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References & Citations

Quantum Physics

Title:Quantum Imaging with Undetected Photons

Abstract: Indistinguishable quantum states interfere, but the mere possibility of obtaining information that could distinguish between overlapping states inhibits quantum interference. We present a novel 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. If a pair is created in the first crystal, the undetected photon passes the sample to be imaged, and its mode is made identical to that of an undetected photon created in the second crystal. Because of the pair correlation, the phase and amplitude information imprinted on the undetected photon is also carried by its brother photon, called the signal. Interference of the two signal beams, one arising from each crystal, then reveals the image. The photons passing through the object are never detected, and the signal photons that are detected never interact with the object. We demonstrate the power of the method by exhibiting images obtained with signal photons that either cannot pass through the object because they would be absorbed, or where the phase information would not lead to a pattern. The probe wavelength could be even one for which no good sources and/or detectors exist.
Subjects: Quantum Physics (quant-ph); Optics (physics.optics)
Cite as: arXiv:1401.4318 [quant-ph]
  (or arXiv:1401.4318v1 [quant-ph] for this version)

Submission history

From: Gabriela Barrreto Lemos [view email]
[v1] Fri, 17 Jan 2014 12:19:16 UTC (949 KB)
[v2] Mon, 27 Jan 2014 18:21:46 UTC (1,117 KB)