Work

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

Year: 2002

Type: article

Abstract: 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.

Source: Physical Review A

DOI: 10.1103/physreva.65.042304

Authors: Stephen D. Bartlett, Barry C. Sanders

Institutions: Macquarie University, Japan Science and Technology Agency, Stanford University

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Macquarie University, Australian Research Council

OpenAlex ID: W2011527952

FWCI: 3.853

Cites: 17

Cited by: 167

Related to: 10