title: Proposal for a transmon-based quantum router.
abstract: We propose an implementation of a quantum router for microwave photons in a superconducting qubit architecture consisting of a transmon qubit, SQUIDs and a nonlinear capacitor. We model and analyze the dynamics of operation of the quantum switch using quantum Langevin equations in a scattering approach and compute the photon reflection and transmission probabilities. For parameters corresponding to up-to-date experimental devices we predict successful operation of the router with probabilities above 94%.
authors.affiliation: Lorentz Institute for Theoretical Physics, University of Leiden, 2333 CA Leiden, The Netherlands. Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1. 2628 CJ Delft, The Netherlands.
authors.forename: Arnau
authors.initials: A
authors.lastname: Sala
authors.forename: M
authors.initials: M
authors.lastname: Blaauboer