We propose quantum-cryptographic protocols to secretly communicate a reference frame-unspeakable information in the sense it cannot be encoded into a string of bits. Two distant parties can secretly align their Cartesian axes by exchanging N spin-1/2 particles, achieving the optimal accuracy 1/N. A possible eavesdropper cannot gain any information without being detected.
Secret Quantum Communication of a Reference Frame
CHIRIBELLA, GIULIO;MACCONE, LORENZO;PERINOTTI, PAOLO
2007-01-01
Abstract
We propose quantum-cryptographic protocols to secretly communicate a reference frame-unspeakable information in the sense it cannot be encoded into a string of bits. Two distant parties can secretly align their Cartesian axes by exchanging N spin-1/2 particles, achieving the optimal accuracy 1/N. A possible eavesdropper cannot gain any information without being detected.File in questo prodotto:
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