Optimized dynamical decoupling in a model quantum memory
Open accessAbstract
Any quantum system, such as those used in quantum information or magnetic resonance, is subject to random phase errors that can dramatically affect the fidelity of a desired quantum operation or measurement. In the context of quantum information, quantum error correction techniques have been developed to correct these errors, but resource requirements are extraordinary. The realization of a physically tractable quantum information system will therefore be facilitated if qubit (quantum bit) error rates are far below the so-called fault-tolerance error threshold, predicted to be of the order of 10(-3)-10(-6). The need to realize such low error rates motivates a search for alternative strategies to suppress dephasing in quantum systems. Here we experimentally demonstrate massive suppression of qubit error rates by the application of optimized dynamical decoupling pulse sequences, using a model quantum system capable of simulating a variety of qubit technologies. We demonstrate an analytically derived pulse sequence, UDD, and find novel sequences through active, real-time experimental feedback. The latter sequences are tailored to maximize error suppression without the need for a priori knowledge of the ambient noise environment, and are capable of suppressing errors by orders of magnitude compared to other existing sequences (including the benchmark multi-pulse spin echo). Our work includes the extension of a treatment to predict qubit decoherence under realistic conditions, yielding strong agreement between experimental data and theory for arbitrary pulse sequences incorporating nonidealized control pulses. These results demonstrate the robustness of qubit memory error suppression through dynamical decoupling techniques across a variety of qubit technologies.
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Further characterization of magnetic field noise by applying different orders of the Uhrig dynamical decoupling sequence yielded extracted coherence times of 3.2(1) ms, 5.8(3) ms and 8.0(7) ms for orders 1, 3 and 5, respectively.
“Further characterization of the magnetic field noise is performed by applying different orders of the Uhrig dynamical decoupling sequence40,41, with the resulting extracted coherence time from the measurements being 3.2(1) ms, 5.8(3) ms and 8.0(7) ms for orders 1, 3 and 5, respectively.”
From Penning micro-trap for quantum computing (2024) · cites this paper as [41]
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“Further characterization of the magnetic field noise is performed by applying different orders of the Uhrig dynamical decoupling sequence 40,41 , with the resulting extracted coherence time from the measurements being 3.2(1) ms, 5.8(3) ms and 8.0(7) ms for orders 1, 3 and 5, respectively.”
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“…assuming so-called ‘embarrassing parallelization’ (by means of slicing) into independent computations involving various amounts of available memory (corresponding to cotengra contraction widths of = 30 , 49 and 54) and were obtained using (sliced) simulated annealing built into cotengra 107 .”
- Authors
- Biercuk, M. J., Uys, H., VanDevender, A. P., Shiga, N., Itano, W. M., & Bollinger, J. J.
- Affiliations
- National Institute of Standards and Technology (US)
- Corresponding author
- Biercuk, Michael J.
- Venue
- Nature
- Published
- 2009-04
- Volume
- 458
- Issue
- 7241
- Pages
- 996-1000
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W2123364531
- Cited by
- 654
- References
- 3
- Citations by year
- 2026: 26 · 2025: 42 · 2024: 27 · 2023: 49 · 2022: 24 · 2021: 34 · 2020: 23 · 2019: 29 · 2018: 20 · 2017: 35 · 2016: 49 · 2015: 34 · 2014: 43 · 2013: 44 · 2012: 54
- FWCI
- 62.80
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Nature (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- RePEc: Research Papers in Economics (submittedVersion)
- arXiv (Cornell University)
- Funders
- Georgia Institute of Technology
- National Institute of Standards and Technology
- Intelligence Advanced Research Projects Activity
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum optics and atomic interactions
- Keywords
- dynamical decoupling, dephasing, quantum memory, quantum error correction, real-time feedback, qubit decoherence, spin echo, fault-tolerant quantum computing, open quantum systems, quantum information processing, magnetic resonance
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