1,504 research outputs found
Local Central Limit Theorem for Determinantal Point Processes
We prove a local central limit theorem (LCLT) for the number of points
in a region in specified by a determinantal point process
with an Hermitian kernel. The only assumption is that the variance of
tends to infinity as . This extends a previous result giving a
weaker central limit theorem (CLT) for these systems. Our result relies on the
fact that the Lee-Yang zeros of the generating function for ---
the probabilities of there being exactly points in --- all lie on the
negative real -axis. In particular, the result applies to the scaled bulk
eigenvalue distribution for the Gaussian Unitary Ensemble (GUE) and that of the
Ginibre ensemble. For the GUE we can also treat the properly scaled edge
eigenvalue distribution. Using identities between gap probabilities, the LCLT
can be extended to bulk eigenvalues of the Gaussian Symplectic Ensemble (GSE).
A LCLT is also established for the probability density function of the -th
largest eigenvalue at the soft edge, and of the spacing between -th neigbors
in the bulk.Comment: 12 pages; claims relating to LCLT for Pfaffian point processes of
version 1 withdrawn in version 2 and replaced by determinantal point
processes; improved presentation version
On the uniqueness of Gibbs states in the Pirogov-Sinai theory
We prove that, for low-temperature systems considered in the Pirogov-Sinai
theory, uniqueness in the class of translation-periodic Gibbs states implies
global uniqueness, i.e. the absence of any non-periodic Gibbs state. The
approach to this infinite volume state is exponentially fast.Comment: 12 pages, Plain TeX, to appear in Communications in Mathematical
Physic
The asymmetric Exclusion Process and Brownian Excursions
We consider the totally asymmetric exclusion process (TASEP) in one dimension
in its maximal current phase. We show, by an exact calculation, that the
non-Gaussian part of the fluctuations of density can be described in terms of
the statistical properties of a Brownian excursion. Numerical simulations
indicate that the description in terms of a Brownian excursion remains valid
for more general one dimensional driven systems in their maximal current phase.Comment: 23 pages, 1 figure, in latex, e-mail addresses: [email protected],
[email protected], [email protected]
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