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We propose a novel, passive, nonintrusive method to measure the one-way delay of all the packets flowing between customer sites connected by a provider backbone. Our approach does not sample traffic and requires the injection of a negligible amount of control packets, possibly none. This is obtained by deploying a Measurement Agent in each customer site and exploiting a covert channel to carry information...
A class of quantum protocols to teleport bipartite (entangled) states of two qubits is suggested. Our schemes require a single entangled pair shared by the two parties and the transmission of three bits of classical information, as well as a two-qubit gate with an additional qubit at the receiver's location. Noisy quantum channels are considered and the effects on both the teleportation fidelity and...
We investigate the interaction of a moving BEC with a far detuned laser beam. Superradiant Rayleigh scattering arises from the spontaneous formation of a matter-wave grating due to the interference of two wavepackets with different momenta. The system is described by the CARL-BEC model which is a generalization of the Gross-Pitaevskii model to include the self-consistent evolution of the scattered...
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