Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Markus Wallerberger"'
Autor:
Markus Wallerberger, Samuel Badr, Shintaro Hoshino, Sebastian Huber, Fumiya Kakizawa, Takashi Koretsune, Yuki Nagai, Kosuke Nogaki, Takuya Nomoto, Hitoshi Mori, Junya Otsuki, Soshun Ozaki, Thomas Plaikner, Rihito Sakurai, Constanze Vogel, Niklas Witt, Kazuyoshi Yoshimi, Hiroshi Shinaoka
Publikováno v:
SoftwareX, Vol 21, Iss , Pp 101266- (2023)
We introduce sparse-ir, a collection of libraries to efficiently handle imaginary-time propagators, a central object in finite-temperature quantum many-body calculations. We leverage two concepts: firstly, the intermediate representation (IR), an opt
Externí odkaz:
https://doaj.org/article/709ecf43622542c286f116b897d562fa
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
Autor:
Markus Wallerberger, Karsten Held
Publikováno v:
Physical Review Research, Vol 4, Iss 3, p 033238 (2022)
Ranking bit patterns—finding the index of a given pattern in an ordered sequence—is a major bottleneck in scaling up numerical quantum many-body calculations, as fermionic and hard-core bosonic states translate naturally to bit patterns. Traditio
Externí odkaz:
https://doaj.org/article/024a9ea74d314c9ebf825c49f0eed7a3
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
Publikováno v:
Physical Review Research, Vol 2, Iss 3, p 033211 (2020)
We present a diagrammatic Monte Carlo method for quantum impurity problems with general interactions and general hybridization functions. Our method uses a recursive determinant scheme to sample diagrams for the scattering amplitude. Unlike in other
Externí odkaz:
https://doaj.org/article/3e9ee1ca46994478a2de40426a542360
Publikováno v:
SciPost Physics, Vol 8, Iss 1, p 012 (2020)
Many-body calculations at the two-particle level require a compact representation of two-particle Green's functions. In this paper, we introduce a sparse sampling scheme in the Matsubara frequency domain as well as a tensor network representation
Externí odkaz:
https://doaj.org/article/892534eb8b524df4bd7acf7fa7d35ab3
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:
Markus Wallerberger, Samuel Badr, Shintaro Hoshino, Sebastian Huber, Fumiya Kakizawa, Takashi Koretsune, Yuki Nagai, Kosuke Nogaki, Takuya Nomoto, Hitoshi Mori, Junya Otsuki, Soshun Ozaki, Thomas Plaikner, Rihito Sakurai, Constanze Vogel, Niklas Witt, Kazuyoshi Yoshimi, Hiroshi Shinaoka
We introduce sparse-ir, a collection of libraries to efficiently handle imaginary-time propagators, a central object in finite-temperature quantum many-body calculations. We leverage two concepts: firstly, the intermediate representation (IR), an opt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0dd05f45db8f01cf88334c589eaaf7a3
http://arxiv.org/abs/2206.11762
http://arxiv.org/abs/2206.11762
Autor:
Hiroshi Shinaoka, Naoya Chikano, Emanuel Gull, Jia Li, Takuya Nomoto, Junya Otsuki, Markus Wallerberger, Tianchun Wang, Kazuyoshi Yoshimi
This lecture note reviews recently proposed sparse-modeling approaches for efficient ab initio many-body calculations based on the data compression of Green's functions. The sparse-modeling techniques are based on a compact orthogonal basis, an inter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35d00f68172202a57113d0fd2ccd8d84
We employ the jackknife algorithm to analyze the propagation of the statistical quantum Monte Carlo error through the Bethe--Salpeter equation. This allows us to estimate the error of dynamical mean-field theory calculations of the susceptibility and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd84a5c682541bc08c33c712bf9932b8
http://arxiv.org/abs/2005.04899
http://arxiv.org/abs/2005.04899