# Microscopic theory of photoassisted electronic transport in normal-metal/BCS-superconductor junctions

@article{BertinJohannet2022MicroscopicTO, title={Microscopic theory of photoassisted electronic transport in normal-metal/BCS-superconductor junctions}, author={Bruno Bertin-Johannet and J{\'e}r{\^o}me Rech and Thibaut Jonckheere and Beno{\^i}t Gr{\'e}maud and Laurent Raymond and Thierry Martin}, journal={Physical Review B}, year={2022} }

We investigate photo assisted electronic transport in a normal-metal/BCS-superconductor junction with a microscopic Hamiltonian approach, for several types of periodic voltage drives applied on the normal-metal side. The time-dependent current and the photo-assisted noise are computed to all orders of the tunneling Hamiltonian using a Keldysh-Nambu-Floquet approach. An excess noise analysis allows one to determine to what extent pure electronic excitations with a small number of electrons per…

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