230 research outputs found
A conclusive experiment to throw more light on "light"
We describe a new realization of Ghose, Home, Agarwal experiment on wave
particle duality of light where some limitations of the former experiment,
realized by Mizobuchi and Ohtake, are overcome. Our results clearly indicate
that wave-particle complementarity must be understood between interference and
"whelcher weg" knowledge and not in a more general sense
Can experimental tests of Bell inequalities performed with pseudoscalar mesons be definitive?
We discuss if experimental tests of Bell inequalities performed with
pseudoscalar mesons (K or B) can be definitive. Our conclusion is that this is
not the case, for the efficiency loophole cannot be eliminated.Comment: submitted for publicatio
Experimental test of local realism using non-maximally entangled states
In this paper we describe a test of Bell inequalities using a non- maximally
entangled state, which represents an important step in the direction of
eliminating the detection loophole. The experiment is based on the creation of
a polarisation entangled state via the superposition, by use of an appropriate
optics, of the spontaneous fluorescence emitted by two non-linear crystals
driven by the same pumping laser.Comment: proc. of QCM&C, Capr
The Pomeron in Elastic and Deep Inelastic Scattering
We discuss some properties of the Pomeron in high energy elastic
hadron-hadron and deep inelastic lepton-hadron scattering. A number of issues
concerning the nature and the origin of the Pomeron are briefly recalled here.
The novelty in this paper resides essentially in its presentation; we strive at
discussing all these various issues in the following unifying perspective : it
is our contention that the Pomeron is one and the same in all reactions.
Various examples will be provided illustrating why we do not believe that one
should invoke additional tools to describe the data. For pedagogical
convenience, we list below the topics to be covered in the following.
-- 1. Introduction. How many Pomerons?
-- 2. The Pomeron in the -matrix theory
-- 3. The Pomeron in QCD
-- 4. The Pomeron in deep inelastic scattering
-- 5. The Pomeron structure
-- 6. (Temporary?) ConclusionsComment: 32 pages in TeX; 27 figures (available on request from
[email protected]
Of Dips, Structures and Eikonalization
We have investigated several models of Pomeron and Odderon contributions to
high energy elastic and scattering. The questions we address
concern their role in this field, the behavior of the scattering amplitude (or
of the total cross-section) at high energy, and how to fit all high energy
elastic data. The data are extremely well reproduced by our approach at all
momenta and for sufficiently high energies. The relative virtues of Born
amplitudes and of different kinds of eikonalizations are considered. An
important point in this respect is that secondary structures are predicted in
the differential cross-sections at increasing energies and these phenomena
appear quite directly related to the procedure of eikonalizing the various Born
amplitudes. We conclude that these secondary structures arise naturally within
the eikonalized procedure (although their precise localization turns out to be
model dependent). The fitting procedure naturally predicts the appearance of a
zero at small in the real part of the even amplitude as anticipated by
general theorems. We would like to stress, once again, how important it would
be to have at LHC both and options for many questions connected
to the general properties of high energy hadronic physics and for a check of
our predictions.Comment: 28 pages, LaTeX, 7 figure
A new conception experimental test of Bell inequalities using non-maximally entangled states
We report on a test of Bell inequalities using a non-maximally entangled
state, which represents an important step in the direction of eliminating the
detection loophole. The experiment is based on the creation of a polarisation
entangled state via the superposition, by use of an appropriate optics, of the
spontaneous fluorescence emitted by two non-linear crystals driven by the same
pumping laser. The alignment has profitably taken advantage from the use of an
optical amplifier scheme, where a solid state laser is injected into the
crystals together with the pumping laser. In principle a very high total
quantum efficiency can be reached using this configuration and thus the final
version of this experiment can lead to a resolution of the detection loophole,
we carefully discuss the conditions which must be satisfied for reaching this
result.Comment: to be published in Proc. of International Workshop on Optics and
Spectroscopy (Hanoi, Vietnam
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