Progress on stochastic analytic continuation of quantum Monte Carlo data

Understand

We report multipronged progress on the stochastic averaging approach to numerical analytic continuation of quantum Monte Carlo data.

• With the sampled spectrum parametrized with delta-functions in continuous frequency space, a calculation of the configurational entropy lends support to a simple goodness-of-fit criterion for the optimal sampling temperature.
• To further investigate entropic effects, we compare spectra sampled in continuous frequency with results of amplitudes sampled on a fixed frequency grid.
• We demonstrate equivalences between sampling and optimizing spectral functions with the maximum-entropy approach with different forms of the entropy.