We propose a covariant protocol for transmitting reference frames encoded on N spins, achieving sensitivity N^{-2} without the need of a preestablished reference frame and without using entanglement between sender and receiver. The protocol exploits the use of equivalent representations that were overlooked in the previous literature.
Efficient use of quantum resources for the transmission of a reference frame
M F Sacchi
2004
Abstract
We propose a covariant protocol for transmitting reference frames encoded on N spins, achieving sensitivity N^{-2} without the need of a preestablished reference frame and without using entanglement between sender and receiver. The protocol exploits the use of equivalent representations that were overlooked in the previous literature.File in questo prodotto:
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