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Title: Device-independent certification of the teleportation of a qubit
Authors: Ho, M.
Bancal, J.-D.
Scarani, V. 
Issue Date: 18-Nov-2013
Citation: Ho, M., Bancal, J.-D., Scarani, V. (2013-11-18). Device-independent certification of the teleportation of a qubit. Physical Review A - Atomic, Molecular, and Optical Physics 88 (5) : -. ScholarBank@NUS Repository.
Abstract: We want to certify in a black-box scenario that two parties simulating the teleportation of a qubit are really using quantum resources. If active compensation is part of the simulation, perfect teleportation can be faked by purely classical means. If active compensation is not implemented, a classical simulation is necessarily imperfect: In this case, we provide bounds for the certification of quantumness using only the observed statistics. In particular, if a uniform shrinking of the Bloch vector is observed on the teleported side, an average teleportation fidelity of 85% guarantees the use of quantum resources. In general, the criterion is not simply related to the fidelity; in an extreme case, the assessment of quantumness can be positive even for an average fidelity as low as 50%. © 2013 American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
ISSN: 10502947
DOI: 10.1103/PhysRevA.88.052318
Appears in Collections:Staff Publications

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