Transfer of angular spectrum and image formation in spontaneous parametric down-conversion

Monken, C. H.; Ribeiro, P. H. Souto; Pádua, S.

doi:10.1103/physreva.57.3123

Cited by 334 publications

(324 citation statements)

References 18 publications

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“…In the first experiment, a cardboard cut-out is placed into the path D1-D2. Due to transverse spatial correlation between the signal and idler photons 16 intensity pictures exhibits the difference of constructive and destructive interference, and the background cancels out.…”

Section: Resultsmentioning

confidence: 99%

Quantum imaging with undetected photons

Lemos

Borish

Cole

et al. 2014

Nature

619

474

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SUMMARYIndistinguishable quantum states interfere, but the mere possibility of obtaining information that could distinguish between overlapping states inhibits quantum interference. Quantum interference imaging can outperform classical imaging or even have entirely new features.Here, we introduce and experimentally demonstrate a quantum imaging concept that relies on the indistinguishability of the possible sources of a photon that remains undetected. Our experiment uses pair creation in two separate down-conversion crystals. While the photons passing through the object are never detected, we obtain images exclusively with the sister photons that do not interact with the object. Therefore the object to be imaged can be either opaque or invisible to the detected photons. Moreover, our technique allows the probe wavelength to be chosen in a range for which suitable sources and/or detectors are unavailable. Our experiment is a prototype in quantum information where knowledge can be extracted by and about a photon that is never detected.2

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Section: Resultsmentioning

confidence: 99%

Quantum imaging with undetected photons

Lemos

Borish

Cole

et al. 2014

Nature

619

474

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“…For a thin nonlinear crystal centered at the origin and pumped along the z direction, the state generated by SPDC (Spontaneous Parametric Down-conversion) in the monochromatic and paraxial approximations can be represented by [6] …”

Section: Stimulated Intensity Profilementioning

confidence: 99%

“…This is analogous to the image transfer to the fourth order correlation function demonstrated in ref. [6], but now the image is transferred to the second order correlation function (intensity).…”

Section: Stimulated Intensity Profilementioning

confidence: 99%

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Image and coherence transfer in the stimulated down-conversion process

1999

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The intensity transverse profile of the light produced in the process of stimulated down-conversion is derived. A quantum-mechanical treatment is used. We show that the angular spectrum of the pump laser can be transferred to the stimulated down-converted beam, so that images can also be transferred from the pump to the down-converted beam. We also show that the transfer can occur from the stimulating beam to the down-converted one. Finally, we study the process of diffraction through an arbitrarily shaped screen. For the special case of a double-slit, the interference pattern is explicitly obtained. The visibility for the spontaneous emitted light is in accordance with the van Cittert -Zernike theorem for incoherent light, while the visibility for the stimulated emitted light is unity. The overall visibility is in accordance with previous experimental results. 42.50.Ar, 42.25.Kb

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“…The angular spectrum is also transferred from the pump beam to both down-converted beams, as examined, e.g., in Ref. [6]. The coherence times of the down-converted photons were measured first in the 80's by Hong, Ou and Mandel (HOM) [7].…”

Section: Introductionmentioning

confidence: 99%

Experimental verification of energy correlations in entangled photon pairs

et al. 2003

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Properties of entangled photon pairs generated in spontaneous parametric down-conversion are investigated in interference experiments. Strong energy correlations are demonstrated in a direct way. If a signal photon is detected behind a narrow spectral filter, then interference appears in the Mach-Zehnder interferometer placed in the route of the idler photon, even if the path difference in the interferometer exceeds the coherence length of the light. Narrow time correlations of the detection instants are demonstrated for the same photon-pair source using the Hong-Ou-Mandel interferometer. Both these two effects may be exhibited only by an entangled state.

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Transfer of angular spectrum and image formation in spontaneous parametric down-conversion

Cited by 334 publications

References 18 publications

Quantum imaging with undetected photons

Quantum imaging with undetected photons

Image and coherence transfer in the stimulated down-conversion process

Experimental verification of energy correlations in entangled photon pairs

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