20.500.12556/RUL-154890 Optical manipulation of bipolarons in a system with nonlinear electron-phonon coupling We investigate full quantum mechanical evolution of two electrons nonlinearly coupled to quantum phonons and simulate the dynamical response of the system subject to a short spatially uniform optical pulse that couples to dipole-active vibrational modes. Nonlinear electron-phonon coupling can either soften or stiffen the phonon frequency in the presence of electron density. In the former case, an external optical pulse tuned just below the phonon frequency generates attraction between electrons and leads to a long-lived bound state even after the optical pulse is switched off. It originates from a dynamical modification of the self-trapping potential that induces a metastable state. By increasing the pulse frequency, the attractive electron-electron interaction changes to repulsive. Two sequential optical pulses with different frequencies can switch between attractive and repulsive interaction. Finally, we show that the pulse-induced binding of electrons is shown to be efficient also for weakly dispersive optical phonons, in the presence anharmonic phonon spectrum and in two dimensions. condensed matter physics bipolarons electron-phonon coupling Cooper pairs lattice dynamics optical phonons pairing mechanisms superconducting phase transition ultrafast phenomena 1-dimensional systems nonequilibrium systems Holstein model ultrafast pump-probe spectroscopy materials physics applied physics fizika kondenzirane snovi bipolaroni elektron-fononska sklopitev true false true Angleški jezik Slovenski jezik Članek v reviji 2024-03-07 11:06:16 2024-03-07 11:06:16 2024-09-25 04:18:32 0000-00-00 00:00:00 2024 0 0 6 str. iss. 10, art. 106001 Vol. 132 2024 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 538.9 0031-9007 10.1103/PhysRevLett.132.106001 188007683 2305.09238_(1)_(1).pdf 2305.09238_(1)_(1).pdf 1 FEE861F36633183B74A08796F3D726CD cc8359f3f404896c3ed2cd20eb25f4a1058ce91d5164d135dd7eb5acb43fabfa cefbc66c-7a48-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=191829 https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.132.106001 0 8e3bc5de-dc6a-11ee-966c-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=181528 Fakulteta za matematiko in fiziko 0 0 0