Dnp field scan.m
Magnetic field scan steady-state DNP experiment.
Returns the steady-state population of the user-specified state as a function of magnetic field.
parameters.mw_pwr - microwave power, Hz parameters.mw_frq - microwave frequency, Hz parameters.fields - a vector of B0 field values, T parameters.rho_eq - thermal equilibrium state parameters.coil - detection state vector or a horizon- tal stack thereof parameters.mw_oper - microwave irradiation operator parameters.ez_oper - Lz operator on the electrons parameters.method - 'backslash' to use Matlab's linear equation solver, 'gmres' to use ILU preconditioned GMRES H - Hamiltonian commutation superoperator R - unthermalised relaxation superoperator K - chemical kinetics superoperator
answer - the projection of the equilibrium density matrix on the user-specified state as a function of the applied magnetic field
Cross effect in a system with two spin-1/2 electrons (cross_effect_field_scan_1.m example file in examples/dnp_solids directory):
Solid effect in a system with a spin-7/2 gadolinium ion (solid_effect_field_scan_1.m example file in examples/dnp_solids directory):
- The relaxation superoperator supplied to this function should NOT be thermalized.
- Thermal equilibrium state is assumed to be the same at all fields in the sweep. Do not use this function for broad magnetic field sweep experiments.
- Backslash method is recommended for small spin systems and GMRES method for large ones.
- This function can be made to run on GPUs. If you would like that functionality added, send an email to Ilya Kuprov.