Universal continuous-variable quantum computation: Requirement of optical nonlinearity for photon counting
量子物理
2007-05-23 v2
摘要
Although universal continuous-variable quantum computation cannot be achieved via linear optics (including squeezing), homodyne detection and feed-forward, inclusion of ideal photon counting measurements overcomes this obstacle. These measurements are sometimes described by arrays of beam splitters to distribute the photons across several modes. We show that such a scheme cannot be used to implement ideal photon counting and that such measurements necessarily involve nonlinear evolution. However, this requirement of nonlinearity can be moved "off-line," thereby permitting universal continuous-variable quantum computation with linear optics.
引用
@article{arxiv.quant-ph/0110039,
title = {Universal continuous-variable quantum computation: Requirement of optical nonlinearity for photon counting},
author = {Stephen D. Bartlett and Barry C. Sanders},
journal= {arXiv preprint arXiv:quant-ph/0110039},
year = {2007}
}
备注
6 pages, no figures, replaced with published version