1,966 research outputs found
Spatial oscillations in the spontaneous emission rate of an atom inside a metallic wedge
A method of images is applied to study the spontaneous emission of an atom
inside a metallic wedge with an opening angle of , where N is an
arbitrary positive integer. We show the method of images gives a rate formula
consistent with that from Quantum Electrodynamics. Using the method of images,
we show the correspondence between the oscillations in the spontaneous emission
rate and the closed-orbits of emitted photon going away and returning to the
atom inside the wedge. The closed-orbits can be readily constructed using the
method of images and they are also extracted from the spontaneous emission
rate.Comment: 8 figure
Retarded long-range potentials for the alkali-metal atoms and a perfectly conducting wall
The retarded long-range potentials for hydrogen and alkali-metal atoms in
their ground states and a perfectly conducting wall are calculated. The
potentials are given over a wide range of atom-wall distances and the validity
of the approximations used is established.Comment: RevTeX, epsf, 11 pages, 2 fig
Force on a neutral atom near conducting microstructures
We derive the non-retarded energy shift of a neutral atom for two different
geometries. For an atom close to a cylindrical wire we find an integral
representation for the energy shift, give asymptotic expressions, and
interpolate numerically. For an atom close to a semi-infinite halfplane we
determine the exact Green's function of the Laplace equation and use it derive
the exact energy shift for an arbitrary position of the atom. These results can
be used to estimate the energy shift of an atom close to etched microstructures
that protrude from substrates.Comment: 7 pages, 5 figure
Entangled light from Bose-Einstein condensates
We propose a method to generate entangled light with a Bose-Einstein
condensate trapped in a cavity, a system realized in recent experiments. The
atoms of the condensate are trapped in a periodic potential generated by a
cavity mode. The condensate is continuously pumped by a laser and spontaneously
emits a pair of photons of different frequencies in two distinct cavity modes.
In this way, the condensate mediates entanglement between two cavity modes
which leak out and can be separated and exhibit continuous variable
entanglement. The scheme exploits the experimentally demonstrated strong,
steady and collective coupling of condensate atoms to a cavity field.Comment: 5 pages and 5 figure
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