Accession Number : AD1034033

Title :   Single-Shot Readout of a Superconducting Qubit using a Josephson Parametric Oscillator

Descriptive Note : Journal Article - Open Access

Corporate Author : MIT Lincoln Laboratory Lexington United States

Personal Author(s) : Oliver,William D ; Kranz,Philip ; Simoen,Michael ; Gustavsson,Simon ; Wilson,C M ; Shumeiko,Vitaly ; Delsing,Per ; Bylander,Jonas ; Bengtsson,Andreas

Full Text :

Report Date : 11 Jan 2016

Pagination or Media Count : 25

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.

Descriptors :   Quantum Information , QUANTUM THEORY , OSCILLATORS , resonant frequency , parametric instability

Subject Categories : Quantum Theory and Relativity

Distribution Statement : APPROVED FOR PUBLIC RELEASE