Single-shot correlations and two-qubit gate of solid-state spins
Abstract
Measurement of coupled quantum systems plays a central role in quantum information processing. We have realized independent single-shot read-out of two electron spins in a double quantum dot. The read-out method is all-electrical, cross-talk between the two measurements is negligible, and read-out fidelities are ∼86% on average. This allows us to directly probe the anticorrelations between two spins prepared in a singlet state and to demonstrate the operation of the two-qubit exchange gate on a complete set of basis states. The results provide a possible route to the realization and efficient characterization of multiqubit quantum circuits based on single quantum dot spins.
Date Published
Journal
Science
Volume
333
Issue
6047
Number of Pages
1269-1272,
URL
https://www.scopus.com/inward/record.uri?eid=2-s2.0-80052505464&doi=10.1126%2fscience.1209524&partnerID=40&md5=d107f955eb07b04f048813a5740d9e9e
DOI
10.1126/science.1209524
Research Area
Group (Lab)
Katja Nowack Group