120 research outputs found
Metric on a Statistical Space-Time
We introduce a concept of distance for a space-time where the notion of point
is replaced by the notion of physical states e.g. probability distributions. We
apply ideas of information theory and compute the Fisher information matrix on
such a space-time. This matrix is the metric on that manifold. We apply these
ideas to a simple model and show that the Lorentzian metric can be obtained if
we assumed that the probability distributions describing space-time
fluctuations have complex values. Such complex probability distributions appear
in non-Hermitian quantum mechanics.Comment: 7 page
Differential Entropy on Statistical Spaces
We show that the previously introduced concept of distance on statistical
spaces leads to a straightforward definition of differential entropy on these
statistical spaces. These spaces are characterized by the fact that their
points can only be localized within a certain volume and exhibit thus a feature
of fuzziness. This implies that Riemann integrability of relevant integrals is
no longer secured. Some discussion on the specialization of this formalism to
quantum states concludes the paper.Comment: 4 pages, to appear in the proceedings of the joint meeting of the 2nd
International Conference on Cybernetics and Information Technologies, Systems
and Applications (CITSA 2005) and the 11th International Conference on
Information Systems Analysis and Synthesis (ISAS 2005), to be held in
Orlando, USA, on July 14-17, 200
Design principles for secure integration of information
The purpose of this paper is to twofold. Firstly, we will show
how various conflicts which may arise in a mediated system can
be handled by means of annotated constraint logic. Secondly, we
will briefly discuss some security related issues in a mediator
architecture and possible solutions which can be implemented
within our system
Two-slit diffraction with highly charged particles: Niels Bohr's consistency argument that the electromagnetic field must be quantized
We analyze Niels Bohr's proposed two-slit interference experiment with highly
charged particles that argues that the consistency of elementary quantum
mechanics requires that the electromagnetic field must be quantized. In the
experiment a particle's path through the slits is determined by measuring the
Coulomb field that it produces at large distances; under these conditions the
interference pattern must be suppressed. The key is that as the particle's
trajectory is bent in diffraction by the slits it must radiate and the
radiation must carry away phase information. Thus the radiation field must be a
quantized dynamical degree of freedom. On the other hand, if one similarly
tries to determine the path of a massive particle through an inferometer by
measuring the Newtonian gravitational potential the particle produces, the
interference pattern would have to be finer than the Planck length and thus
undiscernable. Unlike for the electromagnetic field, Bohr's argument does not
imply that the gravitational field must be quantized.Comment: 8 pages, 4 figures. To appear in Proc. Natl. Acad. Sc
Dynamics of the Fisher Information Metric
We present a method to generate probability distributions that correspond to
metrics obeying partial differential equations generated by extremizing a
functional , where is the
Fisher metric. We postulate that this functional of the dynamical variable
is stationary with respect to small variations of these
variables. Our approach enables a dynamical approach to Fisher information
metric. It allows to impose symmetries on a statistical system in a systematic
way. This work is mainly motivated by the entropy approach to nonmonotonic
reasoning.Comment: 11 page
MECHANIZED CULTURAL REASONING AS A TOOL TO ASSESS TRUST IN VIRTUAL ENTERPRISES
International audienceThe globalized knowledge society generates virtual enterprises that are usually set up and managed on the web, and the new trend is to make the relevant technologies avail- able on intelligent portable devices. The existence of trust is a mandatory condition to make such enterprises successful. Trust has many facets ranging from very theoretical ones to fully heuristic features. One point is that trust can arise when one understands better the behavior of partners. In this paper we outline a new technology leading to the possibility to include inter-cultural issues among the factors having a strong impact on trust. This technology is called Abstraction-Based Information Technology. Its goal is to enable to design tools in articial intelligence to perform so-called cultural reasoning that ensures better trust among inter-cultural communities.We outline how Abstraction- Based Information Technology becomes feasible when working with virtual knowledge communities. An argument in favor of our approach is that it relies on a bottom-up ap- proach, particularly suitable for the web technology and for intelligent wearable devices. The solution of intercultural troubles then amounts to solve knowledge con icts among virtual knowledge communities
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