LEADER 00000nam  2200361   4500 
001    AAI3459951 
005    20120426105654.5 
008    120426s2011    ||||||||||||||||| ||eng d 
020    9781124710822 
035    (UMI)AAI3459951 
040    UMI|cUMI 
100 1  Rai, Amit 
245 10 Quantum light in novel systems 
300    127 p 
500    Source: Dissertation Abstracts International, Volume: 72-
       09, Section: B, page: 5373 
500    Adviser: Girish Saran Agarwal 
502    Thesis (Ph.D.)--Oklahoma State University, 2011 
520    In this thesis we have focused on the study of various 
       systems which are presently widely studied in different 
       areas of quantum optics and quantum information sciences. 
       These, for example, include the coupled system of photonic
       waveguides which are known to be highly efficient in 
       manipulating the flow of light. The Hamiltonian describing
       the evolution of field mode in coupled waveguides is 
       effectively identical to the well-known tight binding 
       Hamiltonian used in solid state physics. The advantage of 
       waveguide system is the possibility to control various 
       interactions by design and their low decoherence rate. The
       excellent stability offered by coupled waveguides has led 
       to the observation of many key coherent effects such as 
       quantum walk, Bloch oscillation, and discrete Talbot 
       effect. For example, Bloch oscillations have been 
       investigated in coupled waveguides using coherent beam of 
       light. We wanted to inquire whether coherent phenomena 
       such as Bloch oscillations can be possible with incoherent
       single photon sources. We discovered that Bloch 
       oscillations are indeed possible with single photons 
       provided we prepare single photons in a W state. Moreover,
       coupled waveguides also find applications in the field of 
       quantum information processing. Since entanglement plays a
       prominent role in all these applications, it is important 
       to understand the entanglement dynamics in these 
       structures. We considered the case of squeezed input in 
       one of the waveguide and showed that one can generate 
       entanglement between the waveguide modes. We further 
       continued our work on the entanglement generation in 
       coupled waveguides by incorporating the effect of loss in 
       the waveguide structure for the squeezed and photon number
       input states. We considered relevant experimental 
       parameters and showed that waveguide structures are 
       reasonably robust against the effect of loss. Another 
       system which has attracted a great deal of interest is the
       optomechanical system. We consider an optomechanical 
       system where an optical cavity mode is coupled to the 
       square of the position of a mechanical oscillator. The 
       optomechanical system can then be regarded as a quantum 
       optical spring, i.e., a spring whose spring constant 
       depends on the quantum state of another system. In 
       particular, we consider the situation where the field 
       inside the cavity is in a coherent state and the 
       oscillator is prepared in its ground state. The quantized 
       nature of the field produces new features in the 
       optomechanical system 
590    School code: 0664 
650  4 Physics, Quantum 
650  4 Physics, Optics 
690    0599 
690    0752 
710 2  Oklahoma State University.|bPhysics 
773 0  |tDissertation Abstracts International|g72-09B 
856 40 |uhttp://pqdd.sinica.edu.tw/twdaoapp/servlet/