7 papers
An Algorithm for Automated Extraction of Resonance Parameters from the Stabilization Method
Johanna Langner, Anjan Sadhukhan, Jayanta K. Saha +1
The application of the stabilization method [A.~U.\ Hazi and H.~S.\ Taylor, Phys.~Rev.~A {\bf 1}, 1109 (1970)]) to extract accurate energy and lifetimes of resonance states is chal…
Elimination of angular dependency in the quantum three-body problem made easy
Anjan Sadhukhan, Grzegorz Pestka, Rafał Podeszwa +1
We present a systematic account of the separation of the angular degrees of freedom from the nonrelativistic Schrödinger equation for a three-body quantum system with arbitrary mas…
SpectraMatcher: A Python Program for Interactive Analysis and Peak Assignment of Vibronic Spectra
Johanna Langner, Isabelle Weber, Henryk A. Witek +1
SpectraMatcher is a cross-platform desktop application for interactive comparison of experimental and computed vibronic spectra, designed to assist in the recognition and assignmen…
ZZPolyCalc: An open-source code with fragment caching for determination of Zhang-Zhang polynomials of carbon nanostructures
Rafał Podeszwa, Henryk A. Witek, Chien-Pin Chou
Determination of topological invariants of graphene flakes, nanotubes, and fullerenes constitutes a challenging task due to its time-intensive nature and exponential scaling. The i…
ZZ Polynomials of Regular -tier Benzenoid Strips as Extended Strict Order Polynomials of Associated Posets -- Part 1. Proof of Equivalence
Johanna Langner, Henryk A. Witek
In Part 1 of the current series of papers, we demonstrate the equivalence between the Zhang-Zhang polynomial of a Kekuléan regular -tier strip $\bo…
Zhang-Zhang Polynomials of Ribbons
Bing-Hau He, Chien-Pin Chou, Johanna Langner +1
We report a closed-form formula for the Zhang-Zhang polynomial (aka ZZ polynomial or Clar covering polynomial) of an important class of elementary pericondensed benzenoids $Rb\left…
In how many distinct ways can flocks be formed? A problem in sheep combinatorics
Johanna Langner, Henryk A. Witek
In this short paper, we extend the concept of the strict order polynomial , which enumerates the number of strict order-preserving maps $ϕ:P\rightarrow\boldsymbol…