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

Identifieur interne : 000236 ( France/Analysis ); précédent : 000235; suivant : 000237

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

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

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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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<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>
</front>
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<affiliations>
<list>
<country>
<li>Belgique</li>
<li>France</li>
</country>
<region>
<li>Franche-Comté</li>
</region>
<settlement>
<li>Belfort</li>
<li>Besançon</li>
</settlement>
<orgName>
<li>Université de Bourgogne Franche-Comté</li>
<li>Université de Franche-Comté</li>
<li>Université de technologie de Belfort-Montbéliard</li>
</orgName>
</list>
<tree>
<country name="Belgique">
<noRegion>
<name sortKey="Olislager, L" sort="Olislager, L" uniqKey="Olislager L" first="L." last="Olislager">L. Olislager</name>
</noRegion>
<name sortKey="Emplit, P" sort="Emplit, P" uniqKey="Emplit P" first="P." last="Emplit">P. Emplit</name>
<name sortKey="Massar, S" sort="Massar, S" uniqKey="Massar S" first="S." last="Massar">S. Massar</name>
<name sortKey="Woodhead, E" sort="Woodhead, E" uniqKey="Woodhead E" first="E." last="Woodhead">E. Woodhead</name>
</country>
<country name="France">
<region name="Franche-Comté">
<name sortKey="Mbodji, I" sort="Mbodji, I" uniqKey="Mbodji I" first="I." last="Mbodji">I. Mbodji</name>
</region>
<name sortKey="Cussey, J" sort="Cussey, J" uniqKey="Cussey J" first="J." last="Cussey">J. Cussey</name>
<name sortKey="Furfaro, L" sort="Furfaro, L" uniqKey="Furfaro L" first="L." last="Furfaro">L. Furfaro</name>
<name sortKey="Merolla, J M" sort="Merolla, J M" uniqKey="Merolla J" first="J.-M." last="Merolla">J.-M. Merolla</name>
<name sortKey="Phan Huy, K" sort="Phan Huy, K" uniqKey="Phan Huy K" first="K." last="Phan Huy">K. Phan Huy</name>
</country>
</tree>
</affiliations>
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