Noise-resilient quantum evolution steered by dynamical decoupling
Publication in refereed journal

Times Cited
Web of Science44WOS source URL (as at 06/08/2020) Click here for the latest count
Altmetrics Information

Other information
AbstractRealistic quantum computing is subject to noise. Therefore, an important frontier in quantum computing is to implement noise-resilient quantum control over qubits. At the same time, dynamical decoupling can protect the coherence of qubits. Here we demonstrate non-trivial quantum evolution steered by dynamical decoupling control, which simultaneously suppresses noise effects. We design and implement a self-protected controlled-NOT gate on the electron spin of a nitrogen-vacancy centre and a nearby carbon-13 nuclear spin in diamond at room temperature, by employing an engineered dynamical decoupling control on the electron spin. Final state fidelity of 0.91(1) is observed in preparation of a Bell state using the gate. At the same time, the qubit coherence time is elongated at least 30 fold. The design scheme does not require the dynamical decoupling control to commute with the qubit interaction and therefore works for general qubit systems. This work marks a step towards implementing realistic quantum computing systems.
All Author(s) ListLiu GQ, Po HC, Du JF, Liu RB, Pan XY
Journal nameNature Communications
Volume Number4
PublisherNature Publishing Group: Nature Communications / Nature Publishing Group
LanguagesEnglish-United Kingdom
Web of Science Subject CategoriesMultidisciplinary Sciences; MULTIDISCIPLINARY SCIENCES; Science & Technology - Other Topics

Last updated on 2020-07-08 at 01:08