Efficient Linear Optics Quantum Computation

Details Efficient Linear Optics Quantum Computation Efficient Linear Optics Quantum Computation

2000-06-20

arxiv.org/abs/quant-ph/0006088v1

Physics

Quantum Physics

8 pages

Scientific paper

We investigate the computational power of passive and active linear optical elements and photo-detectors. We show that single photon sources, passive linear optics and photo-detectors are sufficient for implementing reliable quantum algorithms. Feedback from the detectors to the optical elements is required for this implementation. Without feedback, non-deterministic quantum computation is possible. A single photon source sufficient for quantum computation can be built with an active linear optical element (squeezer) and a photo-detector. The overheads associated with using only linear optics appear to be sufficiently low to make quantum computation based on our proposal a viable alternative.

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