Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session N07: Quantum Control in Manybody Systems
8:00 AM–10:00 AM,
Thursday, June 6, 2024
Room: 203A
Chair: Jabir Chathanathil, Army Research Laboratory
Abstract: N07.00004 : Protecting Quantum Information via Destructive Interference of Correlated Noise*
8:36 AM–8:48 AM
Presenter:
Alon Salhov
(The Hebrew University of Jerusalem)
Authors:
Alon Salhov
(The Hebrew University of Jerusalem)
Qingyun Cao
(Ulm University)
Jianming Cai
(Huazhong University of Science and Technology)
Alex Retzker
(The Hebrew University of Jerusalem)
Fedor Jelezko
(Ulm University)
Genko Genov
(Ulm University)
In this work, we propose and experimentally demonstrate a protection strategy that leverages a new kind of resource – the cross-correlation of two noise sources, e.g. control fields. Such cross-correlations exist when the control fields are generated from the same source or pass through the same transmission line.
As an example, we modify the continuous concatenated dynamical decoupling control scheme. As we show, introducing a frequency shift to one of the control fields, which is proportional to the degree of cross-correlation, results in destructive interference of the cross-correlated noise. Our scheme results in a tenfold increase in the coherence time of a single NV center in diamond, and outperforms the widely used XY8 sequence. Furthermore, we demonstrate the magnetometry of GHz signals with record sensitivity and robust qubit operations.
In light of recent characterizations of noise cross-correlations in quantum systems, our contribution opens a new avenue in the field of noise protection for quantum technologies.
*A.S. gratefully acknowledges the support of the Clore Israel Foundation Scholars Programme, the Israeli Council for Higher Education, and the Milner Foundation. This work was supported by DFG projects 445243414, 499424854 (QUANTERA), 387073854, 386028944 (Forschungsgroßgeräte), 491245864 (Großgeräteinitiative), CRC 1279 and Excellence cluster POLiS, as well as BMBF and the European Union's Horizon 2020 research and innovation program under grant agreement No 820394 (ASTERIQS), ERC Synergy grant HyperQ (Grant No. 856432), and EU projects C-QuENS, SPINUS, FLORIN, QCIRCLE. A.R. acknowledges the support of ERC grant QRES, project number 770929, Quantera grant MfQDS, ISF and the Schwartzmann university chair. J. M. acknowledges the National Natural Science Foundation of China (Grants No. 12161141011).
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