the case of the cavity field coupled to the inner Rabi sideband the population distribution is almost Poissonian with a large average number of photons that can be controlled by quantum interference. This system can be considered as a one-atom dressed-state laser with controlled intensity.

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Multiple emission peaks have been observed from surface passivated PbS nanocrystals displaying strong quantum confinement. The emission spectra are shown to be strongly dependent on the excited-state parity. We also find that intraband energy relaxation from initial states excited far above the band-edge is nearly three orders of magnitude slower than that found in other nanocrystal quantum dots, providing evidence of inefficient energy relaxation via phonon emission. The initial-state parity dependence of the photoluminescent emission properties suggests that energy relaxation from the higher excited states occurs via a radiative cascade, analogous to energy relaxation in atomic systems. Such radiative cascade emission is possible from ideal zero-dimensional semiconductors, where electronic transitions can be decoupled from phonon modes.