Universal continuous-variable quantum computation: Requirement of optical nonlinearity for photon counting

被引：129

作者：

Bartlett, SD ^{[1
]}

Sanders, BC

机构：

[1] Macquarie Univ, Dept Phys, Sydney, NSW 2109, Australia

[2] Macquarie Univ, Ctr Adv Comp Algorithms & Crystallog, Sydney, NSW 2109, Australia

[3] Stanford Univ, Edward L Ginzton Lab, JST, ICORP,Quantum Entanglement Project, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW A | 2002年 / 65卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.65.042304

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

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

页数：5

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