Secret quantum communication of a reference frame.
نویسندگان
چکیده
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.
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عنوان ژورنال:
- Physical review letters
دوره 98 12 شماره
صفحات -
تاریخ انتشار 2007