Detecting Lower Bounds to Quantum Channel Capacities.
We propose a method to detect lower bounds to quantum capacities of a noisy quantum communication channel by means of a few measurements. The method is easily implementable and does not require any knowledge about the channel. We test its efficiency by studying its performance for most well-known single-qubit noisy channels and for the generalized Pauli channel in an arbitrary finite dimension.
Quit group, Dipartimento di Fisica, Università di Pavia, via A. Bassi 6, I-27100 Pavia, Italy.|Istituto Nazionale di Fisica Nucleare, Gruppo IV, via A. Bassi 6, I-27100 Pavia, Italy.
Chiara
C
Macchiavello
Quit group, Dipartimento di Fisica, Università di Pavia, via A. Bassi 6, I-27100 Pavia, Italy.|Istituto di Fotonica e Nanotecnologie-CNR, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy.
Massimiliano F
MF
Sacchi