jitr 0.3

Calculable R-matrix solver for quantum scattering using just-in-time compilation for performance.

Just-In-Time R-matrix (JITR)

Quick start

 pip install jitr

Description

Solves the radial Bloch-Shrödinger equation in the continuum using the calculable R-Matrix method on a Lagrange-Legendre mesh, using just-in-time (JIT) compilation from numba. The theory generally follows:

• Descouvemont, P. (2016). An R-matrix package for coupled-channel problems in nuclear physics. Computer physics communications, 200, 199-219,
• Baye, D. (2015). The Lagrange-mesh method. Physics reports, 565, 1-107,

with the primary difference being that this code uses the energy-scaled version of the Bloch-Shrödinger equation, with dimensionless domain, $s = kr$, where $r$ is the radial coordinate and $k$ is the channel wavenumber.

Capable of:

• non-local interactions
• coupled-channels

Simple example