Experiment on violation of Bell's inequality in a Hong-Ou-Mandel interferometer

Z. Y. Ou

M. A. Rowe, D. Kielpinski, V. Meyer +4 more

William J. Mullin, Franck Laloë

We propose using an array of potential wells as an interferometer in which the beam splitters are provided by tunneling during an appropriate time through the barrier between wells. This arrangement allows demonstration of generalized Hong-Ou-Mandel effects with multiple particles traversing one or several beam splitters. Other interferometer effects can occur, including a violation of the Bell-Clauser-Horne-Shimony-Holt form of the Bell inequality. With interactions, one sees various effects, including so-called fermionization, collective tunneling, and self-trapping.

M. A. Rowe, D. Kielpinski, V. Meyer +4 more

Trevor J. Steiner, Joshua E. Castro, Kien Le +7 more

We report an AlGaAsOI quantum photonic circuit with multiple pair sources and tunable interferometers. We demonstrate Hong-Ou-Mandel interference between two microring resonators and a tunable Bell state generator producing Ψ+ and Φ − bi-photon entangled states.

Osung Kwon, Heonoh Kim, Gu-Dong Park +1 more

제 1형의 매개하향변환에서 발생하는 광자쌍과 Hong-Ou-Mandel 간섭계를 이용하여 편광-얽힘 상태의 광자쌍을 선택적으로 발생시키고, 반파장판과 4분파장판을 조합하여 4개의 Bell 상태 $|{\Psi}^{\pm}>,|{\Phi}^{\pm}>$ 를 구현하였다. 동시계수 측정에 의한 각 상태의 평균 선명도는 77%이다. Bell states have been investigated in a Hong-Ou-Mandel interferometer using photon pairs from a type-1 SPDC. The four kinds of the Bell states, $|{\Psi}^+>,|{\Psi}^->,|{\Phi}^+>,|{\Phi}^->$ are created by placing 2 HWPs, 2 QWPs at outputs of the interferometer. They show an average visibility of 77% in the coincidence measurement.