956 research outputs found
Exponential families, Kahler geometry and quantum mechanics
Exponential families are a particular class of statistical manifolds which
are particularly important in statistical inference, and which appear very
frequently in statistics. For example, the set of normal distributions, with
mean {\mu} and deviation {\sigma}, form a 2-dimensional exponential family.
In this paper, we show that the tangent bundle of an exponential family is
naturally a Kahler manifold. This simple but crucial observation leads to the
formalism of quantum mechanics in its geometrical form, i.e. based on the
Kahler structure of the complex projective space, but generalizes also to more
general Kahler manifolds, providing a natural geometric framework for the
description of quantum systems. Many questions related to this "statistical
Kahler geometry" are discussed, and a close connection with representation
theory is observed. Examples of physical relevance are treated in details. For
example, it is shown that the spin of a particle can be entirely understood by
means of the usual binomial distribution. This paper centers on the
mathematical foundations of quantum mechanics, and on the question of its
potential generalization through its geometrical formulation
Hamilton-Jacobi approach to Potential Functions in Information Geometry
The search for a potential function allowing to reconstruct a given
metric tensor and a given symmetric covariant tensor on a manifold
is formulated as the Hamilton-Jacobi problem associated with a
canonically defined Lagrangian on . The connection between this
problem, the geometric structure of the space of pure states of quantum
mechanics, and the theory of contrast functions of classical information
geometry is outlined.Comment: 16 pages. A discussion on the Kullback-Leibler divergence has been
added. To appear in Journal of Mathematical Physic
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