A self-consistent variational calculation of the driven 2D Hubbard model finds multiphoton-tunneling cooperation and dephasing-induced linear absorption in subgap-pumped Mott insulators, along with real-time feedback from gap renormalization.
On the other hand, (∂φ) ω mostly gets contributions at frequencies set by the pump field strengthE(via Bloch oscillations) or the pump frequency ωd itself
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Subgap pumping of antiferromagnetic Mott insulators: photoexcitation mechanisms and applications
A self-consistent variational calculation of the driven 2D Hubbard model finds multiphoton-tunneling cooperation and dephasing-induced linear absorption in subgap-pumped Mott insulators, along with real-time feedback from gap renormalization.