Zobrazeno 1 - 10
of 233
pro vyhledávání: '"Honerkamp, C"'
Publikováno v:
New J. Phys. 23 063015 (2021)
The field of quantum simulations in ultra-cold atomic gases has been remarkably successful. In principle it allows for an exact treatment of a variety of highly relevant lattice models and their emergent phases of matter. But so far there is a lack i
Externí odkaz:
http://arxiv.org/abs/2102.08671
Autor:
Rohe, D., Honerkamp, C.
Publikováno v:
SciPost Phys. 9, 084 (2020)
We present a highly parallelisable scheme for treating functional Renormalisation Group equations which incorporates a quasi-particle-based feedback on the flow and provides direct access to real-frequency self-energy data. This allows to map out the
Externí odkaz:
http://arxiv.org/abs/2005.00827
Autor:
Scherer, M. M., Honerkamp, C., Rudenko, A. N., Stepanov, E. A., Lichtenstein, A. I., Katsnelson, M. I.
Publikováno v:
Phys. Rev. B 98, 241112 (2018)
We use a functional renormalization group (fRG) approach to investigate potential interaction-induced instabilities in a two-dimensional model for the Dirac nodal-line materials ZrSiS and ZrSiSe employing model parameters derived from {\it ab initio}
Externí odkaz:
http://arxiv.org/abs/1809.02962
Publikováno v:
Phys. Rev. B 98, 075143 (2018)
The parquet equations are a self-consistent set of equations for the effective two-particle vertex of an interacting many-fermion system. The application of these equations to bulk models is, however, demanding due to the complex emergent momentum an
Externí odkaz:
http://arxiv.org/abs/1802.09797
Publikováno v:
Frontiers in Physics 6, 32 (2018)
Although the functional renormalization group (fRG) is by now a well-established method for investigating correlated electron systems, it is still undergoing significant technical and conceptual improvements. In particular, the motivation to optimall
Externí odkaz:
http://arxiv.org/abs/1710.08830
Publikováno v:
Phys. Rev. B 95, 085143 (2017)
We investigate the quantum many-body instabilities for electrons on the honeycomb lattice at half-filling with extended interactions, motivated by a description of graphene and related materials. We employ a recently developed fermionic functional Re
Externí odkaz:
http://arxiv.org/abs/1606.01124
Autor:
Lichtenstein, J., de la Peña, D. Sánchez, Rohe, D., Di Napoli, E., Honerkamp, C., Maier, S. A.
We derive a novel computational scheme for functional Renormalization Group (fRG) calculations for interacting fermions on 2D lattices. The scheme is based on the exchange parametrization fRG for the two-fermion interaction, with additional insertion
Externí odkaz:
http://arxiv.org/abs/1604.06296
This document contains information supplementary to the article [1], but it is self-contained and can be read independently as a pedagogical review. In the first part, we explain our conventions for the tight-binding description of electronic states
Externí odkaz:
http://arxiv.org/abs/1511.03047
Publikováno v:
Phys. Rev. B 93, 115111 (2016)
The functional renormalization group (RG) in combination with Fermi surface patching is a well-established method for studying Fermi liquid instabilities of correlated electron systems. In this article, we further develop this method and combine it w
Externí odkaz:
http://arxiv.org/abs/1409.7087
Autor:
Lichtenstein, J., Maier, S. A., Honerkamp, C., Platt, C., Thomale, R., Andersen, O. K., Boeri, L.
Publikováno v:
Phys. Rev. B 89, 214514 (2014)
We investigate the superconducting pairing instabilities of eight-band models for the iron arsenides. Using a functional renormalization group treatment, we determine how the critical energy scale for superconductivity depends on the electronic band
Externí odkaz:
http://arxiv.org/abs/1403.5487