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Updated: Apr 18, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Computing physical properties with quantum Monte Carlo methods with statistical fluctuations independent of system
1Laboratoire de Chimie Théorique, CNRS-UMR 7616, Université Pierre et Marie Curie Paris VI, Case 137, 4, place Jussieu 75252 PARIS Cedex 05, France.
Abstract:
We show that the recently proposed correlated sampling without reweighting procedure extends the locality (asymptotic independence of the system size) of a physical property to the statistical fluctuations of its estimator. This makes the approach potentially vastly more efficient for computing space-localized properties in large systems compared with standard correlated methods. A proof is given for a large collection of noninteracting fragments. Calculations on hydrogen chains suggest that this behavior holds not only for systems displaying short-range correlations, but also for systems with long-range correlations.
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