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Implementing two-photon interference in the frequency domain with electro-optic phase modulators

Identifieur interne : 000111 ( Hal/Corpus ); précédent : 000110; suivant : 000112

Implementing two-photon interference in the frequency domain with electro-optic phase modulators

Auteurs : L. Olislager ; I. Mbodji ; E. Woodhead ; J. Cussey ; L. Furfaro ; P. Emplit ; S. Massar ; K. Phan Huy ; J.-M. Merolla

Source :

RBID : Hal:hal-00707859

Abstract

Frequency-entangled photons can be readily produced using parametric down-conversion. We have recently shown how such entanglement could be manipulated and measured using electro-optic phase modulators and narrow-band frequency filters, thereby leading to two-photon interference patterns in the frequency domain. Here we introduce new theoretical and experimental developments showing that this method is potentially a competitive platform for the realization of quantum communication protocols in standard telecommunication fibres. We derive a simple theoretical expression for the coincidence probabilities and use it to optimize a Bell inequality. Furthermore, we establish an equivalence between the entangled-photon scheme and a classical interference scheme. Our measurements of two-photon interference in the frequency domain yield raw visibilities in excess of 99%. We use our high-quality setup to experimentally validate the theoretical predictions, and in particular we report a violation of the CH74 inequality by more than 18 standard deviations.


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Hal:hal-00707859

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<div type="abstract" xml:lang="en">Frequency-entangled photons can be readily produced using parametric down-conversion. We have recently shown how such entanglement could be manipulated and measured using electro-optic phase modulators and narrow-band frequency filters, thereby leading to two-photon interference patterns in the frequency domain. Here we introduce new theoretical and experimental developments showing that this method is potentially a competitive platform for the realization of quantum communication protocols in standard telecommunication fibres. We derive a simple theoretical expression for the coincidence probabilities and use it to optimize a Bell inequality. Furthermore, we establish an equivalence between the entangled-photon scheme and a classical interference scheme. Our measurements of two-photon interference in the frequency domain yield raw visibilities in excess of 99%. We use our high-quality setup to experimentally validate the theoretical predictions, and in particular we report a violation of the CH74 inequality by more than 18 standard deviations.</div>
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<surname>Phan Huy</surname>
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<idno type="halAuthorId">386919</idno>
<affiliation ref="#struct-866"></affiliation>
</author>
<author role="aut">
<persName>
<forename type="first">J.-M.</forename>
<surname>Merolla</surname>
</persName>
<idno type="halAuthorId">123022</idno>
<affiliation ref="#struct-866"></affiliation>
</author>
</analytic>
<monogr>
<idno type="localRef">Optique/Optoélectronique</idno>
<idno type="halJournalId" status="VALID">1815</idno>
<idno type="issn">1367-2630</idno>
<title level="j">New Journal of Physics</title>
<imprint>
<publisher>Institute of Physics: Open Access Journals</publisher>
<biblScope unit="volume">14</biblScope>
<biblScope unit="pp">043015</biblScope>
<date type="datePub">2012-04-17</date>
</imprint>
</monogr>
<idno type="doi">10.1088/1367-2630/14/4/043015</idno>
</biblStruct>
</sourceDesc>
<profileDesc>
<langUsage>
<language ident="en">English</language>
</langUsage>
<textClass>
<classCode scheme="halDomain" n="spi.opti">Engineering Sciences [physics]/Optics / Photonic</classCode>
<classCode scheme="halTypology" n="ART">Journal articles</classCode>
</textClass>
<abstract xml:lang="en">Frequency-entangled photons can be readily produced using parametric down-conversion. We have recently shown how such entanglement could be manipulated and measured using electro-optic phase modulators and narrow-band frequency filters, thereby leading to two-photon interference patterns in the frequency domain. Here we introduce new theoretical and experimental developments showing that this method is potentially a competitive platform for the realization of quantum communication protocols in standard telecommunication fibres. We derive a simple theoretical expression for the coincidence probabilities and use it to optimize a Bell inequality. Furthermore, we establish an equivalence between the entangled-photon scheme and a classical interference scheme. Our measurements of two-photon interference in the frequency domain yield raw visibilities in excess of 99%. We use our high-quality setup to experimentally validate the theoretical predictions, and in particular we report a violation of the CH74 inequality by more than 18 standard deviations.</abstract>
</profileDesc>
</hal>
</record>

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