Alternatives to the stochastic “noise vector” approach
Institute for Theoretical Physics, ETH, CH-8093 Zürich, Switzerland
2 CERN, Theory Division, CH-1211 Geneva, Switzerland
3 CP3-Origins & Danish Institute for Advanced Study, Department of Mathematics and Computer Science, University of Southern Denmark, 5230 Odense M, Denmark
* e-mail: firstname.lastname@example.org
Published online: 26 March 2018
Several important observables, like the quark condensate and the Taylor coefficients of the expansion of the QCD pressure with respect to the chemical potential, are based on the trace of the inverse Dirac operator and of its powers. Such traces are traditionally estimated with “noise vectors” sandwiching the operator. We explore alternative approaches based on polynomial approximations of the inverse Dirac operator.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).