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12 papers · 2 filters
Physics as quantum information processing
Giacomo Mauro D'Ariano
The experience from Quantum Information has lead us to look at Quantum Theory (QT) and the whole Physics from a different angle. The information-theoretical paradigm---"It from Bit…
Achieving the Holevo bound via sequential measurements
Vittorio Giovannetti, Seth Lloyd, Lorenzo Maccone
We present a new decoding procedure to transmit classical information in a quantum channel which, saturating asymptotically the Holevo bound, achieves the optimal rate of the commu…
Sequential projective measurements for channel decoding
Seth Lloyd, Vittorio Giovannetti, Lorenzo Maccone
We study the transmission of classical information in quantum channels. We present a decoding procedure that is very simple but still achieves the channel capacity. It is used to g…
Purification of noisy quantum measurements
M. Dall'Arno, G. M. D'Ariano, M. F. Sacchi
We consider the problem of improving noisy quantum measurements by suitable preprocessing strategies making many noisy detectors equivalent to a single ideal detector. For observab…
Optimal unambiguous comparison of two unknown squeezed vacua
Stefano Olivares, Michal Sedlak, Peter Rapcan +2
We propose a scheme for unambiguous state comparison (USC) of two unknown squeezed vacuum states of an electromagnetic field. Our setup is based on linear optical elements and phot…
Teleportation transfers only speakable quantum information
G. Chiribella, V. Giovannetti, L. Maccone +1
We show that a quantum clock cannot be teleported without prior synchronization between sender and receiver: every protocol using a finite amount of entanglement and an arbitrary n…