Pseudo-digital quantum bits

Details Pseudo-digital quantum bits Pseudo-digital quantum bits

2002-08-15

arxiv.org/abs/quant-ph/0208105v1

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

10.1063/1.1527692

Quantum computers are analog devices; thus they are highly susceptible to accumulative errors arising from classical control electronics. Fast operation--as necessitated by decoherence--makes gating errors very likely. In most current designs for scalable quantum computers it is not possible to satisfy both the requirements of low decoherence errors and low gating errors. Here we introduce a hardware-based technique for pseudo-digital gate operation. We perform self-consistent simulations of semiconductor quantum dots, finding that pseudo-digital techniques reduce operational error rates by more than two orders of magnitude, thus facilitating fast operation.

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