2009/02/28 by R. M. Rajapakse, R.M.G. Rajapakse, T. Bragdon +6 · 1 citation
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Dipole #Eigenvalues and eigenvectors #Nonlinear system #Optics #Photon #Physics #Polar #Polariton #Quantum #Quantum Information and Cryptography #Quantum decoherence #Quantum mechanics #Quantum optics #Quantum optics and atomic interactions #quant-ph
paper · pdf · doi:10.1103/physreva.80.013810
8 pages, 9 figures Accepted for publication in Physical Review A
arxiv created 2009/06/16 · openalex publication_date 2009/07/15 · arxiv updated 2013/05/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We model single-photon nonlinearities resulting from the dipole-dipole interactions of cold polar molecules. We propose utilizing ``dark state polaritons'' to effectively couple photon and molecular states; through this framework, coherent control of the nonlinearity can be expressed and potentially used in an optical quantum computation architecture. Due to the dipole-dipole interaction the photons pick up a measurable nonlinear phase even in the single-photon regime. A manifold of protected symmetric eigenstates is used as basis. Depending on the implementation, major sources of decoherence result from nonsymmetric interactions and phonon dispersion. We discuss the strength of the nonlinearity per photon and the feasibility of this system.