Quantum cost for sending entanglement

Details Quantum cost for sending entanglement Quantum cost for sending entanglement

2012-03-06

arxiv.org/abs/1203.1264v2

Physics

Quantum Physics

Added a reference to the related article arXiv:1203.1268 by T. K. Chuan et al

Scientific paper

Establishing quantum entanglement between two distant parties is an essential step of many protocols in quantum information processing. One possibility for providing long-distance entanglement is to create an entangled composite state within a lab and then physically send one subsystem to a distant lab. However, is this the "cheapest" way? Here, we investigate the minimal "cost" that is necessary for establishing a certain amount of entanglement between two distant parties. We prove that this cost is intrinsically quantum, and is specified by quantum correlations. Our results provide an optimal protocol for entanglement distribution and show that quantum correlations are the essential resource for this task.

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