Bittner, Nikolaj Tohyama, Takami Kaiser, Stefan Manske, Dirk 2019-03-13 Using a nonequilibrium implementation of the Lanczos-based exact diagonalisation technique we study the possibility of the light-induced superconducting phase coherence in a solid state system after an ultrafast optical excitation. In particular, we investigate the buildup of superconducting correlations by calculating an exact time- dependent wave function reflecting the properties of the system in non-equilibrium and the corresponding transient response functions. Within our picture we identify a possible transient Meissner effect after dynamical quenching of the non- superconducting wavefunction and extract a characteristic superfluid density that we compare to experimental data. Finally, we find that the stability of the induced superconducting state depends crucially on the nature of the excitation quench: namely, a pure interaction quench induces a long-lived superconducting state, whereas a phase quench leads to a short-lived transient superconductor. application/pdf https://folia.unifr.ch/global/documents/307818 https://folia.unifr.ch/documents/307818/files/bitt_pli.pdf https://folia.unifr.ch/documents/307818/files/bitt_pli_sm.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.7566/JPSJ.88.044704 info:eu-repo/semantics/openAccess License undefined Journal of the Physical Society of Japan. - 2019, vol. 88, no. 4, p. 044704 info:eu-repo/classification/udc/53 Possible light-induced superconductivity in a strongly correlated electron system http://purl.org/coar/resource_type/c_6501