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Generating, manipulating and measuring entanglement and mixture with a reconfigurable photonic circuit

Generating, manipulating and measuring entanglement and mixture with a reconfigurable photonic circuit
Generating, manipulating and measuring entanglement and mixture with a reconfigurable photonic circuit
Entanglement is the quintessential quantum mechanical phenomenon understood to lie at the heart of future quantum technologies and the subject of fundamental scientific investigations. Mixture, resulting from noise, is often an unwanted result of interaction with an environment, but is also of fundamental interest, and is proposed to play a role in some biological processes. Here we report an integrated waveguide device that can generate and completely characterize pure two-photon states with any amount of entanglement and arbitrary single-photon states with any amount of mixture. The device consists of a reconfigurable integrated quantum photonic circuit with eight voltage controlled phase shifters. We demonstrate that for thousands of randomly chosen configurations the device performs with high fidelity. We generate maximally and non-maximally entangled states, violate a Bell-type inequality with a continuum of partially entangled states, and demonstrate generation of arbitrary one-qubit mixed states.
quantum physics
1749-4885
45-49
Shadbolt, Peter J.
0bd39b9b-187b-4676-be47-108ec78d2dbb
Verde, Maria Rodas
431f284d-9806-4a51-bc99-1ea1c56cebe6
Peruzzo, Alberto
01b3682e-f137-40ca-8a9b-1dacf59ab0a6
Politi, Alberto
cf75c0a8-d34d-4cbe-b9d5-e408c0edeeec
Laing, Anthony
785153da-477d-4605-b117-f56836ce9056
Lobino, Mirko
3a4b0ec9-0578-4f2a-b4d6-c9f2b0aef18e
Matthews, Jonathan C. F.
78014cb8-b77b-4348-94b4-a64ecf08fb3e
Thompson, Mark G.
c5ee6a35-31e8-4ddd-9744-7b5eb54af38e
O'Brien, Jeremy L.
03208a26-089b-4212-b691-87f26cff783c
Shadbolt, Peter J.
0bd39b9b-187b-4676-be47-108ec78d2dbb
Verde, Maria Rodas
431f284d-9806-4a51-bc99-1ea1c56cebe6
Peruzzo, Alberto
01b3682e-f137-40ca-8a9b-1dacf59ab0a6
Politi, Alberto
cf75c0a8-d34d-4cbe-b9d5-e408c0edeeec
Laing, Anthony
785153da-477d-4605-b117-f56836ce9056
Lobino, Mirko
3a4b0ec9-0578-4f2a-b4d6-c9f2b0aef18e
Matthews, Jonathan C. F.
78014cb8-b77b-4348-94b4-a64ecf08fb3e
Thompson, Mark G.
c5ee6a35-31e8-4ddd-9744-7b5eb54af38e
O'Brien, Jeremy L.
03208a26-089b-4212-b691-87f26cff783c

Shadbolt, Peter J., Verde, Maria Rodas, Peruzzo, Alberto, Politi, Alberto, Laing, Anthony, Lobino, Mirko, Matthews, Jonathan C. F., Thompson, Mark G. and O'Brien, Jeremy L. (2011) Generating, manipulating and measuring entanglement and mixture with a reconfigurable photonic circuit. Nature Photonics, 6 (1), 45-49. (doi:10.1038/nphoton.2011.283).

Record type: Article

Abstract

Entanglement is the quintessential quantum mechanical phenomenon understood to lie at the heart of future quantum technologies and the subject of fundamental scientific investigations. Mixture, resulting from noise, is often an unwanted result of interaction with an environment, but is also of fundamental interest, and is proposed to play a role in some biological processes. Here we report an integrated waveguide device that can generate and completely characterize pure two-photon states with any amount of entanglement and arbitrary single-photon states with any amount of mixture. The device consists of a reconfigurable integrated quantum photonic circuit with eight voltage controlled phase shifters. We demonstrate that for thousands of randomly chosen configurations the device performs with high fidelity. We generate maximally and non-maximally entangled states, violate a Bell-type inequality with a continuum of partially entangled states, and demonstrate generation of arbitrary one-qubit mixed states.

Full text not available from this repository.

More information

Accepted/In Press date: 11 October 2011
Published date: 11 December 2011
Keywords: quantum physics
Organisations: Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 377126
URI: http://eprints.soton.ac.uk/id/eprint/377126
ISSN: 1749-4885
PURE UUID: 4141985f-857e-452a-b357-9541583a2bc8
ORCID for Alberto Politi: ORCID iD orcid.org/0000-0002-3668-9474

Catalogue record

Date deposited: 26 May 2015 10:44
Last modified: 17 Dec 2019 01:36

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