Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Anna Kauch"'
Autor:
Hiroshi Shinaoka, Markus Wallerberger, Yuta Murakami, Kosuke Nogaki, Rihito Sakurai, Philipp Werner, Anna Kauch
Publikováno v:
Physical Review X, Vol 13, Iss 2, p 021015 (2023)
The correlation functions of quantum systems—central objects in quantum field theories—are defined in high-dimensional space-time domains. Their numerical treatment thus suffers from the curse of dimensionality, which hinders the application of s
Externí odkaz:
https://doaj.org/article/0fff350825a5492fb8a466cf31de9944
Publikováno v:
Physical Review Research, Vol 3, Iss 3, p 033168 (2021)
The Bethe-Salpeter equation plays a crucial role in understanding the physics of correlated fermions, relating to optical excitations in solids as well as resonances in high-energy physics. Yet, it is notoriously difficult to control numerically, typ
Externí odkaz:
https://doaj.org/article/5781e68cedea43aea616b2efa87ec6da
Autor:
Thomas Schäfer, Nils Wentzell, Fedor Šimkovic, IV, Yuan-Yao He, Cornelia Hille, Marcel Klett, Christian J. Eckhardt, Behnam Arzhang, Viktor Harkov, François-Marie Le Régent, Alfred Kirsch, Yan Wang, Aaram J. Kim, Evgeny Kozik, Evgeny A. Stepanov, Anna Kauch, Sabine Andergassen, Philipp Hansmann, Daniel Rohe, Yuri M. Vilk, James P. F. LeBlanc, Shiwei Zhang, A.-M. S. Tremblay, Michel Ferrero, Olivier Parcollet, Antoine Georges
Publikováno v:
Physical Review X, Vol 11, Iss 1, p 011058 (2021)
The Hubbard model represents the fundamental model for interacting quantum systems and electronic correlations. Using the two-dimensional half-filled Hubbard model at weak coupling as a testing ground, we perform a comparative study of a comprehensiv
Externí odkaz:
https://doaj.org/article/203133f3a68c4847877129268659a912
Publikováno v:
Physical Review Research, Vol 3, Iss 1, p 013149 (2021)
The parquet formalism and Hedin's GWγ approach are unified into a single theory of vertex corrections, corresponding to an exact reformulation of the parquet equations in terms of boson exchange. The method has no drawbacks compared to previous parq
Externí odkaz:
https://doaj.org/article/ff36b87fadce40c899bf9b8e1deb84df
Autor:
Cornelia Hille, Fabian B. Kugler, Christian J. Eckhardt, Yuan-Yao He, Anna Kauch, Carsten Honerkamp, Alessandro Toschi, Sabine Andergassen
Publikováno v:
Physical Review Research, Vol 2, Iss 3, p 033372 (2020)
Using a leading algorithmic implementation of the functional renormalization group (fRG) for interacting fermions on two-dimensional lattices, we provide a detailed analysis of its quantitative reliability for the Hubbard model. In particular, we sho
Externí odkaz:
https://doaj.org/article/2caa800542fd40d19d26b6036728daab
Autor:
Hiroshi Shinaoka, Markus Wallerberger, Yuta Murakami, Kosuke Nogaki, Rihito Sakurai, Philipp Werner, Anna Kauch
Correlation functions of quantum systems -- central objects in quantum field theories -- are defined in high-dimensional space-time domains. Their numerical treatment thus suffers from the curse of dimensionality, which hinders the application of sop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df7a74911ade309e2a6502233d483451
http://arxiv.org/abs/2210.12984
http://arxiv.org/abs/2210.12984
Autor:
Winfried Auzinger, Juliette Dubois, Karsten Held, Harald Hofstätter, Tobias Jawecki, Anna Kauch, Othmar Koch, Karolina Kropielnicka, Pranav Singh, Clemens Watzenböck
Publikováno v:
Auzinger, W, Dubois, J, Held, K, Hofstätter, H, Jawecki, T, Kauch, A, Koch, O, Kropielnicka, K, Singh, P & Watzenböck, C 2022, ' Efficient Magnus-type integrators for solar energy conversion in Hubbard models ', Journal of Computational Mathematics and Data Science, vol. 2, 100018 . https://doi.org/10.1016/j.jcmds.2021.100018
Strongly interacting electrons in solids are generically described by Hubbardtype models, and the impact of solar light can be modeled by an additional time-dependence. This yields a finite dimensional system of ordinary differential equations (ODE)s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f99313d784b714b5874529607dbf4bb0
https://purehost.bath.ac.uk/ws/files/220238742/2104.02034v1.pdf
https://purehost.bath.ac.uk/ws/files/220238742/2104.02034v1.pdf
Publikováno v:
Computer Physics Communications. 241:146-154
Victory, i.e. vi enna c omputational to ol deposito ry , is a collection of numerical tools for solving the parquet equations for the Hubbard model and similar many body problems. In the current release, we focus on the single-band 2D Hubbard model,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7d4a233e8bf632a8ae3c8c0cf1eaf95
https://doi.org/10.1016/j.cpc.2019.03.008
https://doi.org/10.1016/j.cpc.2019.03.008
Autor:
Anna Kauch, Josef Kaufmann, Motoharu Kitatani, Matthias Pickem, Christian Eckhardt, Karsten Held
Publikováno v:
Physical Review B. 103
The dynamical vertex approximation and related methods represent a great leap forward in the description of nonlocal electronic correlations. It is based on a local two-particle irreducible vertex, from which the momentum-dependent self-energy is con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::891d7831e571ba8e7854e291082315c8
https://doi.org/10.1103/physrevb.103.035120
https://doi.org/10.1103/physrevb.103.035120
Antiferromagnetic or charge density wave fluctuations couple with light through the recently discovered {\pi}-ton contribution to the optical conductivity, and quite generically constitute the dominant vertex corrections in low-dimensional correlated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3091edcf9481ed1461b2576af0882dfb
http://arxiv.org/abs/2010.15797
http://arxiv.org/abs/2010.15797