Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Pudleiner, Petra"'
Publikováno v:
Phys. Rev. B 100, 075108 (2019)
By extending our {\it victory} implementation of the parquet approach to include non-local Coulomb interactions, we study the extended Hubbard model on the two-dimensional square lattice with a particular focus on the competition of the non-local cha
Externí odkaz:
http://arxiv.org/abs/1905.03065
Autor:
Kauch, Anna, Pudleiner, Petra, Astleithner, Katharina, Thunström, Patrik, Ribic, Tin, Held, Karsten
Publikováno v:
Phys. Rev. Lett. 124, 047401 (2020)
The interaction of light with solids gives rise to new bosonic quasiparticles, with the exciton being---undoubtedly---the most famous of these polaritons. While excitons are the generic polaritons of semiconductors, we show that for strongly correlat
Externí odkaz:
http://arxiv.org/abs/1902.09342
Publikováno v:
Phys. Rev. B 99, 125111 (2019)
We study a simple model system for the conjugated $\pi$-bonds in benzene, the Pariser-Parr-Pople (PPP) model, within the parquet approximation (PA), exemplifying the prospects of the PA for molecules. Advantages of the PA are the polynomial scaling w
Externí odkaz:
http://arxiv.org/abs/1812.04962
{\it Victory}, i.e. \underline{vi}enna \underline{c}omputational \underline{to}ol deposito\underline{ry}, is a collection of numerical tools for solving the parquet equations for the Hubbard model and similar many body problems. The parquet formalism
Externí odkaz:
http://arxiv.org/abs/1708.07457
Publikováno v:
Phys. Rev. B 93, 195134 (2016)
We compute the self-energy for the half-filled Hubbard model on a square lattice using lattice quantum Monte Carlo simulations and the dynamical vertex approximation. The self-energy is strongly momentum dependent, but it can be parametrized via the
Externí odkaz:
http://arxiv.org/abs/1602.03748
Publikováno v:
Phys. Rev. B 93, 165103 (2016)
We present an efficient implementation of the parquet formalism which respects the asymptotic structure of the vertex functions at both single- and two-particle levels in momentum- and frequency-space. We identify the two-particle reducible vertex as
Externí odkaz:
http://arxiv.org/abs/1510.03330
Autor:
Pudleiner, Petra, Mielke, Andreas
Publikováno v:
Eur. Phys. J. B 88, 207 (2015)
The Hubbard model of bosons on two dimensional lattices with a lowest flat band is discussed. In these systems there is a critical density, where the ground state is known exactly and can be represented as a charge density wave. Above this critical f
Externí odkaz:
http://arxiv.org/abs/1505.03912
Publikováno v:
In Computer Physics Communications August 2019 241:146-154
Autor:
Pudleiner, Petra
Schwerpunkt der vorliegenden Arbeit ist die Bestimmung und Analyse von Einund Zwei-Teilchen-Funktionen stark korrelierter Elektronensysteme. Gerade die Analyse der Zwei-Teilchen-Funktionen legt die Einfuhrung neuer bosonischer Quasiteilchen, den -ton
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c666e70305bdeaab90af23f186f89a19
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