rydstate 0.9.1

A Python package for calculating Rydberg wavefunctions.

RydState - A Rydberg State Calculator

The RydState software calculates properties of Rydberg states. We especially focus on the calculation of the radial wavefunction of Rydberg states via the Numerov method. The software can be installed via pip (requires Python >= 3.9):

pip install rydstate

To install the latest development version from github, use:

pip install git+https://github.com/pairinteraction/rydstate

How to Cite

This package relies on quantum defects provided by the community. Consider citing relevant publications for your atomic species.

Click to expand for quantum defect references

Element	Model	Identifier	References
H	SQDT	H	Schrödinger equation for hydrogen
Li	SQDT	Li	10.1017/CBO9780511524530 (1994) 10.1103/PhysRevA.34.2889 (1986)
Na	SQDT	Na	10.1088/0953-4075/30/10/009 (1997) 10.1070/QE1995v025n09ABEH000501 (1995) 10.1103/PhysRevA.45.4720 (1992)
K	SQDT	K	10.1088/0031-8949/27/4/012 (1983) 10.1016/0030-4018(81)90225-X (1981)
Rb	SQDT	Rb	10.1103/PhysRevA.83.052515 (2011) 10.1103/PhysRevA.74.054502 (2006) 10.1103/PhysRevA.74.062712 (2006) 10.1103/PhysRevA.67.052502 (2003)
Cs	SQDT	Cs	10.1103/PhysRevA.93.013424 (2016) 10.1103/PhysRevA.35.4650 (1987) 10.1103/PhysRevA.26.2733 (1982)
Sr88	SQDT, singlet sector	Sr88	10.1103/PhysRevA.108.022815 (2023) 10.17169/refubium-34581 (2022)
Sr88	SQDT, triplet sector	Sr88	10.1016/j.cpc.2020.107814 (2021)

Documentation

User Guide

• Tutorials - Examples of how to use the RydState library.

• API Reference - Documentation of classes and functions of the RydState Python library.

Using custom quantum defects

To use custom quantum defects (or quantum defects for a new species), you can simply create a subclass of rydstate.species.species_object.SpeciesObject (e.g. class CustomRubidium(SpeciesObject):) with a custom species name (e.g. name = "Custom_Rb"). Then, similarly to rydstate.species.rubidium.py you can define the quantum defects (and model potential parameters, ...) for your species. Finally, you can use the custom species by simply calling rydstate.RydbergStateAlkali("Custom_Rb", n=50, l=0, j=1/2, m=1/2) (the code will look for all subclasses of SpeciesObject until it finds one with the species name "Custom_Rb").

License

The rydstate software is licensed under LGPL v3. For more information, see LICENSE.txt.