Accession Number:

ADA580651

Title:

Catch-Disperse-Release Readout for Superconducting Qubits

Descriptive Note:

Corporate Author:

CALIFORNIA UNIV RIVERSIDE DEPT OF ELECTRICAL ENGINEERING

Personal Author(s):

• Sete, Eyob A.
• Galiautdinov, Andrei
• Mlinar, Eric
• Martinis, John M.
• Korokov, Alexander N.

Report Date:

2013-03-01

Pagination or Media Count:

6.0

Abstract:

We analyze single-shot readout for superconducting qubits via controlled catch, dispersion, and release of a microwave field. A tunable coupler is used to decouple the microwave resonator from the transmission line during the dispersive qubit-resonator interaction, thus circumventing damping from the Purcell effect. We show that if the qubit frequency tuning is sufficiently adiabatic, a fast high-fidelity qubit readout is possible even in the strongly nonlinear dispersive regime. Interestingly, the Jaynes-Cummings nonlinearity leads to the quadrature squeezing of the resonator field below the standard quantum limit, resulting in a significant decrease of the measurement error.

Descriptors:

• *READ OUT TECHNIQUES
• INFORMATION PROCESSING
• QUANTUM ELECTRODYNAMICS
• QUANTUM THEORY
• RESONATORS
• SUPERCONDUCTIVITY

Subject Categories:

• Computer Hardware

Distribution Statement:

APPROVED FOR PUBLIC RELEASE