Tunable resonators for quantum circuits

Abstract

We have designed, fabricated and measured high-Q $\lambda /2$ coplanar waveguide microwave resonators whose resonance frequency is made tunable with magnetic field by inserting a DC-SQUID array (including 1 or 7 SQUIDs) inside. Their tunability range is 30% of the zero field frequency. Their quality factor reaches up to 3$\times 10^4$. We present a model based on thermal fluctuations that accounts for the dependance of the quality factor with magnetic field.

subm. to JLTP (Proc. of LTD12 conference)

References in corpus (5)

• Coupling Superconducting Qubits via a Cavity Bus
• Coherent quantum state storage and transfer between two phase qubits via a resonant cavity
• A widely tunable parametric amplifier based on a SQUID array resonator
• Selective coupling of superconducting qubits via tunable stripline cavity
• RF bifurcation of a Josephson junction: microwave embedding circuit requirements

Cited by in corpus (6)

• Two-resonator circuit QED: A superconducting quantum switch
• Contribution of dielectrics to frequency and noise of NbTiN superconducting resonators
• Magnetic field tuning of coplanar waveguide resonators
• Spectrum of Andreev Bound States in a Molecule Embedded Inside a Microwave-Excited Superconducting Junction
• Phase sensitive amplification in a superconducting stripline resonator integrated with a dc-SQUID
• Implementation of the three-qubit phase-flip error correction code with superconducting qubits