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License: GNU General Public License v2.0
qdas modified for CMRT
License: GNU General Public License v2.0
QDAS: Quantum Dynamics And Spectroscopy Calculate linear and various third-order nonlinear spectrum for a multilevel excitonic system using a quantum master equation formalism; the dynamics can be generated too. To checkout a working copy from Github: git clone [email protected]:yuanchung/qdas.git qdas The code uses exciton theory and non-Markovian quantum master equation to simulate quantum dynamics of multilevel quantum systems. In the code, the density matrix of a system is propagated using an efficient iterative Crank-Nicholson propagator. In addition, the code handles multiple external fields (laser pulses) and extracts third-order polarization from field-dependent density matrix dynamics, which enables it to simulate electronic four-wave mixing signals such as three-pulse photon-echo peakshift measurements. Shell scripts that help to setup and process 2D and 3PEPS jobs are included in the "scripts/" directory. For how to simulate a 2D spectrum, see scripts/2d/README . Modules: tnl-lineshape: calculates linear absorption spectrum for multilevel excitonic system including homogeneous broading and Monte-Carlo Gaussian static disorders. tnl: Time-Nonlocal Module that contains tnl-dm3pes and tnl-dynamics
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