Observation of an anomalous decoherence effect in a quantum bath at room temperature
Open accessAbstract
The decoherence of quantum objects is a critical issue in quantum science and technology. It is generally believed that stronger noise causes faster decoherence. Strikingly, recent theoretical work suggests that under certain conditions, the opposite is true for spins in quantum baths. Here we report an experimental observation of an anomalous decoherence effect for the electron spin-1 of a nitrogen-vacancy centre in high-purity diamond at room temperature. We demonstrate that, under dynamical decoupling, the double-transition can have longer coherence time than the single-transition even though the former couples to the nuclear spin bath as twice strongly as the latter does. The excellent agreement between the experimental and theoretical results confirms the controllability of the weakly coupled nuclear spins in the bath, which is useful in quantum information processing and quantum metrology. Quantum objects are subject to decoherence effects due to the surrounding environment. This study demonstrates experimentally a counterintuitive example of anomalous decoherence, in which electron spins residing at nitrogen vacancy centres in diamond display longer coherence times under stronger noises.
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The initial state of NV center can be prepared by 532nm laser pulse with high fidelity.
“In experiment, the initial state of NV center can be prepared by 532nm laser pulse with high fidelity [29, 30]”
From Quantum speedup in a memory environment (2014) · cites this paper as [30]
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References 51 · Cited by 87
- Authors
- Huang, P., Kong, X., Zhao, N., Shi, F., Wang, P., Rong, X., Liu, R.-B., & Du, J.
- Affiliations
- University of Science and Technology of China (CN)
- Chinese University of Hong Kong (HK)
- Corresponding author
- Liu, Ren-Bao
- Du, Jiangfeng
- Venue
- Nature Communications
- Published
- 2011-12-06
- Volume
- 2
- Issue
- 1
- Pages
- 570-570
- ISSN
- 2041-1723 (ISSN-L)
- PMC
- PMC3247821
- OpenAlex
- W2103377990
- Cited by
- 87
- References
- 51
- Citations by year
- 2025: 3 · 2024: 7 · 2023: 2 · 2022: 3 · 2021: 6 · 2020: 5 · 2019: 4 · 2018: 6 · 2017: 4 · 2016: 5 · 2015: 8 · 2014: 14 · 2013: 12 · 2012: 8
- FWCI
- 5.33
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Nature Communications (publishedVersion, cc-by-nc-sa)
- Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-sa)
- PubMed Central (publishedVersion, cc-by-nc-sa)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- RePEc: Research Papers in Economics (submittedVersion)
- arXiv (Cornell University)
- Funders
- National Natural Science Foundation of China (10834005, 11028510)
- Chinese Academy of Sciences
- Chinese University of Hong Kong
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Diamond and Carbon-based Materials Research
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum and electron transport phenomena
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Keywords
- electron spin decoherence, nitrogen-vacancy centers, diamond, nuclear spin bath, dynamical decoupling, coherence time, double transition, room-temperature spin coherence
- MeSH terms
- Carbon Isotopes, Crystallization, Electron Spin Resonance Spectroscopy, Electrons, Information Theory, Lasers, Microwaves, Models, Theoretical, Nitrogen, Quantum Theory, Temperature, Diamond, Spin Trapping, Nanotechnology
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