Fig. 5: Optical conductivity with and without the pump.
From: Tensor network study of the light-induced phase transitions in vanadium dioxide
a, b The current density 〈jprobe(t)〉 due to the presence of probe pulse with frequency ℏωprobe = 10 eV, width σprobe = 0.658 fs, and amplitude A0,probe = 0.01. The center time t0,probe of the probe pulse is 0.0658 fs for (a) and 26 fs (blue) or 39 fs (orange) for (b). For the cases with pump, we only plot the current up to time ~20 fs after the probe pulse centered at t*. For longer times, the numerical errors are not ignorable (see Supplementary Information). c, d The real part of the optical conductivity obtained from 〈jprobe(t)〉 shown in (a) and (b), respectively. For the pump pulse, the amplitude is chosen as A0,pump = 1.88, and other parameters are the same as in Fig. 4. The iTEBD simulation is performed using a time step δt = 3.29 × 10−3 fs and maximal bond dimension D = 1000, and we set η = 0.15 fs−1 in the numerical Fourier transformation.
