Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Aaram J. Kim"'
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
Recent advances in ultrafast pump-probe spectroscopy provide access to hidden phases of correlated matter, including light-induced superconducting states. The theoretical understanding of these nonequilibrium phases remains limited, particularly for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::830ed824f42b99a2b2a84d5ebf515c82
http://arxiv.org/abs/2202.10176
http://arxiv.org/abs/2202.10176
We propose a diagrammatic Monte Carlo approach for general spin-boson models, which can be regarded as a generalization of the strong-coupling expansion for fermionic impurity models. The algorithm is based on a self-consistently computed three-point
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::399a1c283caff7f847aae2ac3f5165e6
http://arxiv.org/abs/2112.15549
http://arxiv.org/abs/2112.15549
Publikováno v:
Physical review letters. 129(10)
Diagrammatic Monte Carlo -- the technique for numerically exact summation of all Feynman diagrams to high orders -- offers a unique unbiased probe of continuous phase transitions. Being formulated directly in the thermodynamic limit, the diagrammatic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d654daf41a88e03e5920b87a62052bd9
https://pubmed.ncbi.nlm.nih.gov/36112452
https://pubmed.ncbi.nlm.nih.gov/36112452
Publikováno v:
Physical Review Letters. 126
The major obstacle preventing Feynman diagrammatic expansions from accurately solving many-fermion systems in strongly correlated regimes is the series slow convergence or divergence problem. Several techniques have been proposed to address this issu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22f387dfb6ef5cb69e238cc1541c0a43
https://doi.org/10.1103/physrevlett.126.257001
https://doi.org/10.1103/physrevlett.126.257001
Autor:
Aaram J. Kim, Vincent Sacksteder
Publikováno v:
Physical Review B. 101
We study the properties of the Luttinger-Ward functional (LWF) in a simplified Hubbard-type model without time or spatial dimensions, but with $N$ identical replicas located on a single site. The simplicity of this $(0+0)d$ model permits an exact sol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cdc627a05b4a57842680b32b8e9d835b
https://doi.org/10.1103/physrevb.101.115146
https://doi.org/10.1103/physrevb.101.115146
Publikováno v:
Physical Review Letters. 124
The $2d$ Hubbard model with nearest-neighbour hopping on the square lattice and an average of one electron per site is known to undergo an extended crossover from metallic to insulating behavior driven by proliferating antiferromagnetic correlations.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97570a6c032e7afe3574cfa51e9558da
https://doi.org/10.1103/physrevlett.124.117602
https://doi.org/10.1103/physrevlett.124.117602
We present a strategy to alleviate the sign problem in continuous-time quantum Monte Carlo (CTQMC) simulations of the dynamical-mean-field-theory (DMFT) equations for the spin-orbit-coupled multiorbital Hubbard model. We first identify the combinatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12a7d368e0048f2bfe3aaa69d484b923
http://doc.rero.ch/record/328234/files/wer_asp.pdf
http://doc.rero.ch/record/328234/files/wer_asp.pdf
We study thermodynamic properties of the doped Hubbard model on the square lattice in the regime of strong charge and spin fluctuations at low temperatures near the metal-to-insulator crossover and obtain results with controlled accuracy using the di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb105f8b6554cc55d3885708bafae084
http://arxiv.org/abs/2001.09948
http://arxiv.org/abs/2001.09948
Extended Crossover from a Fermi Liquid to a Quasiantiferromagnet in the Half-Filled 2D Hubbard Model
Autor:
Evgeny Kozik, James P.F. LeBlanc, Youjin Deng, Aaram J. Kim, Fedor Simkovic, Nikolay Prokof'ev, Boris Svistunov
Publikováno v:
Simkovic, F, LeBlanc, J, Kim, A J, Deng, Y, Prokof'ev, N, Svistunov, B & Kozik, E 2020, ' Extended Crossover from a Fermi Liquid to a Quasiantiferromagnet in the Half-Filled 2D Hubbard Model ', Physical Review Letters, vol. 124, no. 1, 017003 . https://doi.org/10.1103/PhysRevLett.124.017003
The ground state of the Hubbard model with nearest-neighbor hopping on the square lattice at half filling is known to be that of an antiferromagnetic (AFM) band insulator for any on-site repulsion. At finite temperature, the absence of long-range ord
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11816ad12b5f48bbf26dae3c734f6ffc
https://doi.org/10.1103/physrevlett.124.017003
https://doi.org/10.1103/physrevlett.124.017003