Skip to main content

Research Repository

Advanced Search

Demonstrating Quantum Coherence and Metrology that is Resilient to Transversal Noise

Zhang, Chao; Bromley, Thomas R.; Huang, Yun-Feng; Cao, Huan; Lv, Wei-Min; Liu, Bi-Heng; Li, Chuan-Feng; Guo, Guang-Can; Cianciaruso, Marco; Adesso, Gerardo

Authors

Chao Zhang

Thomas R. Bromley

Yun-Feng Huang

Huan Cao

Wei-Min Lv

Bi-Heng Liu

Chuan-Feng Li

Guang-Can Guo

Marco Cianciaruso

Gerardo Adesso



Abstract

© 2019 American Physical Society. Quantum systems can be exploited for disruptive technologies but in practice quantum features are fragile due to noisy environments. Quantum coherence, a fundamental such feature, is a basis-dependent property that is known to exhibit a resilience to certain types of Markovian noise. Yet, it is still unclear whether this resilience can be relevant in practical tasks. Here, we experimentally investigate the resilient effect of quantum coherence in a photonic Greenberger-Horne-Zeilinger state under Markovian bit-flip noise, and explore its applications in a noisy metrology scenario. In particular, using up to six-qubit probes, we demonstrate that the standard quantum limit can be outperformed under a transversal noise strength of approximately equal magnitude to the signal, providing experimental evidence of metrological advantage even in the presence of uncorrelated Markovian noise. This work highlights the important role of passive control in noisy quantum hardware, which can act as a low-overhead complement to more traditional approaches such as quantum error correction, thus impacting on the deployment of quantum technologies in real-world settings.

Journal Article Type Article
Publication Date Nov 1, 2019
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 123
Issue 18
Article Number 180504
APA6 Citation Zhang, C., Bromley, T. R., Huang, Y., Cao, H., Lv, W., Liu, B., …Adesso, G. (2019). Demonstrating Quantum Coherence and Metrology that is Resilient to Transversal Noise. Physical Review Letters, 123(18), https://doi.org/10.1103/physrevlett.123.180504
DOI https://doi.org/10.1103/physrevlett.123.180504
Keywords General Physics and Astronomy
Publisher URL https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.123.180504
Additional Information Demonstrating Quantum Coherence and Metrology that is Resilient to Transversal Noise, Chao Zhang, Thomas R. Bromley, Yun-Feng Huang, Huan Cao, Wei-Min Lv, Bi-Heng Liu, Chuan-Feng Li, Guang-Can Guo, Marco Cianciaruso, and Gerardo Adesso, Phys. Rev. Lett. 123, 180504

Files

Demonstrating Quantum Coherence and Metrology that is Resilient to Transversal Noise (769 Kb)
PDF





You might also like



Downloadable Citations

;