Fig. 2: Impact of vibronic coupling on EP transport after off-resonant excitation.
From: Quantum dynamics simulation of exciton-polariton transport
a Real-space resolved total polaritonic density ∣ψpol(x, t)∣2 = ∣ψmol(x, t)∣2 + ∣ψphot(x, t)∣2, molecular and photonic contributions ∣ψmol(x, t)∣2 and ∣ψphot(x, t)∣2, respectively, for vibronic coupling strengths κ = 0, 50, 80 meV. Cyan and orange dashed lines indicate linear motion at the maximum group velocities of LPB (67.9 μm ps−1) and UPB (235 μm ps−1), respectively. Red lines trace the expectation value of the position operator. b Time-dependent population of excited cavity modes ("cav'') and molecular excitons ("mol''). c MSDs extracted from real-space resolved densities in (a). d Expectation value of cavity mode in-plane momentum for propagating EPs in (a). e Initial and final momentum distribution for κ = 80 meV and various detuning Δexc of molecular electronic excitation energy with respect to cavity photon energy ω0. The corresponding resonant wavevector \({k}_{x}^{{{\rm{res}}}}\) is indicated by a black vertical line. All distributions in (e) have been normalized.
