Analytic continuation average spectrum method for quantum liquids
Other Condensed Matter
2015-05-13 v1 Quantum Gases
Abstract
We revisit the problem of determining the real-frequency density response in quantum fluids via analytical continuation of imaginary-time quantum Monte Carlo data. We demonstrate that the average spectrum method (ASM) is capable of revealing resolved modes in the dynamic structure factor of both ortho-deuterium and liquid para-hydrogen, in agreement with experiments and quantum mode-coupling theories, while the maximum entropy approach yields only a smooth unimodal spectrum. Outstanding issues are discussed. Our work provides the first application of the ASM method in realistic off-lattice systems.
Cite
@article{arxiv.0905.4148,
title = {Analytic continuation average spectrum method for quantum liquids},
author = {David R. Reichman and Eran Rabani},
journal= {arXiv preprint arXiv:0905.4148},
year = {2015}
}
Comments
7 pages, 2 figures