92 citations · 459 across the 30 of their papers we have counts for
3 papers · 2 filters
Quantum Error Correcting Subsystems are Unitarily Recoverable Subsystems
David W. Kribs, Robert W. Spekkens
We show that every correctable subsystem for an arbitrary noise operation can be recovered by a unitary operation, where the notion of recovery is more relaxed than the notion of c…
Higher-Rank Numerical Ranges of Unitary and Normal Matrices
Man-Duen Choi, John A. Holbrook, David W. Kribs +1
We verify a conjecture on the structure of higher-rank numerical ranges for a wide class of unitary and normal matrices. Using analytic and geometric techniques, we show precisely…
Decoherence-Insensitive Quantum Communication by Optimal C^*-Encoding
Bernhard G. Bodmann, David W. Kribs, Vern I. Paulsen
The central issue in this article is to transmit a quantum state in such a way that after some decoherence occurs, most of the information can be restored by a suitable decoding op…