# relaxation.m

From Spinach Documentation Wiki

Relaxation superoperator.

## Contents

## Syntax

R=relaxation(spin_system,euler_angles)

## Arguments

euler_angles - (optional) spin system orientation, for solid state systems at low temperature, where the thermal equilibrium depends on the orientation

## Outputs

R - relaxation superoperator

## Notes

- A variety of relaxation theories are supported, see the relaxation theory parameters section of the online manual.
- Spinach context functions include kinetics superoperators into the total Liovillian automatically.
- The function has been written for minimal memory footprint and performs aggressive memory recycling. Relaxation superoperator dimensions in excess of 1,000,000 are in practice feasible.

## See also

equilibrium.m, thermalize.m, hamiltonian.m, lindbladian.m, kinetics.m, magpump.m

*Version 2.2, authors: Ilya Kuprov, Luke Edwards, Alexander Karabanov, Walter Kockenberger*