Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Lukács, Árpad"'
Publikováno v:
Phys. Rev. E 109, 014228 (2024)
In two-component non-linear Schr\"odinger equations, the force exerted by incident monochromatic plane waves on an embedded dark soliton and on dark-bright-type solitons is investigated, both perturbatively and by numerical simulations. When the inco
Externí odkaz:
http://arxiv.org/abs/2307.02925
We discuss efficient methods to optimize the metrological performance over local Hamiltonians in a bipartite quantum system. For a given quantum state, our methods find the best local Hamiltonian for which the state outperforms separable states the m
Externí odkaz:
http://arxiv.org/abs/2206.02820
Autor:
Trényi, Róbert, Lukács, Árpád, Horodecki, Paweł, Horodecki, Ryszard, Vértesi, Tamás, Tóth, Géza
Publikováno v:
New J. Phys. 26 023034 (2024)
We consider quantum metrology with several copies of bipartite and multipartite quantum states. We characterize the metrological usefulness by determining how much the state outperforms separable states. We identify a large class of entangled states
Externí odkaz:
http://arxiv.org/abs/2203.05538
A generic semiclassical superconducting nanostructure connected to multiple superconducting terminals hosts a quasi-continuous spectrum of Andreev states. The spectrum is sensitive to the superconducting phases of the terminals. It can be either gapp
Externí odkaz:
http://arxiv.org/abs/2107.14105
Autor:
Forgács, Péter, Lukács, Árpád
Publikováno v:
Eur. Phys. J. C81, 243 (2021)
In the Abelian Higgs model electric (and magnetic) fields of external charges (and currents) are screened by the scalar field. In this contribution, complementing recent investigations of Ishihara and Ogawa, we present a detailed investigation of cha
Externí odkaz:
http://arxiv.org/abs/2011.01634
Autor:
Forgács, Péter, Lukács, Árpád
Publikováno v:
Phys. Rev. D 102, 076017 (2020)
In a series of recent works Ishihara and Ogawa have investigated non-topological solitons (Q-balls) in a spontaneously broken Abelian gauge theory coupled to two complex scalar fields. The present paper extends their investigations to the most genera
Externí odkaz:
http://arxiv.org/abs/2008.09844
Autor:
Forgács, Péter, Lukács, Árpád
Publikováno v:
Phys. Rev. D 102, 023009 (2020)
The stability of "visible" electroweak-type cosmic strings is investigated in an extension of the Standard Model (SM) by a minimal dark sector, consisting of a U(1) gauge field, broken spontaneously by a scalar. The "visible" and dark sectors are cou
Externí odkaz:
http://arxiv.org/abs/1909.07447
Publikováno v:
Phys. Rev. B 98, 241105 (2018)
A variety of quantum systems exhibits Weyl points in their spectra where two bands cross in a point of three-dimensional parameters space with conical dispersion in the vicinity of the point. We consider theoretically the soft constraint regime where
Externí odkaz:
http://arxiv.org/abs/1805.03678
Autor:
Piette, Bernard1 (AUTHOR) arpad.l.lukacs@durham.ac.uk, Lukács, Árpad1 (AUTHOR)
Publikováno v:
Symmetry (20738994). Sep2023, Vol. 15 Issue 9, p1804. 29p.
Autor:
Forgács, Péter, Lukács, Árpád
Publikováno v:
Phys. Rev. D 95, 035003 (2017)
Semilocal and electroweak strings are well-known to be unstable against unwinding by the condensation of the second Higgs component in their cores. A large class of current models of dark matter contains dark scalar fields coupled to the Higgs sector
Externí odkaz:
http://arxiv.org/abs/1612.03151