Journal
PHYSICAL REVIEW A
Volume 78, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.78.063832
Keywords
atom-photon collisions; eigenvalues and eigenfunctions; excited states; ground states; optical waveguides; quantum interference phenomena; quantum optics; spontaneous emission
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Funding
- Research Grants Council of Hong Kong
- Special Administrative Region of China [401408]
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We investigate the interaction between a single photon and a chain of N equally spaced two-level atoms inside a one-dimensional waveguide. By solving the eigenvectors of the Hamiltonian in the subspace with a single excitation, we address quantum interference effects in two physical processes. First, we analyze the scattering of a single photon when atoms are all initially at their ground states. We discover a set of transmission peaks determined by N. These transmission peaks are narrow and sensitive to the relative position between atoms. Second, we examine the spontaneous emission of a photon from an excited atom in the chain in vacuum. The characteristic atomic decay rates are found to be enhanced and reduced by increasing the number of atoms. In particular, the slowest decay rate scales approximately as N-3.
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