Bounding the Classical Capacity of Multilevel Damping Quantum Channels
Authors: Macchiavello C., Sacchi MF., Sacchi T.
Autors Affiliation: Univ Pavia, Dipartimento Fis, QUit Grp, Via A Bassi 6, I-27100 Pavia, Italy; Ist Nazl Fis Nucl, Grp 4, Sez Pavia, Via A Bassi 6, I-27100 Pavia, Italy; CNR, Ist Nazl Ott, Largo E Fermi 6, I-50125 Florence, Italy; CNR, Ist Foton & Nanotecnol, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy; Ist Super Taramelli Foscolo, Via L Mascheroni 51, I-27100 Pavia, Italy
Abstract: A recent method to detect lower bonds to the classical capacity of quantum communication channels is applied for general damping channels in finite dimensiond>2. The method compares the mutual information obtained by coding on the computational basis and on a Fourier basis, which can be obtained by just two local measurement settings and classical optimization. The results for large representative classes of different damping structures for high dimensional quantum systems are presented.
Journal/Review: ADVANCED QUANTUM TECHNOLOGIES
Volume: 3 (11) Pages from: 2000013 to: 2000013