Quantum Walks of Correlated Photon Pairs in Two-Dimensional Waveguide Arrays

Kostas Poulios; Robert Keil; Daniel Fry; Jasmin D. A. Meinecke; Jonathan C. F. Matthews; Alberto Politi; Mirko Lobino; Markus Graefe; Matthias Heinrich; Stefan Nolte; Alexander Szameit; Jeremy L. O'Brien

doi:10.1103/PhysRevLett.112.143604

Quantum Walks of Correlated Photon Pairs in Two-Dimensional Waveguide Arrays

Kostas Poulios, Robert Keil, Daniel Fry, Jasmin D. A. Meinecke, Jonathan C. F. Matthews, Alberto Politi, Mirko Lobino, Markus Graefe, Matthias Heinrich, Stefan Nolte, Alexander Szameit, Jeremy L. O'Brien

Research output: Contribution to journal › Article (Academic Journal) › peer-review

106 Citations (Scopus)

Abstract

We demonstrate quantum walks of correlated photons in a two-dimensional network of directly laser written waveguides coupled in a "swiss cross" arrangement. The correlated detection events show high-visibility quantum interference and unique composite behavior: 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 nonclassical behavior in a nonplanar structure.

Original language	English
Article number	143604
Number of pages	5
Journal	Physical Review Letters
Volume	112
Issue number	143604
DOIs	https://doi.org/10.1103/PhysRevLett.112.143604
Publication status	Published - 10 Apr 2014

Structured keywords

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Keywords

Photons
quantum walks
waveguides
photonics
Quantum optics

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10.1103/PhysRevLett.112.143604

http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.112.143604

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3 Finished

Quantum Optics for Integrated Photonic Technologies
Rarity, J. G.
16/06/14 → 15/06/19
Project: Research
Fabricating a photonic quantum computer.
O'Brien, J. L.
1/04/13 → 31/03/18
Project: Research
Beyond Qubits with Photons (BQP)
O'Brien, J. L.
30/09/12 → 29/09/17
Project: Research

Cite this

@article{bc886891b9024a05921508f82ffba4c4,

title = "Quantum Walks of Correlated Photon Pairs in Two-Dimensional Waveguide Arrays",

abstract = "We demonstrate quantum walks of correlated photons in a two-dimensional network of directly laser written waveguides coupled in a {"}swiss cross{"} arrangement. The correlated detection events show high-visibility quantum interference and unique composite behavior: 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 nonclassical behavior in a nonplanar structure.",

keywords = "Photons, quantum walks, waveguides, photonics, Quantum optics",

author = "Kostas Poulios and Robert Keil and Daniel Fry and Meinecke, {Jasmin D. A.} and Matthews, {Jonathan C. F.} and Alberto Politi and Mirko Lobino and Markus Graefe and Matthias Heinrich and Stefan Nolte and Alexander Szameit and O'Brien, {Jeremy L.}",

year = "2014",

month = apr,

day = "10",

doi = "10.1103/PhysRevLett.112.143604",

language = "English",

volume = "112",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

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T1 - Quantum Walks of Correlated Photon Pairs in Two-Dimensional Waveguide Arrays

AU - Poulios, Kostas

AU - Keil, Robert

AU - Fry, Daniel

AU - Meinecke, Jasmin D. A.

AU - Matthews, Jonathan C. F.

AU - Politi, Alberto

AU - Lobino, Mirko

AU - Graefe, Markus

AU - Heinrich, Matthias

AU - Nolte, Stefan

AU - Szameit, Alexander

AU - O'Brien, Jeremy L.

PY - 2014/4/10

Y1 - 2014/4/10

N2 - We demonstrate quantum walks of correlated photons in a two-dimensional network of directly laser written waveguides coupled in a "swiss cross" arrangement. The correlated detection events show high-visibility quantum interference and unique composite behavior: 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 nonclassical behavior in a nonplanar structure.

AB - We demonstrate quantum walks of correlated photons in a two-dimensional network of directly laser written waveguides coupled in a "swiss cross" arrangement. The correlated detection events show high-visibility quantum interference and unique composite behavior: 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 nonclassical behavior in a nonplanar structure.

KW - Photons

KW - quantum walks

KW - waveguides

KW - photonics

KW - Quantum optics

U2 - 10.1103/PhysRevLett.112.143604

DO - 10.1103/PhysRevLett.112.143604

M3 - Article (Academic Journal)

C2 - 24765962

VL - 112

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 143604

M1 - 143604

ER -

Quantum Walks of Correlated Photon Pairs in Two-Dimensional Waveguide Arrays

Abstract

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Projects

Quantum Optics for Integrated Photonic Technologies

Fabricating a photonic quantum computer.

Beyond Qubits with Photons (BQP)

Cite this