The dissipation and decoherence in unitary evolution schemes of quantum physics was discussed. The master equations of damped, driven two-level system were used in the density matrix. The elements of density matrix were embedded in higher-dimensional Liouville-Bloch equations. The density matrix was solved as a function of time using nonunitary integration.
Publication Source (Journal or Book title)
Physical Review Letters
Rau, A., & Wendell, R. (2002). Embedding dissipation and decoherence in unitary evolution schemes. Physical Review Letters, 89 (22), 2204051-2204054. https://doi.org/10.1103/PhysRevLett.89.220405