Single-Shot Readout of a Superconducting Qubit using a Josephson Parametric Oscillator
Abstract
We propose and demonstrate a new read-out technique for a superconducting qubit by dispersivelycoupling it to a Josephson parametric oscillator. We employ a tunable quarter-wavelength super-conducting resonator and modulate its resonant frequency at twice its value with an amplitude sur-passing the threshold for parametric instability. We map the qubit states onto two distinct states ofclassical parametric oscillation: one oscillating state, with 18515 photons in the resonator, and onewith zero oscillation amplitude. This high contrast obviates a following quantum-limited amplier.We demonstrate proof-of-principle, single-shot readout performance, and present an error budgetindicating that this method can surpass the delity threshold required for quantum computing.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 11, 2016
- Accession Number
- AD1034033
Entities
People
- Andreas Bengtsson
- C. M. Wilson
- Jonas Bylander
- Michael Simoen
- Per Delsing
- Philip Kranz
- Simon Gustavsson
- Vitaly Shumeiko
- William D Oliver
Organizations
- MIT Lincoln Laboratory