27 citations · 57 across the 8 of their papers we have counts for
8 papers
Parameter estimation for mixed states from a single copy
Thomas Konrad, Otfried Gühne, Jürgen Audretsch +1
Given a single copy of a mixed state of the form ρ=λρ_1+(1-λ)ρ_2, what is the optimal measurement to estimate the parameter λ, if ρ_1 and ρ_2 are known? We present a general strate…
Monitoring Quantum Oscillations with very small Disturbance
Jürgen Audretsch, Felix E. Klee, Thomas Konrad
We present a new scheme to detect and visualize oscillations of a single quantum system in real time. The scheme is based upon a sequence of very weak generalized measurements, dis…
Estimating the post-measurement state
Jürgen Audretsch, Lajos Diósi, Thomas Konrad
We study generalized measurements (POVM measurements) on a single d-level quantum system which is in a completely unknown pure state, and derive the best estimate of the post-measu…
Quantum optical weak measurements can visualize photon dynamics in real time
Jürgen Audretsch, Thomas Konrad, Artur Scherer
An experiment is proposed to visualize stroboscopically in real time the dynamics of a photon oscillating between two cavities. The visualization is implemented by a sequence of we…
Local-field effect in atom optics of two-component Bose-Einstein condensates
K. V. Krutitsky, K. -P. Marzlin, J. Audretsch
Starting from the first principles of nonrelativistic QED we have developed the quantum theory of the interaction of a two-component ultracold atomic ensemble with the electromagne…
Local-field approach to the interaction of an ultracold dense Bose gas with a light field
K. V. Krutitsky, F. Burgbacher, J. Audretsch
The propagation of the electromagnetic field of a laser through a dense Bose gas is examined and nonlinear operator equations for the motion of the center of mass of the atoms are…