Deterministic Teleportation and Universal Computation Without Particle Exchange

• URL: http://arxiv.org/abs/2009.05564v4
• Date: Tue, 21 Sep 2021 14:31:32 GMT
• Title: Deterministic Teleportation and Universal Computation Without Particle Exchange
• Authors: Hatim Salih, Jonte R. Hance, Will McCutcheon, Terry Rudolph, and John Rarity
• Abstract summary: Teleportation is a cornerstone of quantum technologies, and has played a key role in the development of quantum information theory. Here, we apply a different aspect of quantumness to teleportation -- namely exchange-free computation at a distance. The controlled-phase universal gate we propose, allows complete Bell detection among two remote parties, and is experimentally feasible.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Teleportation is a cornerstone of quantum technologies, and has played a key role in the development of quantum information theory. Pushing the limits of teleportation is therefore of particular importance. Here, we apply a different aspect of quantumness to teleportation -- namely exchange-free computation at a distance. The controlled-phase universal gate we propose, where no particles are exchanged between control and target, allows complete Bell detection among two remote parties, and is experimentally feasible. Our teleportation-with-a-twist, which we extend to telecloning, then requires no pre-shared entanglement nor classical communication between sender and receiver, with the teleported state gradually appearing at its destination.

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