Protecting qubit coherence by spectrally engineered driving of the spin environment

Journal Article · 29 April 2022 · npj Quantum Information

DOI: https://doi.org/10.1038/s41534-022-00560-0 · OSTI ID:1866016

Joos, Maxime; Bluvstein, Dolev; Lyu, Yuanqi ; Weld, David ; Bleszynski Jayich, Ania

Abstract Modern quantum technologies rely crucially on techniques to mitigate quantum decoherence; these techniques can be either passive, achieved for example via materials engineering, or active, typically achieved via pulsed monochromatic driving fields applied to the qubit. Using a solid-state defect spin coupled to a microwave-driven spin bath, we experimentally demonstrate a decoherence mitigation method based on spectral engineering of the environmental noise with a polychromatic drive waveform, and show that it outperforms monochromatic techniques. Results are in agreement with quantitative modeling, and open the path to active decoherence protection using custom-designed waveforms applied to the environment rather than the qubit.

• Research Organization: University of California, Santa Barbara, CA (United States)
• Sponsoring Organization: Defense Advanced Research Projects Agency (DARPA); Fannie and John Hertz Foundation; National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: SC0019241
• OSTI ID: 1866016
• Journal Information: npj Quantum Information, Journal Name: npj Quantum Information Journal Issue: 1 Vol. 8; ISSN 2056-6387
• Publisher: Nature Publishing GroupCopyright Statement
• Country of Publication: United Kingdom
• Language: English