A Simple Quantum Computer

Details A Simple Quantum Computer A Simple Quantum Computer

1995-05-22

arxiv.org/abs/quant-ph/9505011v1

Physics

Quantum Physics

8 pages RevTeX + 6 figures in postscript

Scientific paper

10.1103/PhysRevA.52.3489

We propose an implementation of a quantum computer to solve Deutsch's problem, which requires exponential time on a classical computer but only linear time with quantum parallelism. By using a dual-rail qubit representation as a simple form of error correction, our machine can tolerate some amount of decoherence and still give the correct result with high probability. The design which we employ also demonstrates a signature for quantum parallelism which unambiguously delineates the desired quantum behavior from the merely classical. The experimental demonstration of our proposal using quantum optical components calls for the development of several key technologies common to single photonics.

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