From: scerir (scerir@libero.it)
Date: Sun May 12 2002 - 01:40:48 MDT
Hal Finney :
> His article at http://www.flownet.com/gat/QM.pdf describes a similar
> paradox. We have EPR entangled photons allowed to separate, and each one
> passes through a double-slit experiment. In a double-slit experiment,
> we see an interference pattern on the screen if we can't tell which
> slit the photon went through. The interference pattern vanishes if we
> have some way of distinguishing the paths through the two slits. <snip>
There is something also in the arxiv.
http://arxiv.org/abs/quant-ph/9501016
Quantum Nonlocality in Two-Photon Experiments at Berkeley
- Raymond Y. Chiao, Paul G. Kwiat, Aephraim M. Steinberg
We review some of our experiments performed over the past few years on
two-photon interference. These include a test of Bell's inequalities, a
study of the complementarity principle, an application of EPR
correlations for dispersion-free time-measurements, and an experiment to
demonstrate the superluminal nature of the tunneling process. The
nonlocal character of the quantum world is brought out clearly by these
experiments. As we explain, however, quantum nonlocality is not
inconsistent with Einstein causality.
http://arxiv.org/abs/quant-ph/9707042
Experimental demonstration of quantum correlations over more than 10 km
- W. Tittel, J. Brendel, B. Gisin, T. Herzog, H. Zbinden, N. Gisin
Energy and time entangled photons at a wavelength of 1310 nm are
produced by parametric downconversion in a KNbO3 crystal and are sent
into all-fiber interferometers using a telecom fiber network. The two
interferometers of this Franson-type test of the Bell-inequality are
located 10.9 km apart from one another. Two-photon fringe visibilities
of up to 81.6 % are obtained. These strong nonlocal correlations support
the nonlocal predictions of quantum mechanics and provide evidence that
entanglement between photons can be maintained over long distances.
http://arxiv.org/abs/quant-ph/9707030
Ghost interference and diffraction based on the beam splitter
- Lu-Ming Duan, Guang-Can Guo
A simple scheme is proposed for observing the ghost interference and
diffraction. The signal and the idler beams are produced by a beam
splitter with the incident light being in a thermal state. A slit is
inserted into the signal beam. We derive rigorously that
interference-diffraction patterns can be observed in the first-order
correlation by scanning the probe in the idler beam.
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