Probabilistic instantaneous quantum computation

Details Probabilistic instantaneous quantum computation Probabilistic instantaneous quantum computation

2001-09-04

arxiv.org/abs/quant-ph/0109022v2

Phys. Rev. A 67, 034304 (2003)

Physics

Quantum Physics

4 pages, 1 figure

Scientific paper

10.1103/PhysRevA.67.034304

The principle of teleportation can be used to perform a quantum computation even before its quantum input is defined. The basic idea is to perform the quantum computation at some earlier time with qubits which are part of an entangled state. At a later time a generalized Bell state measurement is performed jointly on the then defined actual input qubits and the rest of the entangled state. This projects the output state onto the correct one with a certain exponentially small probability. The sufficient conditions are found under which the scheme is of benefit.

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