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Reconstruction of a density from its entropic moments

机译:从熵的瞬间重建密度

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摘要

We describe a general reconstruction method of the density of a physical system from a finite number of entropic moments. These statistical quantities, which are integrals of the density to a power α∈ R, may also represent some fundamental and/or experimentally accessible quantities of quantum-mechanical systems for specific values of α. We take advantage of the strategy recently used by us to solve the Hausdorff and Stieltjes entropic moment problems, where the main role is played by the inverse function of the density. In our method we first calculate such inverse function by use of an algorithm of minimization of the Fisher information measure of the density, and then we invert it. Two particular cases are discussed to illustrate the applicability of the method.
机译:我们从有限数量的熵矩中描述了物理系统密度的一般重建方法。这些统计量是密度相对于幂αεR的积分,也可以表示对于特定α值的量子力学系统的一些基本和/或实验上可访问的量。我们利用我们最近用于解决Hausdorff和Stieltjes熵矩问题的策略,这些问题的主要作用是密度的反函数。在我们的方法中,我们首先使用最小化密度的Fisher信息量度的算法来计算此类反函数,然后将其求逆。讨论了两种特殊情况,以说明该方法的适用性。

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