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Phys Rev Lett. 2003 Jul 11;91(2):027901. Epub 2003 Jul 7.

Classical and quantum communication without a shared reference frame.

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  • 1Department of Physics, Macquarie University, Sydney, New South Wales 2109, Australia. bartlett@ics.mq.edu.au

Abstract

We show that communication without a shared reference frame is possible using entangled states. Both classical and quantum information can be communicated with perfect fidelity without a shared reference frame at a rate that asymptotically approaches one classical bit or one encoded qubit per transmitted qubit. We present an optical scheme to communicate classical bits without a shared reference frame using entangled photon pairs and linear optical Bell state measurements.

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