180 citations · 354 across the 5 of their papers we have counts for
5 papers
Lower bounds on entanglement measures from incomplete information
O. Gühne, M. Reimpell, R. F. Werner
How can we quantify the entanglement in a quantum state, if only the expectation value of a single observable is given? This question is of great interest for the analysis of entan…
A Meaner King uses Biased Bases
M. Reimpell, R. F. Werner
The mean king problem is a quantum mechanical retrodiction problem, in which Alice has to name the outcome of an ideal measurement on a d-dimensional quantum system, made in one of…
Estimating entanglement measures in experiments
O. Gühne, M. Reimpell, R. F. Werner
We present a method to estimate entanglement measures in experiments. We show how a lower bound on a generic entanglement measure can be derived from the measured expectation value…
Comment on "Optimum Quantum Error Recovery using Semidefinite Programming"
M. Reimpell, R. F. Werner, K. Audenaert
In a recent paper ([1]=quant-ph/0606035) it is shown how the optimal recovery operation in an error correction scheme can be considered as a semidefinite program. As a possible fut…
Iterative Optimization of Quantum Error Correcting Codes
M. Reimpell, R. F. Werner
We introduce a convergent iterative algorithm for finding the optimal coding and decoding operations for an arbitrary noisy quantum channel. This algorithm does not require any err…