1,430,940 research outputs found
Results from Lattice QCD
I present our recent results on the critical end point in the \mu_B-T phase
diagram of QCD with two flavours of light dynamical quarks and compare them
with similar results from other groups. Implications for a possible energy scan
at the RHIC are discussed. I also comment briefly on the new results of great
relevance to heavy ion collisions from finite temperature lattice QCD
simulations on speed of sound, specific heat and on the fate of J/\psi.Comment: Invited Plenary Talk given at 5th International Conference on Physics
and Astrophysics of Quark Gluon Plasma, Kolkata, India, February 8-12, 2005;
LaTeX in Journal of Physics G style; 9 pages including figure
Dynamical Casimir Effect in two-atom cavity QED
We study analytically and numerically the dynamical Casimir effect in a
cavity containing two stationary 2-level atoms that interact with the resonance
field mode via the Tavis-Cummings Hamiltonian. We determine the modulation
frequencies for which the field and atomic excitations are generated and study
the corresponding dynamical behaviors in the absence of damping. It is shown
that the two-atom setup allows for monitoring of photon generation without
interrupting the growth, and different entangled states can be generated during
the process.Comment: 4+ pages, 2 figure
Approximate analytical results on the cavity dynamical Casimir effect in the presence of a two-level atom
We study analytically the photon generation from vacuum due to the Dynamical
Casimir effect in a cavity with a two-level atom, prepared initially in an
arbitrary pure state. Performing small unitary transformations we obtain closed
analytical expressions for the probability amplitudes and other important
quantities in the resonant/dispersive regimes.Comment: 5 pages, 2 figure
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