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Quantum walks of correlated photon pairs in two-dimensional waveguide arrays

Quantum walks of correlated photon pairs in two-dimensional waveguide arrays
Quantum walks of correlated photon pairs in two-dimensional waveguide arrays
We demonstrate quantum walks of correlated photons in a 2D network of directly laser written waveguides coupled in a 'swiss cross' arrangement. The correlated detection events show high-visibility quantum interference and unique composite behaviour: strong correlation and independence of the quantum walkers, between and within the planes of the cross. Violations of a classically defined inequality, for photons injected in the same plane and in orthogonal planes, reveal non-classical behaviour in a non-planar structure.
143604
Poulios, Konstantinos
49d916c4-0482-4292-a35f-ee592baaabd5
Keil, Robert
de5e0b96-cf39-4657-bce9-52ca980cd60e
Fry, Daniel
c5cf89a3-cc07-4ebd-89b9-bffc2b5dff24
Meinecke, Jasmin D.A.
73b16976-44d0-4b45-8044-1fe215a20160
Matthews, Jonathan C.F.
27eacbd1-a28e-4cf2-a707-a77a79380a93
Politi, Alberto
cf75c0a8-d34d-4cbe-b9d5-e408c0edeeec
Lobino, Mirko
3a4b0ec9-0578-4f2a-b4d6-c9f2b0aef18e
Gräfe, Markus
52cfa816-d38d-4f1b-bc35-c0c0dfe33254
Heinrich, Matthias
117d43dc-b260-4b3a-a5fa-36cf5856d849
Nolte, Stefan
e2984393-4db7-44e8-a631-8f9d93e57fee
Szameit, Alexander
427efe86-bc7f-4053-9f86-983ff2ac452b
O'Brien, Jeremy L.
03208a26-089b-4212-b691-87f26cff783c
Poulios, Konstantinos
49d916c4-0482-4292-a35f-ee592baaabd5
Keil, Robert
de5e0b96-cf39-4657-bce9-52ca980cd60e
Fry, Daniel
c5cf89a3-cc07-4ebd-89b9-bffc2b5dff24
Meinecke, Jasmin D.A.
73b16976-44d0-4b45-8044-1fe215a20160
Matthews, Jonathan C.F.
27eacbd1-a28e-4cf2-a707-a77a79380a93
Politi, Alberto
cf75c0a8-d34d-4cbe-b9d5-e408c0edeeec
Lobino, Mirko
3a4b0ec9-0578-4f2a-b4d6-c9f2b0aef18e
Gräfe, Markus
52cfa816-d38d-4f1b-bc35-c0c0dfe33254
Heinrich, Matthias
117d43dc-b260-4b3a-a5fa-36cf5856d849
Nolte, Stefan
e2984393-4db7-44e8-a631-8f9d93e57fee
Szameit, Alexander
427efe86-bc7f-4053-9f86-983ff2ac452b
O'Brien, Jeremy L.
03208a26-089b-4212-b691-87f26cff783c

Poulios, Konstantinos, Keil, Robert, Fry, Daniel, Meinecke, Jasmin D.A., Matthews, Jonathan C.F., Politi, Alberto, Lobino, Mirko, Gräfe, Markus, Heinrich, Matthias, Nolte, Stefan, Szameit, Alexander and O'Brien, Jeremy L. (2014) Quantum walks of correlated photon pairs in two-dimensional waveguide arrays. Physical Review Letters, 112 (14), 143604. (doi:10.1103/PhysRevLett.112.143604).

Record type: Article

Abstract

We demonstrate quantum walks of correlated photons in a 2D network of directly laser written waveguides coupled in a 'swiss cross' arrangement. The correlated detection events show high-visibility quantum interference and unique composite behaviour: strong correlation and independence of the quantum walkers, between and within the planes of the cross. Violations of a classically defined inequality, for photons injected in the same plane and in orthogonal planes, reveal non-classical behaviour in a non-planar structure.

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More information

e-pub ahead of print date: 10 April 2014
Published date: 11 April 2014
Organisations: Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 377125
URI: http://eprints.soton.ac.uk/id/eprint/377125
PURE UUID: 854112f6-ff1e-48a0-9d86-a63a2513e71b
ORCID for Alberto Politi: ORCID iD orcid.org/0000-0002-3668-9474

Catalogue record

Date deposited: 26 May 2015 10:42
Last modified: 03 Dec 2019 01:35

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