Phys. Rev. A 69, 013806 (2004) [4 pages]Spectroscopy by frequency-entangled photon pairsReceived 10 June 2003; published 14 January 2004 Quantum spectroscopy was performed using the frequency-entangled broadband photon pairs generated by spontaneous parametric down-conversion. An absorptive sample was placed in front of the idler photon detector, and the frequency of signal photons was resolved by a diffraction grating. The absorption spectrum of the sample was measured by counting the coincidences, and the result is in agreement with the one measured by a conventional spectrophotometer with a classical light source. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.69.013806
DOI:
10.1103/PhysRevA.69.013806
PACS:
42.50.Dv, 42.62.Fi, 42.65.Lm
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