20.500.12556/RUL-177293 Chirped amplitude mode in photoexcited superconductors Using a state-of-the-art numerical scheme, we show that the Higgs mode under excitation exhibits chirped oscillations and exponential decay when fluctuations are included. This is in stark contrast to conventional BCS collisionless dynamics which predict power-law decay and the absence of chirping. The chirped amplitude mode enables us to determine the local modification of the effective potential even when the system is in a long-lived prethermal state. We then show that this chirped amplitude mode is an experimentally observable quantity since the photoinduced (super)current in pump-probe experiments serves as an efficient proxy for the order parameter dynamics, including the chirped dynamics. Our result is based on the attractive Hubbard model using dynamical mean-field theory within the symmetry-broken state after a excitation across the superconducting gap. Since the collective response involves long timescales, we extend the hierarchical low-rank compression method for nonequilibrium Green's functions to symmetry-broken states and show that it serves as an efficient representation despite long-lived memory kernels. condensed matter physics superconductivity light-matter interactions fizika kondenzirane snovi superprevodnost interakcije svetloba-snov true false true Angleški jezik Slovenski jezik Članek v reviji 2025-12-19 14:16:26 2025-12-19 14:16:27 2025-12-29 04:17:54 0000-00-00 00:00:00 2025 0 0 Str. 094502-1-094502-9 iss. 9 Vol. 111 2025 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 538.9 2469-9950 10.1103/PhysRevB.111.094502 262312195 Chirped_amplitude_mode_in_photoexcited_superconductors.pdf Chirped_amplitude_mode_in_photoexcited_superconductors.pdf 1 4F5A579CCC9075B5FD3E86DD54366508 270f38b207995505fe1a7ac059d6fd30808c28e1c8cbd6d0725d7313fa8bc10b c9aeb496-dcdd-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=224252 https://journals.aps.org/prb/abstract/10.1103/PhysRevB.111.094502 0 d209b4fa-dcdd-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=224253 Fakulteta za matematiko in fiziko 0 0 0