Blind quantum computation for Alice who does only measurements

Details Blind quantum computation for Alice who does only measurements Blind quantum computation for Alice who does only measurements

2012-01-19

arxiv.org/abs/1201.3966v1

Physics

Quantum Physics

11 pages, 3 figures

Scientific paper

Blind quantum computation is a secure quantum computing protocol which enables Alice who does not have sufficient quantum technology to ask Bob to perform quantum computation on Bob's fully-fledged quantum computer in such a way that Bob cannot learn anything about Alice's input, output, and algorithm. In previous proposals, Alice needs to have a device which generates quantum states, such as single-photon states. Here we show that Alice who does only measurements, such as the polarization measurements with a threshold detector, can perform the blind quantum computation. In several experimental setups, such as optical systems, the measurement of a state is much easier than the generation of a single-qubit state. Therefore our protocols can ease Alice's burden. Furthermore, the security of our protocols is device independent in the sense that Alice does not need to trust her measurement device. Finally, the security of our protocols is based on the no-signaling principle, which is more fundamental than quantum physics.

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