Real-space cluster dynamical mean-field theory: Center-focused extrapolation on the one- and two particle-levels

Klett M, Wentzell N, Schafer T, Simkovic F, Parcollet O, Andergassen S, Hansmann P (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Physical Review Research American Physical Society

Book Volume: 2

Journal Issue: 3

DOI: 10.1103/PhysRevResearch.2.033476

Abstract

We revisit the cellular dynamical mean-field theory (CDMFT) for the single-band Hubbard model on the square lattice at half filling, reaching real-space cluster sizes of up to 9 x 9 sites. Using benchmarks against direct lattice diagrammatic Monte Carlo at high temperature, we show that the self-energy obtained from a cluster center-focused extrapolation converges faster with the cluster size than the periodization schemes previously introduced in the literature. The same benchmark also shows that the cluster spin susceptibility can be extrapolated to the exact result at large cluster size, even though its spatial extension is larger than the cluster size.

Authors with CRIS profile

Philipp Hansmann Professur für Theoretische Physik mit dem Schwerpunkt Molekulare Materialien

Involved external institutions

Collège de France FR France (FR) Eberhard Karls Universität Tübingen DE Germany (DE) Simons Foundation US United States (USA) (US)

How to cite

APA:

Klett, M., Wentzell, N., Schafer, T., Simkovic, F., Parcollet, O., Andergassen, S., & Hansmann, P. (2020). Real-space cluster dynamical mean-field theory: Center-focused extrapolation on the one- and two particle-levels. Physical Review Research, 2(3). https://doi.org/10.1103/PhysRevResearch.2.033476

MLA:

Klett, Marcel, et al. "Real-space cluster dynamical mean-field theory: Center-focused extrapolation on the one- and two particle-levels." Physical Review Research 2.3 (2020).

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