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pro vyhledávání: '"DIAS, RICARDO"'
In flat-band systems with non-orthogonal compact localized states (CLSs), onsite perturbations couple neighboring CLSs and generate exponentially-decaying impurity states, whose degree of localization depends on lattice parameters. In this work, a di
Externí odkaz:
http://arxiv.org/abs/2407.15789
Publikováno v:
Commun Phys 7, 387 (2024)
Flat band (FB) systems, featuring dispersionless energy bands, have garnered significant interest due to their compact localized states (CLSs). However, a detailed account on how local impurities affect the physical properties of overlapping CLSs is
Externí odkaz:
http://arxiv.org/abs/2407.14405
Publikováno v:
Nanophotonics 13(1), 51-61 (2024)
Square-root topology is one of the newest additions to the ever expanding field of topological insulators (TIs). It characterizes systems that relate to their parent TI through the squaring of their Hamiltonians. Extensions to $2^n$-root topology, wh
Externí odkaz:
http://arxiv.org/abs/2307.16855
We demonstrate that a complete class of flat-band lattices with underlying commutative local symmetries exhibit a locally fragmented Hilbert space. The equitable partition theorem ensures distinct parities for the compact localized states (CLSs) pres
Externí odkaz:
http://arxiv.org/abs/2306.15660
We study the topological properties of interacting and non-interacting bosons loaded in the orbital angular momentum states $l=1$ in a lattice of rings with alternating distances. At the single-particle level, the two circulation states within each s
Externí odkaz:
http://arxiv.org/abs/2305.07008
Autor:
Dias, Ricardo1 (AUTHOR) eu-fora@efsa.europa.eu, Mottola, Ilaria2 (AUTHOR), Bellomo, Claudia3 (AUTHOR), da Silva, Sara1 (AUTHOR), Milheiro, Daniela1 (AUTHOR), Barone, Maria Vittoria3 (AUTHOR), Martinek, Petr4 (AUTHOR), de Freitas, Victor1 (AUTHOR), Gianfrani, Carmen2 (AUTHOR)
Publikováno v:
EFSA Journal. Dec2024 Supplement 1, Vol. 22, p1-9. 9p.
We study Bose-Hubbard models in a family of diamond necklace lattices with $n$ central sites. The single-particle spectrum of these models presents compact localized states (CLSs) that occupy the up and down sites of each diamond. By performing an ap
Externí odkaz:
http://arxiv.org/abs/2210.02429
We study a system of a few ultracold bosons loaded into the states with orbital angular momentum $l=1$ of a one-dimensional staggered lattice of rings. Local eigenstates with winding numbers $+l$ and $-l$ form a Creutz ladder with a real dimension an
Externí odkaz:
http://arxiv.org/abs/2209.09183
Autor:
Duarte, Bernardo, Cruz-Silva, Ana, Feijão, Eduardo, Pereira, Marcelo, Nunes, Mónica, Figueiredo, Andreia, Matos, Ana Rita, Dias, Ricardo, Fonseca, Vanessa, Gameiro, Carla, Cabrita, Maria Teresa
Publikováno v:
In Environmental and Sustainability Indicators December 2024 24
Autor:
Correia, Jéssica, Gudiña, Eduardo J., Janek, Tomasz, Dias, Ricardo, de Freitas, Victor, Teixeira, José A.
Publikováno v:
In Biochemical Engineering Journal November 2024 211