Difference between revisions of "Propagator.m"
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P=propagator(spin_system,L,timestep) | P=propagator(spin_system,L,timestep) | ||
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L - Hamiltonian or Liouvillian matrix | L - Hamiltonian or Liouvillian matrix | ||
Revision as of 18:51, 5 June 2026
Calculates exponential propagator exp(-i*L*timestep) using scaled and squared Taylor series method.
Syntax
P=propagator(spin_system,L,timestep)
Parameters
L - Hamiltonian or Liouvillian matrix timestep - propagation time step
Outputs
P - propagator matrix
Notes
- GPUs are supported, add 'gpu' to sys.enable array during calculation setup.
- Propagator caching (https://doi.org/10.1063/1.4928978) is supported, add 'caching' to sys.enable array during calculation setup.
- We did have Chebyshev and Newton series here at one point, as well as the Pade method. None of them lived up to their marketing.
See also
evolution.m, krylov.m, step.m, shaped_pulse_af.m, shaped_pulse_xy.m, equilibrium.m
Version 2.2, authors: Ilya Kuprov, Luke Edwards
