A. Macridin, S. P. Doluweera, M. Jarrell, Th. Maier
Published 2004-10-04Version 1
We present a Maximum Entropy method (MEM) for obtaining dynamical spectra from Quantum Monte Carlo data which have a sign problem. By relating the sign fluctuations to the norm of the spectra, our method properly treats the correlations between the measured quantities and the sign. The method greatly improves the quality and the resolution of the spectra, enabling it to produce good spectra even for poorly conditioned data where standard MEM fails.
A general approach to the sign problem - the factorization method with multiple observables
Determination of the full statistics of quantum observables using the maximum entropy method
How universal is the relation between sign problem and phase transition
