| Quantum computation is in recent decades, the development of quantum mechanics and information science to produce a new cross subject, it is information age offers new opportunities and challenges. Limited by traditional computer hardware upgrade bottleneck, the rise of new quantum computing received high attention from all over the world.At present, Such as cavity-qed?ion trap?superconductor qubit? nuclear magnetic resonance?quantum dot physical systems is considered possible quantum computing.The cavity QED scheme because use photon as the carrier of information storage and processing, operating time is shorter, conducive to quantum communication, which is widely attention.This paper mainly studies the double cavity coupling dynamics model, the main content includes:The first chapter briefly introduces the basic concepts of quantum computing and the basic theory. Including some basic concepts of quantum mechanics and quantum computer implementation of several common scheme is introduced.The second chapter research under control of applied laser, the dynamical behavior of double cavity coupled system with a two-level quantum bit is investigated. According to the system interaction Hamiltonian, the analytical solution of the excited probability of system quantum state is obtained. The dynamic characteristics of the system are discussed by numerical simulation in three specific cases. In the case of applied laser resonating with cavity, bit and cavity field mismatching, the maximum excitation probability of cavity mode is less than 0.07. The cavity mode is in a non-excited state, and the excitation probability of the bit appears instantaneous decay. Under the condition of strong coupling between bit and cavity mode, the excitation probability of cavity mode is approximately 0.5. The cavity mode is in the state of semi-excitation, and the excitation probability of the bit appears high frequency oscillation. The maximum excitation probability of cavity mode is less than 0.07 under the condition of large jumping between cavity fields. The cavity mode is in the non-excited state, and the excitation probability of the bit appears high frequency oscillation.The third chapter mainly discusses the double cavity coupled to the operation of the quantum information in the system, Through analysis on some special parameters under the condition of quantum dynamics characteristic of system, the system of judging the validity of quantum information transfer, and find some through the specific processing of system parameters, in order to achieve the system of selection of quantum information transfer, inspire, and suspend operation way, further discusses the cavity QED scheme for the realization of quantum information operation.The fourth chapter of this thesis research work was summarized and prospected. |
PDF Full Text Request