5,381 research outputs found
Modified dispersion relations and black hole physics
A modified formulation of energy-momentum relation is proposed in the context
of doubly special relativity. We investigate its impact on black hole physics.
It turns out that such modification will give corrections to both the
temperature and the entropy of black holes. In particular this modified
dispersion relation also changes the picture of Hawking radiation greatly when
the size of black holes approaching the Planck scale. It can prevent black
holes from total evaporation, as a result providing a plausible mechanism to
treat the remnant of black holes as a candidate for dark matter.Comment: 4 pages, Revtex. Final version to appear in PR
Charge Qubit Storage and Its Engineered Decoherence via Microwave Cavity
We study the entanglement of the superconducting charge qubit with the
quantized electromagnetic field in a microwave cavity. It can be controlled
dynamically by a classical external field threading the SQUID within the charge
qubit. Utilizing the controllable quantum entanglement, we can demonstrate the
dynamic process of the quantum storage of information carried by charge qubit.
On the other hand, based on this engineered quantum entanglement, we can also
demonstrate a progressive decoherence of charge qubit with quantum jump due to
the coupling with the cavity field in quasi-classical state.Comment: 6 pages, 4 figure
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