How big is a quantum computer?

Details How big is a quantum computer? How big is a quantum computer?

2000-09-17

arxiv.org/abs/quant-ph/0009069v1

Physics

Quantum Physics

4 pages, 1 figure

Scientific paper

Accounting for resources is the central issue in computational efficiency. We point out physical constraints implicit in information readout that have been overlooked in classical computing. The basic particle-counting mode of read-out sets a lower bound on the resources needed to implement a quantum computer. As a consequence, computers based on classical waves are as efficient as those based on single quantum particles.

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