Location-Oblivious Data Transfer with Flying Entangled Qudits

Details Location-Oblivious Data Transfer with Flying Entangled Qudits Location-Oblivious Data Transfer with Flying Entangled Qudits

2011-02-14

arxiv.org/abs/1102.2816v2

Phys. Rev. A 84, 012328 (2011)

Physics

Quantum Physics

References updated. Published version

Scientific paper

We present a simple and practical quantum protocol involving two mistrustful agencies in Minkowski space, which allows Alice to transfer data to Bob at a spacetime location that neither can predict in advance. The location depends on both Alice's and Bob's actions. The protocol guarantees unconditionally to Alice that Bob learns the data at a randomly determined location; it guarantees to Bob that Alice will not learn the transfer location even after the protocol is complete. The task implemented, transferring data at a space-time location that remains hidden from the transferrer, has no precise analogue in non-relativistic quantum cryptography. It illustrates further the scope for novel cryptographic applications of relativistic quantum theory.

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