Review of recent experimental progress in foundations of quantum mechanics and quantum information achieved in parametric downconversion experiments at IENGF |
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Authors: | M. Genovese G. Brida E. Cagliero M. Gramegna E. Predazzi |
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Affiliation: | (1) Istituto Elettrotecnico Nazionale Galileo Ferraris (IENGF), I-10135 Torino, Italy;(2) Dipartimento di Fisica Teorica, Universitá di Torino, and INFN, I-10125 Torino, Italy |
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Abstract: | We review some recent experimental progress concerning foundations of quantum mechanics and quantum information obtained in the Carlo Novero Quantum Optics Laboratory at IENGF. After a short presentation of our polarization-entangled photon source (based on precise superposition of two type I PDC emissions) and of the results obtained with it, we describe in more detail an innovative double slit experiment where two degenerate photons produced by PDC are each sent to a specific slit. Beyond representing an interesting example of the relation between the visibility of interference and welcher Weg knowledge, this configuration has been suggested for testing de Broglie-Bohm theory (dBB) against standard quantum mechanics (SQM). Our results perfectly fit SQM results but disagree with dBB predictions. Then, we discuss a recent experiment addressed at clarifying the issue of which wave-particle observables are really to be considered when discussing wave-particle duality. This experiments realizes the theoretical proposal of Agarwal et al., overcoming the limitations of a previous experiment. Finally, we hint at the realization of a high-intensity high-spectral-selectivity PDC source to be used for quantum information studies. |
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