132 citations
- University of CreteGR52 papers
- Foundation for Research and Technology HellasGR31 papers
- National Technical University of AthensGR16 papers
- National and Kapodistrian University of AthensGR15 papers
- University of MessinaIT10 papers
- Centre National de la Recherche ScientifiqueFR7 papers
- Polytechnic University of BariIT7 papers
- University of SussexGB7 papers
- King Abdullah University of Science and TechnologySA6 papers
- FORTH Institute of Electronic Structure and LaserGR5 papers
- Suzhou Institute of Nano-tech and Nano-bionicsCN5 papers
- Chinese Academy of SciencesCN4 papers
6 papers · 1 filter
Non-Hermitian dynamics of a two-spin system with PT symmetry
Stavros Komineas
A system of interacting spins that are under the influence of spin-polarized currents can be described using a complex functional, or a non-Hermitian (NH) Hamiltonian. We study the…
Double ring polariton condensates with polariton vortices
Evgeny Sedov, Vladimir Lukoshkin, Vladimir Kalevich +4
We study formation of superfluid currents of exciton polaritons in annular polariton condensates in a cylindrical micropillar cavity under the spatially localised nonresonant optic…
Contrary Inferences for Classical Histories within the Consistent Histories Formulation of Quantum Theory
Adamantia Zampeli, Georgios E. Pavlou, Petros Wallden
In the histories formulation of quantum theory, sets of coarse-grained histories that are consistent obey the classical probability rules. It has been argued that these sets can de…
What to Hide from Your Students: Attention-Guided Masked Image Modeling
Ioannis Kakogeorgiou, Spyros Gidaris, Bill Psomas +4
Transformers and masked language modeling are quickly being adopted and explored in computer vision as vision transformers and masked image modeling (MIM). In this work, we argue t…
A posteriori error analysis for approximations of time-fractional subdiffusion problems
Lehel Banjai, Charalambos G. Makridakis
In this paper we consider a sub-diffusion problem where the fractional time derivative is approximated either by the L1 scheme or by Convolution Quadrature. We propose new interpre…
Embedded domain Reduced Basis Models for the shallow water hyperbolic equations with the Shifted Boundary Method
Xianyi Zeng, Giovanni Stabile, Efthymios N. Karatzas +2
We consider fully discrete embedded finite element approximations for a shallow water hyperbolic problem and its reduced-order model. Our approach is based on a fixed background me…