A Superconducting 180° Hybrid Ring Coupler for circuit Quantum Electrodynamics
arXiv:1009.5879 · doi:10.1063/1.3522650
Abstract
Superconducting circuit quantum electrodynamics experiments with propagating microwaves require devices acting as beam splitters. Using niobium thin films on silicon and sapphire substrates, we fabricated superconducting 180° microstrip hybrid ring couplers, acting as beam splitters with center frequencies of about 6GHz. For the magnitude of the coupling and isolation we find -3.5+/-0.5dB and at least -15dB, respectively, in a bandwidth of 2GHz. We also investigate the effect of reflections at the superconductor-normal conductor contact by means of low temperature laser scanning microscopy. Our measurements show that our hybrid rings are well suited for on-chip applications in circuit quantum electrodynamics experiments.
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- Dual-Path Methods for Propagating Quantum Microwaves
- Quantum magneto-electrodynamics of electrons embedded in a photon cavity
- Quantum Simulation with a Boson Sampling Circuit
- Proposal for a transmon-based quantum router