26 citations · 41 across the 5 of their papers we have counts for
8 papers
A simple alternative to the Breit-Wigner distribution
Francesco Giacosa, Anna Okopińska, Vanamali Shastry
First, we discuss the conditions under which the non-relativistic and relativistic types of the Breit-Wigner energy distributions are obtained. Then, upon insisting on the correct…
Entanglement properties of bound and resonant few-body states
Arkadiusz Kuroś, Anna Okopińska
Studying the physics of quantum correlations has gained new interest after it has become possible to measure entanglement entropies of few body systems in experiments with ultracol…
Exact finite reduced density matrix and von Neumann entropy for the Calogero model
Omar Osenda, Federico M. Pont, Anna Okopińska +1
The information content of continuous quantum variables systems is usually studied using a number of well known approximation methods. The approximations are made to obtain the spe…
Determination of Resonances by the Optimized Spectral Approach
Arkadiusz Kuroś, Przemysław Kościk, Anna Okopińska
The Rayleigh-Ritz procedure for determining bound-states of the Schrödinger equation relies on spectral representation of the solution as a linear combination of the basis function…
Optimized perturbation method for the propagation in the anharmonic oscillator potential
Anna Okopińska
The application of the optimized expansion for the quantum-mechanical propagation in the anharmonic potential is discussed for real and imaginary time. The first order resul…
The Finite Temperature Effective Potential for Local Composite Operators
Anna Okopińska
The method of the effective action for the composite operators and is applied to the termodynamics of the scalar quantum field with interaction. An expansi…