Magnus expansion is used to identify effective Hamiltonians describing the coarse-grained dynamics of more complex problems. Here, we apply this method to a two-level system driven by an AC field. We derive Stark and Bloch-Siegert shifts of both diagonal and off-diagonal entries of the Hamiltonian as a result of coarse graining only.
Coarse-grained dynamics of ac-driven two-state systems
Macri, N;Giannelli, L;Rajendran, J;Paladino, E;
2022-01-01
Abstract
Magnus expansion is used to identify effective Hamiltonians describing the coarse-grained dynamics of more complex problems. Here, we apply this method to a two-level system driven by an AC field. We derive Stark and Bloch-Siegert shifts of both diagonal and off-diagonal entries of the Hamiltonian as a result of coarse graining only.File in questo prodotto:
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