# rydmr_exp.m

Singlet-singlet RYDMR experiment with exponential recombination function. This is a spin chemistry experiment involving a radical pair. See http://dx.doi.org/10.1080/00268979809483134 for a detailed description.

## Syntax

    A=rydmr_exp(spin_system,parameters,H,R,K)


## Arguments

    parameters.fields     -   row vector of field values, Tesla

parameters.rates      -   row vector of singlet recombination
rate constants, Hz

parameters.electrons  -   numbers identifying the two electrons
in the isotope list, e.g. [1 2]

parameters.needs      -   must contain 'zeeman_op', this is an
instruction to the kernel to provide a
separate Zeeman operator for field sweep
purposes


## Outputs

    A - a matrix of singlet yields with dimensions
matching the sizes of parameters.rates and
parameters.fields



## Examples

The following calculation (singlet_yield_5.m in examples/spin_chemistry) reproduces Figure 5 from the reference cited above.

Figure 5 from the paper by Timmel, Till, Brocklehurst, McLauchlan and Hore.

## Notes

The function uses resolvent transforms in Liouville space and auxiliary matrices in Hilbert space. Exponential recombination kinetics is built into this function, do not combine with inter.chem.rp_rates parameter. If a more accurate description of recombination kinetics is required, use rydmr.m function.