# Compressing Green's function using intermediate representation between imaginary-time and real-frequency domains

arXiv: https://arxiv.org/abs/1702.03054 · HTML: https://mlsanity.com/paper/1702.03054/

## Key facts

- Cited by 1 papers in the map (data through 14 Oct 2026).
- First posted on arXiv 10 Feb 2017.

## Built on by (most cited first, 1 of 1)

- [Learned Optimizers for Analytic Continuation](https://mlsanity.com/paper/2107.13265/) (2021)

## Abstract (arXiv)

New model-independent compact representations of imaginary-time data are presented in terms of the intermediate representation (IR) of analytical continuation. This is motivated by a recent numerical finding by the authors [J. Otsuki et al., arXiv:1702.03056]. We demonstrate the efficiency of the IR through continuous-time quantum Monte Carlo calculations of an Anderson impurity model. We find that the IR yields a significantly compact form of various types of correlation functions. The present framework will provide general ways to boost the power of cutting-edge diagrammatic/quantum Monte Carlo treatments of many-body systems.