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Activation of indistinguishability-based quantum coherence for enhanced metrological applications with particle statistics imprint

Sun, Kai; Liu, Zheng-Hao; Wang, Yan; Hao, Ze-Yan; Xu, Xiao-Ye; Xu, Jin-Shi; Li, Chuan-Feng; Guo, Guang-Can; Castellini, Alessia; Lami, Ludovico; Winter, Andreas; Adesso, Gerardo; Compagno, Giuseppe; Lo Franco, Rosario

Authors

Kai Sun

Zheng-Hao Liu

Yan Wang

Ze-Yan Hao

Xiao-Ye Xu

Jin-Shi Xu

Chuan-Feng Li

Guang-Can Guo

Alessia Castellini

Ludovico Lami

Andreas Winter

Giuseppe Compagno

Rosario Lo Franco



Abstract

Quantum coherence, an essential feature of quantum mechanics allowing quantum superposition of states, is a resource for quantum information processing. Coherence emerges in a fundamentally different way for nonidentical and identical particles. For the latter, a unique contribution exists linked to indistinguishability that cannot occur for nonidentical particles. Here, we experimentally demonstrate this additional contribution to quantum coherence with an optical setup, showing that its amount directly depends on the degree of indistinguishability, and exploiting it in a quantum phase discrimination protocol. Furthermore, the designed setup allows for simulating fermionic particles with photons, thus assessing the role of exchange statistics in coherence generation and utilization. Our experiment proves that independent indistinguishable particles can offer a controllable resource of coherence and entanglement for quantum-enhanced metrology.

Citation

Sun, K., Liu, Z., Wang, Y., Hao, Z., Xu, X., Xu, J., …Lo Franco, R. (2022). Activation of indistinguishability-based quantum coherence for enhanced metrological applications with particle statistics imprint. Proceedings of the National Academy of Sciences, 119(21), Article e2119765119. https://doi.org/10.1073/pnas.211976511

Journal Article Type Article
Acceptance Date Mar 29, 2022
Online Publication Date May 20, 2022
Publication Date May 24, 2022
Deposit Date Mar 31, 2022
Publicly Available Date May 26, 2022
Journal Proceedings of the National Academy of Sciences
Print ISSN 0027-8424
Publisher National Academy of Sciences
Peer Reviewed Peer Reviewed
Volume 119
Issue 21
Article Number e2119765119
DOI https://doi.org/10.1073/pnas.211976511
Public URL https://nottingham-repository.worktribe.com/output/7680811
Publisher URL https://www.pnas.org/doi/full/10.1073/pnas.2119765119

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