Kinetic inductance traveling-wave amplifiers for multiplexed qubit readout
Abstract
We describe a kinetic inductance traveling-wave (KIT) amplifier suitable for superconducting quantum information measurements and characterize its wideband scattering and noise properties. We use mechanical microwave switches to calibrate the four amplifier scattering parameters up to the device input and output connectors at the dilution refrigerator base temperature and a tunable temperature load to characterize the amplifier noise. Finally, we demonstrate the high fidelity simultaneous dispersive readout of two superconducting transmon qubits. The KIT amplifier provides low-noise amplification of both readout tones with readout fidelities of 83% and 89% and negligible effect on qubit lifetime and coherence.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 10, 2018
- Source ID
- 10.1063/1.5063252
Entities
People
- D. Pappas
- G. Ribeill
- H.-s. Ku
- Judith Long
- Kin Chung Fong
- L. Ranzani
- Mustafa Bal
- Robert P Erickson
- Thomas Ohki
- Xinghua Wu
Organizations
- Intelligence Advanced Research Projects Activity
- Jet Propulsion Laboratory
- National Institute of Standards and Technology
- RTX