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Advances in Condensed Matter Physics
Volume 2013 (2013), Article ID 980698, 9 pages
http://dx.doi.org/10.1155/2013/980698
Research Article

Dynamics of the Energy Relaxation and Decoherence of a Photon-Atom Bound State in an Anisotropic Photonic Crystal

1Department of Physics, Chinese Culture University, Taipei 11114, Taiwan
2Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 71150, Taiwan

Received 21 May 2013; Accepted 16 September 2013

Academic Editor: Jörg Fink

Copyright © 2013 Jing-Nuo Wu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An atom embedded inside photonic crystals can form a photon-atom bound state if the emission frequency of the excited atom is lying inside the photonic-band gap of photonic crystals. We studied the dynamics of the energy relaxation and decoherence of a QPAB, qubit made by a photon-atom bound state in photonic crystals. Dynamics of these measurements are solved analytically through the fractional calculus which has been shown to be appropriate mathematical method for the optical systems with non-Markovian dynamics. From these dynamics, we find that the losses of energy, coherence, and information of a QPAB are inhibited. As compared with those qubits without forming photon-atom bound states, the energy relaxation and decoherence rates of these QPABs are strongly suppressed. Other systems suitable for realizing these properties are discussed.