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Heralding two-photon and four-photon path entanglement on a chip

Heralding two-photon and four-photon path entanglement on a chip
Heralding two-photon and four-photon path entanglement on a chip
Generating quantum entanglement is not only an important scientific endeavor, but will be essential to realizing quantum-enhanced technologies, in particular, quantum-enhanced measurements with precision beyond classical limits. We investigate the heralded generation of multiphoton entanglement for quantum metrology using a reconfigurable integrated waveguide device in which projective measurement of auxiliary photons heralds the generation of path-entangled states. We use four and six-photon inputs, to analyze the heralding process of two- and four-photon NOON states-a superposition of N photons in two paths, capable of enabling phase supersensitive measurements at the Heisenberg limit. Realistic devices will include imperfections; as part of the heralded state preparation, we demonstrate phase superresolution within our chip with a state that is more robust to photon loss
163602
Matthews, Jonathan C.F.
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Politi, Alberto
cf75c0a8-d34d-4cbe-b9d5-e408c0edeeec
Bonneau, Damien
172a75bb-9811-4c82-836c-96acb519cb45
O'Brien, Jeremy L.
03208a26-089b-4212-b691-87f26cff783c
Matthews, Jonathan C.F.
27eacbd1-a28e-4cf2-a707-a77a79380a93
Politi, Alberto
cf75c0a8-d34d-4cbe-b9d5-e408c0edeeec
Bonneau, Damien
172a75bb-9811-4c82-836c-96acb519cb45
O'Brien, Jeremy L.
03208a26-089b-4212-b691-87f26cff783c

Matthews, Jonathan C.F., Politi, Alberto, Bonneau, Damien and O'Brien, Jeremy L. (2011) Heralding two-photon and four-photon path entanglement on a chip. Physical Review Letters, 107 (16), 163602. (doi:10.1103/PhysRevLett.107.163602).

Record type: Article

Abstract

Generating quantum entanglement is not only an important scientific endeavor, but will be essential to realizing quantum-enhanced technologies, in particular, quantum-enhanced measurements with precision beyond classical limits. We investigate the heralded generation of multiphoton entanglement for quantum metrology using a reconfigurable integrated waveguide device in which projective measurement of auxiliary photons heralds the generation of path-entangled states. We use four and six-photon inputs, to analyze the heralding process of two- and four-photon NOON states-a superposition of N photons in two paths, capable of enabling phase supersensitive measurements at the Heisenberg limit. Realistic devices will include imperfections; as part of the heralded state preparation, we demonstrate phase superresolution within our chip with a state that is more robust to photon loss

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PhysRevLett.107.163602 - Version of Record
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Published date: 11 October 2011
Organisations: Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 377115
URI: http://eprints.soton.ac.uk/id/eprint/377115
PURE UUID: 4b3e512d-8cfb-47d5-a016-caaa5c01dd00
ORCID for Alberto Politi: ORCID iD orcid.org/0000-0002-3668-9474

Catalogue record

Date deposited: 22 May 2015 11:04
Last modified: 26 Nov 2019 01:34

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Contributors

Author: Jonathan C.F. Matthews
Author: Alberto Politi ORCID iD
Author: Damien Bonneau
Author: Jeremy L. O'Brien

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