Zobrazeno 1 - 10
of 748
pro vyhledávání: '"J. Lukáš"'
Autor:
Wang, Kunkun, König, J. Lukas K., Yang, Kang, Xiao, Lei, Yi, Wei, Bergholtz, Emil J., Xue, Peng
Monopoles and braids are exotic but elusive aspects of fundamental theories of light and matter. In lattice systems, monopoles of band-structure degeneracies are subject to well-established no-go (doubling) theorems that appear to universally apply i
Externí odkaz:
http://arxiv.org/abs/2410.08191
Autor:
Chapman, Henry N., Li, Chufeng, Bajt, Saša, Butola, Mansi, Dresselhaus, J. Lukas, Egorov, Dmitry, Fleckenstein, Holger, Ivanov, Nikolay, Kiene, Antonia, Klopprogge, Bjarne, Kremling, Viviane, Middendorf, Philipp, Oberthuer, Dominik, Prasciolu, Mauro, Scheer, T. Emilie S., Sprenger, Janina, Wong, Jia Chyi, Yefanov, Oleksandr, Zakharova, Margarita, Zhang, Wenhui
Sub-angstrom spatial resolution of electron density coupled with sub-femtosecond temporal resolution is required to directly observe the dynamics of the electronic structure of a molecule after photoinitiation or some other ultrafast perturbation. Me
Externí odkaz:
http://arxiv.org/abs/2409.11127
Despite their ubiquity, systematic characterization of multifold exceptional points, $n$-fold exceptional points (EP$n$s), remains a significant unsolved problem. In this article, we characterize Abelian topology of eigenvalues for generic EP$n$s and
Externí odkaz:
http://arxiv.org/abs/2409.09153
Publikováno v:
Appl. Phys. Lett. 124, 051109 (2024)
Symmetry and non-Hermiticity play pivotal roles in photonic lattices. While symmetries such as parity-time ($\mathcal{PT}$) symmetry have attracted ample attention, more intricate crystalline symmetries have been neglected in comparison. Here, we inv
Externí odkaz:
http://arxiv.org/abs/2310.18269
Autor:
Yang, Kang, Li, Zhi, König, J. Lukas K., Rødland, Lukas, Stålhammar, Marcus, Bergholtz, Emil J.
Publikováno v:
Rep. Prog. Phys. 87 078002 (2024)
Non-Hermitian matrices are ubiquitous in the description of nature ranging from classical dissipative systems, including optical, electrical, and mechanical metamaterials, to scattering of waves and open quantum many-body systems. Seminal line-gap an
Externí odkaz:
http://arxiv.org/abs/2309.14416
The biorthogonal formalism extends conventional quantum mechanics to the non-Hermitian realm. It has, however, been pointed out that the biorthogonal inner product changes with the scaling of the eigenvectors, an ambiguity whose physical significance
Externí odkaz:
http://arxiv.org/abs/2212.06004
Publikováno v:
Phys. Rev. Research 5 (2023) L042010
We demonstrate the existence of topologically stable unpaired exceptional points (EPs), and construct simple non-Hermitian (NH) tight-binding models exemplifying such remarkable nodal phases. While fermion doubling, i.e. the necessity of compensating
Externí odkaz:
http://arxiv.org/abs/2211.05788
Publikováno v:
Plant, Soil and Environment, Vol 49, Iss 2, Pp 55-62 (2003)
Stored-product pests cause high economic losses by feeding on stored grain and endanger the public health by contamination of food by allergens. Therefore, the aim of this work was to explore whether the risk of infestation of stored grain by pests i
Externí odkaz:
https://doaj.org/article/6e1c6347ea774b8da5077051dc858bc0
Publikováno v:
In Current Opinion in Psychology December 2024 60
Publikováno v:
In Appetite 1 September 2024 200