2022 Fiscal Year Annual Research Report
Novel photon blockade effects with exceptional points
| Project/Area Number |
22F22018
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| Allocation Type | Single-year Grants |
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| Research Institution | Institute of Physical and Chemical Research |
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Principal Investigator |
NORI FRANCO 国立研究開発法人理化学研究所, 開拓研究本部, 主任研究員 (50415262)
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| Co-Investigator(Kenkyū-buntansha) |
HUANG RAN 国立研究開発法人理化学研究所, 開拓研究本部, 外国人特別研究員
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| Project Period (FY) |
2022-07-27 – 2025-03-31
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| Keywords | photon blockad / non-Hermitian coupling / optical mode / phonon lasers |
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| Outline of Annual Research Achievements |
The key idea of this project is investigating novel photon blockade effects with exceptional points (EPs). Specifically, we have studied:
(i) Exceptional photon blockade [Laser & Photonics Reviews 16, 2100430 (2022); first author]. We study photon blockade effects with exceptional points in a microcavity with non-dissipative non-Hermitian coupling between the countercirculating modes. We find that a purely quantum effect, known as single-photon blockade emerges due to EP-induced asymmetric coupling between the optical modes and the nonlinearity-induced anharmonic energy-level spacing.
(ii) Loss-induced photon blockade [Physical Review A 106, 043715 (2022); co-corresponding author]. By harnessing EPs, we find that photon blockade can be revived with the help of loss in a nonlinear optical-molecule system. Also, a quantum switch between single-photon blockade and two-photon blockade can be realized by simply tuning the loss.
(iii) Nonlinear multi-frequency phonon lasers [Nature Physics 19, 414-419 (2023); co-first author]. Phonon laser, as an analog of photon laser, exploits coherent amplifications of phonons. We report a multiple-frequency phonon laser in a levitated optomechanical system with optical gain.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
1Our research focus on the theoretical studies of photon blockade effects with exceptional points. We have explored such novel quantum effect, namely exceptional photon blockade [Laser & Photonics Reviews 16, 2100430 (2022)], and also studied its potential application, i.e., revival of quantum effect with the help of loss, and quantum switch of single- or two-photon devices by tuning loss [Physical Review A 106, 043715 (2022)]. These works meet the short-term goals of this project: to implement novel photon blockade effects with exceptional points in optical cavities, and to improve the performance of single-photon devices in quantum information processing. Moreover, we studied the novel phonon lasing effect, an analog of photon lasing [Nature Physics 19, 414-419 (2023)], in which the optical gain and the measurements of correlation functions may benefit for the experimental realization of exceptional photon blockade.
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| Strategy for Future Research Activity |
We will extend our studies of the photon blockade effect with exceptional points, to quantum effects in non-Hermitian systems. We study the quantum correlations in a non-Hermitian system and find the chirality-induced quantum nonreciprocity of bipartite correlations due to the non-Hermitian atom-light interactions. This work may shed new light on largely unexplored directions by bringing together non-Hermiticity, chirality, nonreciprocity, and Floquet physics, for achieving and tuning one-way multipartite quantum correlations, and enabling new ways for assembling chirality-controlled quantum nonreciprocal devices.
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[Journal Article] Nonlinear multi-frequency phonon lasers with active levitated optomechanics2023
Author(s)
T. Kuang, R. Huang, W. Xiong, Y. Zuo, X. Han, F. Nori, C.-W. Qiu*, H. Luo*, H. Jing*, and G. Xiao*
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Journal Title
Nature Physics
Volume: 19, 414-419
Pages: 1-10
DOI
Peer Reviewed / Open Access / Int'l Joint Research
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