Uncertainty In Quantum Computation

Details Uncertainty In Quantum Computation Uncertainty In Quantum Computation

2002-06-02

arxiv.org/abs/quant-ph/0206006v1

Physics

Quantum Physics

6 pages

Scientific paper

We examine the effect of previous history on starting a computation on a quantum computer. Specifically, we assume that the quantum register has some unknown state on it, and it is required that this state be cleared and replaced by a specific superposition state without any phase uncertainty, as needed by quantum algorithms. We show that, in general, this task is computationally impossible.

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