The role of quantum memory in ultrafast, nonperturbative lightwave electronics is discussed with several examples involving one- and two-dimensional quantum materials. Since interactions are strong in these materials, scattering emerges often on sub-100fs timescales. Nevertheless, quantum memory has extremely important implications for lightwave electronics – several examples will be given to demonstrate how omitting quantum memory eliminates many key effects of measured in lightwave electronics. These insights have direct implications to all aspects of lightwave electronics, including multi-photon absorption, optical switching, and high-harmonic generation.
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