Generation and sampling of quantum states of light in a silicon chip

Stefano Paesani, Yunhong Ding, Raffaele Santagati, Levon Chakhmakhchyan, Caterina Vigliar, Karsten Rottwitt, Leif K. Oxenløwe, Jianwei Wang*, Mark G. Thompson, Anthony Laing

*Corresponding author for this work

Research output: Contribution to journalLetterResearchpeer-review

Abstract

Implementing large instances of quantum algorithms1–5 requires the processing of many quantum information carriers in a hardware platform that supports the integration of different components6. Although established semiconductor fabrication processes can integrate many photonic components7, the generation and algorithmic processing of many photons has been a bottleneck in integrated photonics. Here, we report the on-chip generation and algorithmic processing of quantum states of light with up to eight photons. Switching between different optical pumping regimes, we implement the scattershot8,9, Gaussian10 and standard boson sampling3,11–14 protocols in the same silicon chip, which integrates linear and nonlinear photonic circuitry. We use these results to benchmark a quantum algorithm for calculating molecular vibronic spectra4. Our techniques can be readily scaled for the on-chip implementation of specialized quantum algorithms with tens of photons, pointing the way to efficiency advantages over conventional computers15.

Original languageEnglish
JournalNature Physics
Volume15
Issue number9
Pages (from-to)925-929
ISSN1745-2473
DOIs
Publication statusPublished - 1 Sep 2019

Cite this

Paesani, S., Ding, Y., Santagati, R., Chakhmakhchyan, L., Vigliar, C., Rottwitt, K., ... Laing, A. (2019). Generation and sampling of quantum states of light in a silicon chip. Nature Physics, 15(9), 925-929. https://doi.org/10.1038/s41567-019-0567-8
Paesani, Stefano ; Ding, Yunhong ; Santagati, Raffaele ; Chakhmakhchyan, Levon ; Vigliar, Caterina ; Rottwitt, Karsten ; Oxenløwe, Leif K. ; Wang, Jianwei ; Thompson, Mark G. ; Laing, Anthony. / Generation and sampling of quantum states of light in a silicon chip. In: Nature Physics. 2019 ; Vol. 15, No. 9. pp. 925-929.
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abstract = "Implementing large instances of quantum algorithms1–5 requires the processing of many quantum information carriers in a hardware platform that supports the integration of different components6. Although established semiconductor fabrication processes can integrate many photonic components7, the generation and algorithmic processing of many photons has been a bottleneck in integrated photonics. Here, we report the on-chip generation and algorithmic processing of quantum states of light with up to eight photons. Switching between different optical pumping regimes, we implement the scattershot8,9, Gaussian10 and standard boson sampling3,11–14 protocols in the same silicon chip, which integrates linear and nonlinear photonic circuitry. We use these results to benchmark a quantum algorithm for calculating molecular vibronic spectra4. Our techniques can be readily scaled for the on-chip implementation of specialized quantum algorithms with tens of photons, pointing the way to efficiency advantages over conventional computers15.",
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Paesani, S, Ding, Y, Santagati, R, Chakhmakhchyan, L, Vigliar, C, Rottwitt, K, Oxenløwe, LK, Wang, J, Thompson, MG & Laing, A 2019, 'Generation and sampling of quantum states of light in a silicon chip', Nature Physics, vol. 15, no. 9, pp. 925-929. https://doi.org/10.1038/s41567-019-0567-8

Generation and sampling of quantum states of light in a silicon chip. / Paesani, Stefano; Ding, Yunhong; Santagati, Raffaele; Chakhmakhchyan, Levon; Vigliar, Caterina; Rottwitt, Karsten; Oxenløwe, Leif K.; Wang, Jianwei; Thompson, Mark G.; Laing, Anthony.

In: Nature Physics, Vol. 15, No. 9, 01.09.2019, p. 925-929.

Research output: Contribution to journalLetterResearchpeer-review

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AU - Paesani, Stefano

AU - Ding, Yunhong

AU - Santagati, Raffaele

AU - Chakhmakhchyan, Levon

AU - Vigliar, Caterina

AU - Rottwitt, Karsten

AU - Oxenløwe, Leif K.

AU - Wang, Jianwei

AU - Thompson, Mark G.

AU - Laing, Anthony

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