Spectroscopy by frequency-entangled photon pairs
Abstract
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.
- Publication:
-
Physical Review A
- Pub Date:
- January 2004
- DOI:
- 10.1103/PhysRevA.69.013806
- arXiv:
- arXiv:quant-ph/0306154
- Bibcode:
- 2004PhRvA..69a3806Y
- Keywords:
-
- 42.50.Dv;
- 42.62.Fi;
- 42.65.Lm;
- Nonclassical states of the electromagnetic field including entangled photon states;
- quantum state engineering and measurements;
- Laser spectroscopy;
- Parametric down conversion and production of entangled photons;
- Quantum Physics
- E-Print:
- 11 pages, 5 figures, to be published in Phys. Lett. A