Flow-equation approach to quantum systems driven by an amplitude-modulated time-periodic force
Viktor Novičenko,
Giedrius Žlabys,
Egidijus Anisimovas
Abstract:We apply the method of flow equations to describe quantum systems subject to a time-periodic drive with a time-dependent envelope. The driven Hamiltonian is expressed in terms of its constituent Fourier harmonics with amplitudes that may vary as a function of time. The time evolution of the system is described in terms of the phase-independent effective Hamiltonian and the complementary micromotion operator that are generated by deriving and solving the flow equations. These equations implement the evolution w… Show more
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