Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1980. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE. / Vita. / Bibliography: leaves 211-214. / by Peter Eric Bosted. / Ph.D.

In this thesis, we explore the quantum dynamics of light interactions with optically thick collections of atoms. We provide a theoretical description of several recent experiments in which some key operations necessary for the implementation of quantum communication networks are demonstrated. Collective Raman scattering from an atomic ensemble is shown to produce probabilistic entanglement between the polarization of a scattered photon and an associated collective atomic excitation. The predicted correlations agree with experimental observations. We also propose a method to use cascade transitions to produce entanglement between a photon with a frequency in the telecom range (ideal for transmission over optical fibers) and a near infrared photon (ideal for storage in an atomic ensemble), and a description of the experimental demonstration is provided. We also propose and describe the implementation of a deterministic source of single photons. In addition, we generalize the theory of dark-state polaritons in ensembles of three level Lambda atoms to account for the nuclear spin degeneracy of alkali atoms. This generalized theory provides a description of the first demonstration of single photon storage and retrieval from atomic ensembles. Additionally, in the presence of a uniform magnetic field, we predict the occurrence of collapses and revivals of the photon retrieval efficiency as a function of storage time within the ensemble. These predictions are in very good agreement with subsequent experimental observations. We also exploit the ability of photon storage to entangle remote atomic qubits.

No description available.

Thesis (Ph.D) -- University of Western Sydney, 2007. / A thesis submitted to the University of Western Sydney, College of Health and Science, School of Engineering, in satisfaction of the requirements for the degree of Doctor of Philosophy. Includes bibliography.

Thesis (Ph. D. in Physics)--University of California, Berkeley, June 1955. / "Unclassified Physics." Includes bibliographical references (p. 74-75). 36

Thesis (Ph. D.)--Physics, Georgia Institute of Technology, 2007. / You Li, Committee Chair ; Citrin David, Committee Member ; Kuzmich Alex, Committee Member ; Fox Ronald, Committee Member ; Chapman Michael, Committee Member.

Thesis (Ph. D.)--Florida State University, 2006. / Advisors: Vasken Hagopian, Sharon Hagopian, Florida State University, College of Arts and Sciences, Dept. of Physics. Title and description from dissertation home page (viewed Sept. 15, 2005). Document formatted into pages; contains xiv, 155 pages. Includes bibliographical references.

Thesis (Ph. D.)--University of Chicago, Dept. of Physics, December 2000. / Includes bibliographical references. Also available on the Internet.

Made available in DSpace on 2014-10-09T12:51:43Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:10:34Z (GMT). No. of bitstreams: 0 / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

Made available in DSpace on 2014-10-09T12:51:43Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:10:34Z (GMT). No. of bitstreams: 0 / Medidas das secções de choque de fotonêutrons do 9Be, 13C e 17O foram obtidas no intervalo de energia entre 1,6 e 10,8 MeV, utilizando radiação gama de alta resolução em energia (3 a 21 eV) produzida na captura de nêutrons térmicos por 21 materiais alvo, quando posicionados no interior de um canal tangencial, junto ao núcleo do reator de pesquisa IEAR1 (5 MW) do IPEN/CNEN-SP. As amostras foram irradiadas no interior de um sistema detector de nêutrons “Long Counter”, de geometria 4π, a 520,5 cm de distância do alvo de captura. O fluxo de raios gama foi determinado por meio da análise do espectro gama obtido fazendo uso de um detector de estado sólido do tipo Ge(Li) (EG&G ORTEC, 25 cm3, 5%), previamente calibrado com raios gama de captura produzidos por uma amostra padrão de nitrogênio (Melamina). A secção de choque de fotonêutron foi medida para o espectro de raios gama de captura de cada alvo (secção de choque composta). Uma metodologia de inversão de matrizes para a resolução de problemas inverso discretos foi utilizada para a deconvolução do conjunto de valores experimentais da secção de choque composta, com a finalidade de obter a secção de choque em valores específicos de energia de excitação (energia das linhas gama principais dos alvos de captura). As secções de choque obtidas, nas energias das linhas gama principais de todos os alvos, foram comparadas com as medidas realizadas por outros autores utilizando diferentes fontes de radiação gama. Uma boa concordância foi observada entre os resultados experimentais deste trabalho com as relatados na literatura. / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP