output
20182025
most citedBarotropic fluid compatible parametrizations of dark energy

31 citations

9 papers

cond-mat.stat-mech2025★ 1 cited

Finite time path field theory and a new type of universal quantum spin chain quench behavior

Domagoj Kuić, Alemka Knapp, Diana Šaponja-Milutinović

We discuss different quench protocols for Ising and XY spin chains in a transverse magnetic field. With a sudden local magnetic field quench as a starting point, we generalize our…

cs.CY2024★ 6 cited

Can metacognition predict your success in solving problems? An exploratory case study in programming

Bostjan Bubnic, Željko Kovačević, Tomaž Kosar

Metacognition has been recognized as an essential skill for academic success and for performance in solving problems. During learning or problem-solving, metacognitive skills facil…

quant-ph2024★ 1 cited

Finite time path field theory perturbative methods for local quantum spin chain quenches

Domagoj Kuić, Alemka Knapp, Diana Šaponja-Milutinović

We discuss local magnetic field quenches using perturbative methods of finite time path field theory (FTPFT) in the following spin chains: Ising and XY in a transverse magnetic fie…

astro-ph.CO2022★ 2 cited

Dark matter fluid constraints from galaxy rotation curves

Dalibor Perkovic, Hrvoje Stefancic

Galaxy rotation curves are considered to be convincing evidence for dark matter or some dynamically equivalent alternative mechanism. Starting only from the rotation curve data, we…

physics.ed-ph2020★ 1 cited

Theoretical and practical challenges of using three ammeter or tree voltmeter methods in teaching

V. Simovic, T. Alajbeg, J. Curkovic

The tree ammeter method and the three voltmeter method are used for measurements of power. More specifically, they are used to calculate the power factor of a specific load. Both m…

astro-ph.CO2020

Purely kinetic k-essence description of barotropic fluid models

Dalibor Perkovic, Hrvoje Stefancic

Purely kinetic k-essence models have been shown in the literature to be a field theory equivalent of barotropic fluid models of dark energy or dark matter-dark energy unification.…

gr-qc2020★ 31 cited

Barotropic fluid compatible parametrizations of dark energy

Dalibor Perkovic, Hrvoje Stefancic

Parametrizations of Equation of state parameter as a function of the scale factor or redshift are frequently used in dark energy modeling. The question investigated in this paper i…

gr-qc2019★ 14 cited

Dark sector unifications: dark matter-phantom energy, dark matter -- constant dark energy, dark matter-dark energy-dark matter

Dalibor Perkovic, Hrvoje Stefancic

The paper brings a novel approach to unification of dark matter and dark energy in terms of a cosmic fluid. A model is introduced in which the cosmic fluid speed of sound squared i…

astro-ph.CO2018★ 5 cited

Transient dark energy, cosmological constant boundary crossing and dark energy data fits

Dalibor Perkovic, Hrvoje Stefancic

The formalism of dark energy based on modeling speed of sound as a function of equation of state parameter is elaborated. A specific model which allows detailed study of cosmologic…