Zobrazeno 1 - 10
of 166
pro vyhledávání: '"Kosmopoulos, Dimitrios"'
Autor:
Alaverdian, Mark, Bern, Zvi, Kosmopoulos, Dimitrios, Luna, Andres, Roiban, Radu, Scheopner, Trevor, Teng, Fei
We show that physical scattering observables for compact spinning objects in general relativity can depend on additional degrees of freedom in the spin tensor beyond those described by the spin vector alone. The impulse, spin kick, and leading-order
Externí odkaz:
http://arxiv.org/abs/2407.10928
We employ scattering amplitudes in curved space to model the dynamics of a light probe particle with mass $m$ orbiting in the background spacetime induced by a heavy gravitational source with mass $M$. Observables are organized as an expansion in $m/
Externí odkaz:
http://arxiv.org/abs/2308.15304
Autor:
Bern, Zvi, Kosmopoulos, Dimitrios, Luna, Andres, Roiban, Radu, Scheopner, Trevor, Teng, Fei, Vines, Justin
A previous paper~\cite{Bern:2022kto} identified a puzzle stemming from the amplitudes-based approach to spinning bodies in general relativity: additional Wilson coefficients appear compared to current worldline approaches to conservative dynamics of
Externí odkaz:
http://arxiv.org/abs/2308.14176
An interesting problem in many video-based applications is the generation of short synopses by selecting the most informative frames, a procedure which is known as video summarization. For sign language videos the benefits of using the $t$-parameteri
Externí odkaz:
http://arxiv.org/abs/2305.16801
Autor:
Blekos, Kostas, Kosmopoulos, Dimitrios
We investigate a quantum video classification method using a hybrid algorithm. A quantum-classical step performs a data reduction on the video dataset and a quantum step -- which only has access to the reduced dataset -- classifies the video to one o
Externí odkaz:
http://arxiv.org/abs/2207.06460
Theoretical data obtained from physically sensible field and string theory models suggest that gravitational Effective Field Theories (EFTs) live on islands that are tiny compared to current general bounds determined from unitarity, causality, crossi
Externí odkaz:
http://arxiv.org/abs/2205.01655
We use a previously developed scattering-amplitudes-based framework for determining two-body Hamiltonians for generic binary systems with arbitrary spin $S$. By construction this formalism bypasses difficulties with unphysical singularities or higher
Externí odkaz:
http://arxiv.org/abs/2203.06202
Long-standing data sparsity and cold-start constitute thorny and perplexing problems for the recommendation systems. Cross-domain recommendation as a domain adaptation framework has been utilized to efficiently address these challenging issues, by ex
Externí odkaz:
http://arxiv.org/abs/2112.07617
Autor:
Voskou, Andreas, Panousis, Konstantinos P., Kosmopoulos, Dimitrios, Metaxas, Dimitris N., Chatzis, Sotirios
Automating sign language translation (SLT) is a challenging real world application. Despite its societal importance, though, research progress in the field remains rather poor. Crucially, existing methods that yield viable performance necessitate the
Externí odkaz:
http://arxiv.org/abs/2109.13318
Publikováno v:
Journal of Physics A: Mathematical and Theoretical, Volume 54, Number 34, 27 August 2021
We analyze constraints from perturbative unitarity and crossing on the leading contributions of higher-dimension operators to the four-graviton amplitude in four spacetime dimensions, including constraints that follow from distinct helicity configura
Externí odkaz:
http://arxiv.org/abs/2103.12728