generate_CMDS
Executes multiple simulation runs in order to calculate two-dimensional (2D) spectra.
Contents
Syntax
- c.generate_CMDS(name)
Description
- c.generate_CMDS(name) calculates 2D spectra for a given entity 'name'.
Detailed Description and Examples
Generate CMDS executes multiple simulation runs for various delay and phase combinations of a given pulse sequence. Calculations can be parallelized (one sequence per core) if c.parallel is set to true (parallel computing toolbox required).
% For detailed information on how to use CMDS class see: % www.qd-toolbox.org/tutorials
Example input code for a three-pulse 2D simulation.
s = System; s.lso = true; %allow calculation via Lindblad Superoperators c = CMDS(s); c.parallel = false; %do not use the parallel computing toolbox s.setTmax(400*s.fstoau); %length of the simulation time axis: 400 fs s.setTimestep(0.1*s.fstoau);%stepsize of the simulation time axis: 0.1 fs %Parameters of the external light fields gamma0 = 0; %full rotating frame E0 = 2.0*s.evtoau; %center energy of the external field: 2.0 eV amp = 5e-4; %external field amplitude t_pulse = 20*fstoau; %pulse duration %Parameters of the 2D simulation c.setdelayMaxs([100 90 90]*s.fstoau); %define offset and maximum delays in femtoseconds. c.setdelaySteps([31 31]); %define number of delay steps c.setPcScheme([1 5 2]); %define the phase cycling scheme c.setContributions([-1 2 -1]); %define a default contribution of the utilized phase cycling scheme c.setReturnFunction(returnExcited); %sets the return function (here: time-integrated population density matrix element of the first excited state) %Note: the return function can be customized by the user %Parameters of the system gaps = [2.0*s.evtoau]; %define energy gap between the lowest two levels. Here: 2 eV energy separation between ground and excited state of the qbit a = Nlevel(gaps); a.setDipole([1 0], 1); s.addEntity(a, 'qbit'); a.addDissipation('qbit', 200*s.fstoau, [1 0]); s.addDecoherence('qbit', 50*s,fstoau, [1 0]); % run the simulation c.generate_CMDS('qbit');
No public field lso exists for class System. Error in generate_CMDS_doc (line 19) s.lso = true; %allow calculation via Lindblad Superoperators