Abstract
Starting from a rudimentary quantum-networks model that consists of two two-level confined atoms locating respectively in spatially-separated cavities coupled by fiber, we investigate the complex entanglement characteristics of the composite system analytically under the maximally initial entangled state that generates two excitations simultaneously during the temporal-evolution process. Our calculation clearly shows that, through mediating the atom-cavity coupling strength and photon-photon hopping rate appropriately, the entanglement dynamics displays some distinctive temporal properties differing from those obtained in one-excitation space, characterized partially by these newly quantum phenomena termed as entanglement sudden death and recurrence. Effectively, within the framework of two excitations, we suggest the purposeful manipulations of atomic entanglement communication for quantum networks.
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Yu, X., Li, J. & Li, X. Atom-atom entanglement characteristics in fiber-connected cavities system within the double-excitation space. Sci. China Phys. Mech. Astron. 55, 1813–1819 (2012). https://doi.org/10.1007/s11433-012-4851-1
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DOI: https://doi.org/10.1007/s11433-012-4851-1