A Remark on Spectral Gap and Logarithmic Sobolev Inequalities for Conservative Spin Systems

نویسنده

  • PIETRO CAPUTO
چکیده

We observe that a class of conditional probability measures for unbounded spin systems with convex interactions satisses Poincar e and logarithmic Sobolev inequalities. For the corresponding conservative dynamics in a box of linear size L we show that the inverse of the spectral gap and the logarithmic Sobolev constant scale as L 2 in any dimension. 2000 MSC: 60K35

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Convex Sobolev inequalities and spectral gap Inégalités de Sobolev convexes et trou spectral

This note is devoted to the proof of convex Sobolev (or generalized Poincaré) inequalities which interpolate between spectral gap (or Poincaré) inequalities and logarithmic Sobolev inequalities. We extend to the whole family of convex Sobolev inequalities results which have recently been obtained by Cattiaux [11] and Carlen and Loss [10] for logarithmic Sobolev inequalities. Under local conditi...

متن کامل

Modified Logarithmic Sobolev Inequalities in Discrete Settings

Motivated by the rate at which the entropy of an ergodic Markov chain relative to its stationary distribution decays to zero, we study modified versions of logarithmic Sobolev inequalities in the discrete setting of finite Markov chains and graphs. These inequalities turn out to be weaker than the standard log-Sobolev inequality, but stronger than the Poincare’ (spectral gap) inequality. We sho...

متن کامل

Uniform logarithmic Sobolev inequalities for conservative spin systems with super-quadratic single-site potential

We consider a non-interacting unbounded spin system with conservation of the mean spin. We derive a uniform logarithmic Sobolev inequality (LSI) provided the single-site potential is a bounded perturbation of a strictly convex function. The scaling of the LSI constant is optimal in the system size. The argument adapts the two-scale approach of Grunewald, Otto, West-dickenberg, and Villani from ...

متن کامل

Logarithmic Sobolev and Poincaré inequalities for the circular Cauchy distribution ∗

In this paper, we consider the circular Cauchy distribution μx on the unit circle S with index 0 ≤ |x| < 1 and we study the spectral gap and the optimal logarithmic Sobolev constant for μx, denoted respectively by λ1(μx) and CLS(μx). We prove that 1 1+|x| ≤ λ1(μx) ≤ 1 while CLS(μx) behaves like log(1 + 1 1−|x| ) as |x| → 1.

متن کامل

A functional framework for the Keller-Segel system: logarithmic Hardy-Littlewood-Sobolev and related spectral gap inequalities

This note is devoted to several inequalities deduced from a special form of the logarithmic Hardy-LittlewoodSobolev, which is well adapted to the characterization of stationary solutions of a Keller-Segel system written in self-similar variables, in case of a subcritical mass. For the corresponding evolution problem, such functional inequalities play an important role for identifying the rate o...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2001