15 citations · 19 across the 6 of their papers we have counts for
6 papers
Entanglement purification of multi-mode quantum states
J Clausen, L Knoell, D-G Welsch
An iterative random procedure is considered allowing an entanglement purification of a class of multi-mode quantum states. In certain cases, a complete purification may be achieved…
Quantum state conversion by cross-Kerr interaction
J. Clausen, L. Knoell, D. -G. Welsch
A generalized Mach-Zehnder-type interferometer equipped with cross-Kerr elements is proposed to convert N-photon truncated single-mode quantum states into (N+1)-mode single-photon…
Nonclassical correlations in damped N-solitons
Eduard Schmidt, Ludwig Knoell, Dirk-Gunnar Welsch
The quantum statistics of damped higher-order optical solitons are analyzed numerically, using cumulant-expansion techniques in Gaussian approximation. A detailed analysis of noncl…
Conditional quantum state engineering at beam splitter arrays
J. Clausen, M. Dakna, L. Knoell +1
The generation of arbitrary single-mode quantum states from the vacuum by alternate coherent displacement and photon adding as well as the measurement of the overlap of a signal wi…
Spontaneous decay in the presence of absorbing dielectric bodies
Stefan Scheel, Ludwig Knoell, Dirk-Gunnar Welsch
We present a formalism for studying the influence of dispersive and absorbing dielectric bodies on a radiating atom in the framework of quantization of the phenomenological Maxwell…
Radiation field quantization in a nonlinear dielectric with dispersion and absorption
Eduard Schmidt, Ludwig Knoell, Dirk-Gunnar Welsch
The problem of quantizing the radiation field inside a nonlinear dielectric is studied. Based on the quantization of radiation in a linear dielectric which includes absorption and…