43,791 research outputs found
Chiral symmetry restoration and deconfinement in Coulomb Gauge QCD
In the framework of Coulomb Gauge QCD we explore dynamical breaking of chiral
symmetry and screening of the confinement potential at finite density. The
screened potential is applied in study of charmonium dissociation.Comment: 7 pages, 8 figure
Parity-Time Anti-Symmetric Parametric Amplifier
We describe the process of parametric amplification in a directional coupler
of quadratically nonlinear and lossy waveguides, which belong to a class of
optical systems with spatial parity-time (PT) symmetry in the linear regime. We
identify a distinct spectral parity-time anti-symmetry associated with optical
parametric interactions, and show that pump-controlled symmetry breaking can
facilitate spectrally selective mode amplification in analogy with PT lasers.
We also establish a connection between breaking of spectral and spatial mode
symmetries, revealing the potential to implement unconventional regimes of
spatial light switching through ultrafast control of PT breaking by pump
pulses.Comment: 5 pages, 5 figure
Scheme for preparation of mulipartite entanglement of atomic ensembles
We describe an experimental scheme of preparing multipartite W class of
maximally entangled states between many atomic ensembles. The scheme is based
on laser manipulation of atomic ensembles and single-photon detection, and well
fits the status of the current experimental technology. In addition, we show
one of the applications of the kind of W class states, teleporting an entangled
state of atomic ensembles with unknown coefficients to more than one distant
parties, either one of which equally likely receives the transmitted state.Comment: 4 pages, 3 figure
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