Guang zi yu yuan zi zai lou kong qiang zhong de jiu chan ji qi zai liang zi ji suan zhong de ying yong

Adopting the continuous frequency mode approach and the resolvent method, we study the interaction between atoms and photons in leaky optical cavities. In particular, we highlight the physical significance of quantum states of photons in such processes. Single-photon processes and two-photon processes are intensively investigated. With single-photon scattering, various schemes for generating entangled pairs and constructing quantum gates are developed using two-level atoms or Λ-type atoms. The fidelities of these schemes tend to unity for injected photons with specific spectra. We examine the efficiency of the feedback scheme proposed by Hong and Lee [Phys. Rev. Lett. 89 , 237901 (2002)] to generate maximally entangled states of two atoms in an optical cavity from first principles. We find that the efficiency of the scheme deteriorates gradually and hence other competing processes have to be considered properly. Besides, nonlinearity and entanglement of two-photon states in two-sided and one-sided cavities are analyzed in terms of detection probabilities and frequency-correlation of the left- and right-output photons. We discover that two-photon processes in a one-sided cavity can be exploited to generate two-photon maximally entangled states, from which nonlocal shaping effect in the spectra of the two photons can be demonstrated. Lastly, based on the Fredholm method, an iterative analytical method yielding the Schmidt modes and eigenvalues of an entangled state is proposed and discussed.Fung, Ho Tak = 光子與原子在漏空腔中的糾纏及其在量子計算中的應用 / 馮浩德."May 2008."Adviser: P. T. Leung.Source: Dissertation Abstracts International, Volume: 70-03, Section: B, page: 1736.Thesis (Ph.D.)--Chinese University of Hong Kong, 2008.Includes bibliographical references (p. 155-163).Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web.Abstracts in English and Chinese.School code: 1307.Fung, Ho Tak = Guang zi yu yuan zi zai lou kong qiang zhong de jiu chan ji qi zai liang zi ji suan zhong de ying yong / Feng Haode