Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Michael Sekania"'
Local excitations as carriers of quantum information spread out in the system in ways governed by the underlying interaction and symmetry. Understanding this phenomenon, also called quantum scrambling, is a prerequisite for employing interacting syst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d06b493cf73b52ba1bea1befbbbc5f53
Autor:
W. H. Appelt, Andreas Östlin, Dieter Vollhardt, Liviu Chioncel, Michael Sekania, I. Leonov, I. Di Marco
Publikováno v:
Phys. Rev. B
Physical Review B
Physical Review B
We compute the phonon dispersion, density of states, and the Gr\"uneisen parameters of bulk palladium in the combined density functional theory (DFT) and dynamical mean-field theory (DMFT). We find good agreement with experimental results for ground
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5fe3332bcbc410028bb8fe5fd307fc3c
https://hdl.handle.net/10995/101557
https://hdl.handle.net/10995/101557
Publikováno v:
Physical Review B. 96
Avenues of Majorana bound states (MBSs) have become one of the primary directions towards a possible realization of topological quantum computation. For a Y-junction of Kitaev quantum wires, we numerically investigate the braiding of MBSs while consi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e79428aad67c9737431346335824afad
https://doi.org/10.1103/physrevb.96.094307
https://doi.org/10.1103/physrevb.96.094307
A repulsive Hubbard model with both spin-asymmetric hopping (${t_\uparrow\neq t_\downarrow}$) and a staggered potential (of strength $\Delta$) is studied in one dimension. The model is a compound of the mass-imbalanced (${t_\uparrow\neq t_\downarrow}
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7ff00f67aa01db0027832a5782a327e
http://doc.rero.ch/record/305124/files/bae_mii.pdf
http://doc.rero.ch/record/305124/files/bae_mii.pdf
Autor:
M. M. Radonjić, Liviu Chioncel, I. Di Marco, Levente Vitos, Oscar Tjernberg, W. H. Appelt, Weiwei Sun, Michael Sekania, Andreas Östlin
Including on-site electronic interactions described by the multiorbital Hubbard model we study the correlation effects in the electronic structure of bulk palladium. We use a combined density functional and dynamical mean-field theory, LDA+DMFT, base
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::179ab674d48047093b2a8aa7c98025e4
The contribution of the valence electrons to the Compton profiles of the alkali metals is calculated using density functional theory. We show that the Compton profiles can be modeled by a $q-$Gaussian distribution, which is characterized by an anisot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7153114c7359ad5521b1d09ee686da10
Publikováno v:
Journal of Physics: Condensed Matter. 15:5895-5907
We investigate the ground-state phase diagram of the one-dimensional "ionic" Hubbard model with an alternating periodic potential at half-filling by numerical diagonalization of finite systems with the Lanczos and density matrix renormalization group
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a04f92e503f7501d53a556e13ccb3167
https://doi.org/10.1088/0953-8984/15/34/319
https://doi.org/10.1088/0953-8984/15/34/319
Publikováno v:
Physical Review B. 79
Paramagnetic solutions of the ionic Hubbard model at half-filling in dimensions $D>2$ indicate that the band and the Mott insulator phases are separated by a metallic phase. We present zero-temperature dynamical mean-field theory solutions, which inc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25116ab9d38d736d4cae00615650a777
https://doi.org/10.1103/physrevb.79.121103
https://doi.org/10.1103/physrevb.79.121103
Autor:
Georg Hager, Helmut Büttner, Holger Fehske, Gerhard Wellein, Alexander Weiße, Michael Sekania, Arno P. Kampf, Alan R. Bishop
Publikováno v:
High Performance Computing in Science and Engineering, Munich 2002 ISBN: 9783642624469
We analyze ground state and spectral properties of the one-dimensional half-filled Holstein Hubbard model with respect to the Peierls-insulator to Mott-insulator transition, exploiting Lanczos diagonalization, density matrix renormal-ization, kernel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23f1630d8c0ff6db6ea0e79b98692007
https://doi.org/10.1007/978-3-642-55526-8_27
https://doi.org/10.1007/978-3-642-55526-8_27
In order to clarify the physics of the crossover from a Peierls band insulator to a correlated Mott-Hubbard insulator, we analyze ground-state and spectral properties of the one-dimensional half-filled Holstein-Hubbard model using quasi-exact numeric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee95bc1f11637369814054d9dd8adfca
http://arxiv.org/abs/cond-mat/0203616
http://arxiv.org/abs/cond-mat/0203616