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17 papers · 2 filters
Decay of an excited atom near an absorbing microsphere
Ho Trung Dung, Ludwig Knöll, Dirk-Gunnar Welsch
Spontaneous decay of an excited atom near a dispersing and absorbing microsphere of given complex permittivity that satisfies the Kramers-Kronig relations is studied, with special…
Coupled cavities for enhancing the cross-phase modulation in electromagnetically induced transparency
T. Opatrny, D. -G. Welsch
We propose an optical double-cavity resonator whose response to a signal is similar to that of an Electromagnetically Induced Transparency (EIT) medium. A combination of such a dev…
Zeno and anti-Zeno effects for photon polarization dephasing
A. G. Kofman, G. Kurizki, T. Opatrny
We discuss a simple, experimentally feasible scheme, which elucidates the principles of controlling ("engineering") the reservoir spectrum and the spectral broadening incurred by r…
On the equivalence of the Langevin and auxiliary field quantization methods for absorbing dielectrics
A. Tip, L. Knoll, S. Scheel +1
Recently two methods have been developed for the quantization of the electromagnetic field in general dispersing and absorbing linear dielectrics. The first is based upon the intro…
Entanglement transformation at dielectric four-port devices
S. Scheel, L. Knoll, T. Opatrny +1
Quantum communication schemes widely use dielectric four-port devices as basic elements for constructing optical quantum channels. Since for causality reasons the permittivity is n…
Matter-wave entanglement and teleportation by molecular dissociation and collisions
T. Opatrny, G. Kurizki
We propose dissociation of cold diatomic molecules as a source of atom pairs with highly correlated (entangled) positions and momenta, approximating the original quantum state intr…