Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Marcin Abram"'
Publikováno v:
npj Computational Materials, Vol 8, Iss 1, Pp 1-12 (2022)
Abstract The identification of transitions in pattern-forming processes are critical to understand and fabricate microstructurally precise materials in many application domains. While supervised methods can be useful to identify transition regimes, t
Externí odkaz:
https://doaj.org/article/ad6404dc2ca0467089790fd0800fff13
Publikováno v:
Frontiers in Materials, Vol 9 (2023)
We introduce an efficient training framework for constructing machine learning-based emulators and demonstrate its capability by training an artificial neural network to predict the time evolution of quantum wave packets propagating through a potenti
Externí odkaz:
https://doaj.org/article/3acfac28a91e4288a9c6b8b57aa187ae
Publikováno v:
IJCAI
The problem of real-time autonomous energy management is an application area that is receiving unprecedented attention from consumers, governments, academia, and industry. This paper showcases the first application of deep reinforcement learning (DRL
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25a9f0e48942057e9bce58ee8e986f83
https://doi.org/10.24963/ijcai.2020/48
https://doi.org/10.24963/ijcai.2020/48
Publikováno v:
Journal of physics. Condensed matter : an Institute of Physics journal. 29(36)
In the first part of the paper, we study the stability of antiferromagnetic (AF), charge density wave (CDW), and superconducting (SC) states within the $t$-$J$-$U$-$V$ model of strongly correlated electrons by using the statistically consistent Gutzw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c59c0cdfc1e11c7039f819564de9253
https://pubmed.ncbi.nlm.nih.gov/28627506
https://pubmed.ncbi.nlm.nih.gov/28627506
In the present work we analyze the second order transition line that connect the tricritical point and the quantum critical ending point on the temperature--magnetic-field plane in UGe$_2$. For the microscopic modeling we employ the Anderson lattice
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74e7a5e67ec1ee55f100c6266b26f996
http://ruj.uj.edu.pl/xmlui/handle/item/18822
http://ruj.uj.edu.pl/xmlui/handle/item/18822
We provide a microscopic description of the magnetic properties of UGe$_2$ and in particular, of its both classical and quantum critical behavior. Namely, we account for all the critical points: the critical ending point (CEP) at the metamagnetic pha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c298a49b41d33bbd4d6253f23ba57a1
http://ruj.uj.edu.pl/xmlui/handle/item/6140
http://ruj.uj.edu.pl/xmlui/handle/item/6140
Autor:
Marcin Abram, A. Kapanowski
Publikováno v:
Physical Review E. 89
A system of hard spheroplatelets near an impenetrable wall is studied in the low-density Onsager approximation. Spheroplatelets have optimal shape between rods and plates, and the direct transition from the isotropic to biaxial nematic phase is prese
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b400f349109b958405f6677dd569343
https://doi.org/10.1103/physreve.89.062503
https://doi.org/10.1103/physreve.89.062503
t-t'-J-U model in mean-field approximation : coexistence of superconductivity and antiferromagnetism
Autor:
Marcin Abram
We discuss the $t$-$J$-$U$ model in the mean-field approximation. The role of spin-exchange coupling $J$ and the second nearest hopping $t'$ are examined in the context of the coexistence of superconductivity (SC) and antiferromagnetism (AF). Stabili
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e68c1e7948a191a59321aad2f43be97c
http://ruj.uj.edu.pl/xmlui/handle/item/5795
http://ruj.uj.edu.pl/xmlui/handle/item/5795
Publikováno v:
Physical Review B. 88
We discuss the coexistence of antiferromagnetism and $d$-wave superconductivity within the so-called statistically consistent Gutzwiller approximation (SGA) applied to the $t$--$J$--$U$ model. In this approach, the averages calculated in a self-consi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe36ef26ac04cb54bd335432396b7f7e
https://doi.org/10.1103/physrevb.88.094502
https://doi.org/10.1103/physrevb.88.094502
Publikováno v:
AIP Conference Proceedings.
We study the t-J-U model within the Gutzwiller approximation (GA). A coexistence of antiferromagnetism and superconductivity is found. We incorporate statistical-consistency conditions into GA and find that only a pure antiferromagnetic phase is stab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a518270dad0afa4495f93c70dd82065
https://doi.org/10.1063/1.4755825
https://doi.org/10.1063/1.4755825