Generation of nonclassical biphoton states through cascaded quantum walks on a nonlinear chip

Alexander S. Solntsev; Frank Setzpfandt; Alex S. Clark; Che Wen Wu; Matthew J. Collins; Chunle Xiong; Andreas Schreiber; Fabian Katzschmann; Falk Eilenberger; Roland Schiek; Wolfgang Sohler; Arnan Mitchell; Christine Silberhorn; Benjamin J. Eggleton; Thomas Pertsch; Andrey A. Sukhorukov; Dragomir N. Neshev; Yuri S. Kivshar

doi:10.1103/PhysRevX.4.031007

Generation of nonclassical biphoton states through cascaded quantum walks on a nonlinear chip

Alexander S. Solntsev^*, Frank Setzpfandt, Alex S. Clark, Che Wen Wu, Matthew J. Collins, Chunle Xiong, Andreas Schreiber, Fabian Katzschmann, Falk Eilenberger, Roland Schiek, Wolfgang Sohler, Arnan Mitchell, Christine Silberhorn, Benjamin J. Eggleton, Thomas Pertsch, Andrey A. Sukhorukov, Dragomir N. Neshev, Yuri S. Kivshar

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

We demonstrate a nonlinear optical chip that generates photons with reconfigurable nonclassical spatial correlations. We employ a quadratic nonlinear waveguide array, where photon pairs are generated through spontaneous parametric down-conversion and simultaneously spread through quantum walks between the waveguides. Because of the quantum interference of these cascaded quantum walks, the emerging photons can become entangled over multiple waveguide positions. We experimentally observe highly nonclassical photon-pair correlations, confirming the high fidelity of on-chip quantum interference. Furthermore, we demonstrate biphoton-state tunability by spatial shaping and frequency tuning of the classical pump beam.

Original language	English
Article number	031007
Pages (from-to)	031007-1-031007-13
Number of pages	13
Journal	Physical Review X
Volume	4
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevX.4.031007
Publication status	Published - 2014
Externally published	Yes

Bibliographical note

Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

Optics
Quantum Physics

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10.1103/PhysRevX.4.031007Licence: CC BY

Publisher version (open access)Final published version, 2.17 MBLicence: CC BY

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Solntsev, A. S., Setzpfandt, F., Clark, A. S., Wu, C. W., Collins, M. J., Xiong, C., Schreiber, A., Katzschmann, F., Eilenberger, F., Schiek, R., Sohler, W., Mitchell, A., Silberhorn, C., Eggleton, B. J., Pertsch, T., Sukhorukov, A. A., Neshev, D. N., & Kivshar, Y. S. (2014). Generation of nonclassical biphoton states through cascaded quantum walks on a nonlinear chip. Physical Review X, 4(3), 031007-1-031007-13. Article 031007. https://doi.org/10.1103/PhysRevX.4.031007

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title = "Generation of nonclassical biphoton states through cascaded quantum walks on a nonlinear chip",

abstract = "We demonstrate a nonlinear optical chip that generates photons with reconfigurable nonclassical spatial correlations. We employ a quadratic nonlinear waveguide array, where photon pairs are generated through spontaneous parametric down-conversion and simultaneously spread through quantum walks between the waveguides. Because of the quantum interference of these cascaded quantum walks, the emerging photons can become entangled over multiple waveguide positions. We experimentally observe highly nonclassical photon-pair correlations, confirming the high fidelity of on-chip quantum interference. Furthermore, we demonstrate biphoton-state tunability by spatial shaping and frequency tuning of the classical pump beam.",

keywords = "Optics, Quantum Physics",

author = "Solntsev, {Alexander S.} and Frank Setzpfandt and Clark, {Alex S.} and Wu, {Che Wen} and Collins, {Matthew J.} and Chunle Xiong and Andreas Schreiber and Fabian Katzschmann and Falk Eilenberger and Roland Schiek and Wolfgang Sohler and Arnan Mitchell and Christine Silberhorn and Eggleton, {Benjamin J.} and Thomas Pertsch and Sukhorukov, {Andrey A.} and Neshev, {Dragomir N.} and Kivshar, {Yuri S.}",

note = "Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",

year = "2014",

doi = "10.1103/PhysRevX.4.031007",

language = "English",

volume = "4",

pages = "031007--1--031007--13",

journal = "Physical Review X",

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Solntsev, AS, Setzpfandt, F, Clark, AS, Wu, CW, Collins, MJ, Xiong, C, Schreiber, A, Katzschmann, F, Eilenberger, F, Schiek, R, Sohler, W, Mitchell, A, Silberhorn, C, Eggleton, BJ, Pertsch, T, Sukhorukov, AA, Neshev, DN & Kivshar, YS 2014, 'Generation of nonclassical biphoton states through cascaded quantum walks on a nonlinear chip', Physical Review X, vol. 4, no. 3, 031007, pp. 031007-1-031007-13. https://doi.org/10.1103/PhysRevX.4.031007

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T1 - Generation of nonclassical biphoton states through cascaded quantum walks on a nonlinear chip

AU - Solntsev, Alexander S.

AU - Setzpfandt, Frank

AU - Clark, Alex S.

AU - Wu, Che Wen

AU - Collins, Matthew J.

AU - Xiong, Chunle

AU - Schreiber, Andreas

AU - Katzschmann, Fabian

AU - Eilenberger, Falk

AU - Schiek, Roland

AU - Sohler, Wolfgang

AU - Mitchell, Arnan

AU - Silberhorn, Christine

AU - Eggleton, Benjamin J.

AU - Pertsch, Thomas

AU - Sukhorukov, Andrey A.

AU - Neshev, Dragomir N.

AU - Kivshar, Yuri S.

N1 - Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2014

Y1 - 2014

N2 - We demonstrate a nonlinear optical chip that generates photons with reconfigurable nonclassical spatial correlations. We employ a quadratic nonlinear waveguide array, where photon pairs are generated through spontaneous parametric down-conversion and simultaneously spread through quantum walks between the waveguides. Because of the quantum interference of these cascaded quantum walks, the emerging photons can become entangled over multiple waveguide positions. We experimentally observe highly nonclassical photon-pair correlations, confirming the high fidelity of on-chip quantum interference. Furthermore, we demonstrate biphoton-state tunability by spatial shaping and frequency tuning of the classical pump beam.

AB - We demonstrate a nonlinear optical chip that generates photons with reconfigurable nonclassical spatial correlations. We employ a quadratic nonlinear waveguide array, where photon pairs are generated through spontaneous parametric down-conversion and simultaneously spread through quantum walks between the waveguides. Because of the quantum interference of these cascaded quantum walks, the emerging photons can become entangled over multiple waveguide positions. We experimentally observe highly nonclassical photon-pair correlations, confirming the high fidelity of on-chip quantum interference. Furthermore, we demonstrate biphoton-state tunability by spatial shaping and frequency tuning of the classical pump beam.

KW - Optics

KW - Quantum Physics

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VL - 4

SP - 031007-1-031007-13

JO - Physical Review X

JF - Physical Review X

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M1 - 031007

ER -

Generation of nonclassical biphoton states through cascaded quantum walks on a nonlinear chip

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