aa-morgan/rydberg_helium_stark

Calculate the Stark effect in Rydberg helium using the Numerov method

Deprecated: In favour of www.github.com/aa-morgan/helium-stark-zeeman

Rydberg_helium_Stark

Tools for calculating the Stark effect in Rydberg helium using the Numerov method.

About

The code is based on:

Stark structure of the Rydberg states of alkali-metal atoms
    M. L. Zimmerman et al. Phys. Rev. A, 20 2251 (1979)
    http://dx.doi.org/10.1103/PhysRevA.20.2251

Rydberg atom diamagnetism
    M. M. KASH, PhD thesis, Massachusetts Institute of Technology.
    Dept. of Physics. (1988)
    http://hdl.handle.net/1721.1/14367

Cold atoms and molecules by Zeeman deceleration and Rydberg-
Stark deceleration
    S. D. Hogan, Habilitationsschrift, ETH Zurich (2012)
    http://dx.doi.org/10.3929/ethz-a-007577485

And uses quantum defects from:

High Precision Theory of Atomic Helium
G. W. F. Drake
Physica Scripta, Vol. T83 83-92 (1999)

The code hasn't been tested extensively. But it seems to give pretty accurate results for high-$n$ states ($n > 10$) and notably wrong ones for low-$n$.

Install

Written using Python 3.6.0 :: Anaconda (64-bit).

Required packages are scipy, numpy, matplotlib, numba, and tqdm.

If you are using anaconda most of these are probably already installed, with the exceptions of numba and tqdm.

numba uses just-in-time compilation to significantly speed up python code.

conda install numba

tqdm provides a simple and efficient progress bar.

pip install tqdm

To install this project as a package that can be imported into python as starkhelium,

git clone https://github.com/ad3ller/Rydberg_helium_Stark
cd ./Rydberg_helium_Stark
python setup.py develop

Usage

See notebooks.