17 citations · 113 across the 17 of their papers we have counts for
17 papers
Negative radiation pressure in Bose-Einstein condensates
Dominik Ciurla, Péter Forgács, Árpád Lukács +1
In two-component non-linear Schrödinger equations, the force exerted by incident monochromatic plane waves on an embedded dark soliton and on dark-bright-type solitons is investiga…
Iterative optimization in quantum metrology and entanglement theory using semidefinite programming
Árpád Lukács, Róbert Trényi, Tamás Vértesi +1
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 lo…
Activation of metrologically useful genuine multipartite entanglement
Róbert Trényi, Árpád Lukács, Paweł Horodecki +3
We consider quantum metrology with several copies of bipartite and multipartite quantum states. We characterize the metrological usefulness by determining how much the state outper…
Drastic effect of weak interaction near special points in semiclassical multiterminal superconducting nanostructures
Janis Erdmanis, Arpad Lukacs, Yuli Nazarov
A generic semiclassical superconducting nanostructure connected to multiple superconducting terminals hosts a quasi-continuous spectrum of Andreev states. The spectrum is sensitive…
Charge screening in the Abelian Higgs model
Péter Forgács, Árpád Lukács
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 investigat…
On non-topological solitons in Abelian gauge theories coupled to U(1)U(1) symmetric scalar fields
Péter Forgács, Árpád Lukács
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 fie…
Electroweak strings with dark scalar condensates and their (in)stability
Péter Forgács, Árpád Lukács
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, br…
Stabilisation of semilocal strings by dark scalar condensates
Péter Forgács, Árpád Lukács
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…
Vortices and magnetic bags in Abelian models with extended scalar sectors and some of their applications
Péter Forgács, Árpád Lukács
A detailed study of vortices is presented in Ginzburg-Landau (or Abelian Higgs) models with two complex scalars (order parameters) assuming a general U(1)U(1) symmetric pot…
Vortices with scalar condensates in two-component Ginzburg-Landau systems
Peter Forgacs, Árpád Lukács
In a class of two-component Ginzburg-Landau models (TCGL) with a U(1)U(1) symmetric potential, vortices with a condensate at their core may have significantly lower energie…
"Half a proton" in the Bogomol'nyi-Prasad-Sommerfield Skyrme model
Árpád Lukács
The BPS Skyrme model is a model containing an -valued scalar field, in which a Bogomol'nyi-type inequality can be satisfied by soliton solutions. In this model, the energy d…
Time-Dependent BPS Skyrmions
Theodora Ioannidou, Arpad Lukacs
An extended version of the BPS Skyrme model that admits time-dependent solutions is discussed. Initially, by introducing a power law at the original potential term of the BPS Skyrm…
Non-Abelian Vortices with a Twist
Peter Forgacs, Arpad Lukacs, Fidel A. Schaposnik
Non-Abelian flux-tube (string) solutions carrying global currents are found in the bosonic sector of 4-dimensional N=2 super-symmetric gauge theories. The specific model considered…
Baryon octet and decuplet phenomenology in a three-flavor extended linear sigma model
Peter Kovacs, Arpad Lukacs, Janos Varoczy +2
We present an effective model, which is an extension of the usual linear sigma model, that contains a low energy multiplet for every hadronic particle type. These multiplets are a…
Plane waves as tractor beams
Péter Forgács, Árpád Lukács, Tomasz Romańczukiewicz
It is shown that in a large class of systems plane waves can act as tractor beams: i.e., an incident plane wave can exert a pulling force on the scatterer. The underlying physical…
Instabilities of Twisted Strings
Peter Forgacs, Arpad Lukacs
A linear stability analysis of twisted flux-tubes (strings) in an SU(2) semilocal theory -- an Abelian-Higgs model with two charged scalar fields with a global SU(2) symmetry -- is…
Canonical quantization and black hole perturbations
Zoltan Perjes, Arpad Lukacs
We examine the possibility of a constraint-free quantization of linearized gravity, based on the Teukolsky equation for black hole perturbations. We exhibit a simple quadratic (but…