Lougovski, Pavel (2004): Quantum state engineering and reconstruction in cavity QED: An analytical approach. Dissertation, LMU München: Faculty of Physics 

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Abstract
The models of a stronglydriven micromaser and a oneatom laser are developed. Their analytical solutions are obtained by means of phase space techniques. It is shown how to exploit the model of a oneatom laser for simultaneous generation and monitoring of the decoherence of the atomfield "Schrödinger cat" states. The similar machinery applied to the problem of the generation of the maximallyentangled states of two atoms placed inside an optical cavity permits its analytical solution. The steadystate solution of the problem exhibits a structure in which the twoatom maximallyentangled state correlates with the vacuum state of the cavity. As a consequence, it is demonstrated that the atomic maximallyentangled state, depending on a coupling regime, can be produced via a single or a sequence of nophoton measurements. The question of the implementation of a quantum memory device using a dispersive interaction between the collective internal ground state of an atomic ensemble and two orthogonal modes of a cavity is addressed. The problem of quantum state reconstruction in the context of cavity quantum electrodynamics is considered. The optimal operational definition of the Wigner function of a cavity field is worked out. It is based on the Fresnel transform of the atomic invertion of a probe atom. The general integral transformation for the Wigner function reconstruction of a particle in an arbitrary symmetric potential is derived.
Item Type:  Theses (Dissertation, LMU Munich) 

Subjects:  500 Natural sciences and mathematics 500 Natural sciences and mathematics > 530 Physics 
Faculties:  Faculty of Physics 
Language:  English 
Date of oral examination:  23. September 2004 
1. Referee:  Walther, Herbert 
MD5 Checksum of the PDFfile:  0e75561399212f7adab6abba7ac2182d 
Signature of the printed copy:  0001/UMC 14029 
ID Code:  2638 
Deposited On:  06. Oct 2004 
Last Modified:  24. Oct 2020 11:17 