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Non-Hermitian wave-packet dynamics and its realization within a non-Hermitian chiral cavity
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Weicen Dong1, 2, 3, Qing-Dong Jiang1, 4, 5, *, Matteo Baggioli1, 2, 3, *
Quantum Frontiers | 2026, 4(1) : 39 - 55
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Quantum Frontiers | 2026, 4(1): 39-55
ORIGINAL ARTICLE
Non-Hermitian wave-packet dynamics and its realization within a non-Hermitian chiral cavity
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Weicen Dong1, 2, 3, Qing-Dong Jiang1, 4, 5, *, Matteo Baggioli1, 2, 3, *
Affiliations
  • 1School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
  • 2Wilczek Quantum Center, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
  • 3Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
  • 4Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
  • 5Shanghai Branch, Hefei National Laboratory, Shanghai 201315, China
Published: 2026-03-15 doi: 10.1007/s44214-026-00099-7
Outline
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Topological wave-packet dynamics provide a powerful framework for studying quantum transport in topological materials. However, extending this approach to non-Hermitian quantum systems presents several important challenges, primarily due to ambiguities in defining the Berry phase and the non-unitary evolution of the wave-packets when symmetry is broken. In this work, we adopt the complex Berry phase definition using the bi-orthogonal formalism and derive the semiclassical equations of motion (EOM) for a wave-packet in a non-Hermitian topological system. Interestingly, we find that the complex Berry curvature introduces both an anomalous velocity and a non-Hermitian Hall-like force into the semiclassical EOM. To validate the derived EOM, we design a non-Hermitian Haldane model featuring non-reciprocal next-nearest-neighbor (NNN) hopping, where the imbalance in the NNN hopping amplitudes gives rise to an emergent 'complex chirality'. We reveal that the real and imaginary components of the complex chirality dictate the signs of both the real and imaginary parts of the complex Berry curvature, as well as the direction and dissipation rate of the edge states. Our analytical findings are confirmed by direct numerical simulations of the wave-packet dynamics. Finally, we suggest a potential experimental realization of this complex Haldane model using a non-Hermitian optical chiral cavity, providing a promising platform for testing our theoretical predictions.

Non-Hermitian systems  /  Wave-packet dynamics  /  Topological matter  /  Chiral cavities
Weicen Dong, Qing-Dong Jiang, Matteo Baggioli. Non-Hermitian wave-packet dynamics and its realization within a non-Hermitian chiral cavity[J]. Quantum Frontiers, 2026 , 4 (1) : 39 -55 . DOI: 10.1007/s44214-026-00099-7
  • National Natural Science Foundation of China(22Z990204371; 12374332)
  • Innovation Program for Quantum Science and Technology Grant(2021ZD0301900)
Year 2026 volume 4 Issue 1
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Article Info
doi: 10.1007/s44214-026-00099-7
  • Receive Date:2025-11-07
  • Online Date:2026-08-13
  • Published:2026-03-15
Article Data
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History
  • Received:2025-11-07
  • Revised:2026-02-02
  • Accepted:2026-02-05
Funding
National Natural Science Foundation of China(22Z990204371; 12374332)
Innovation Program for Quantum Science and Technology Grant(2021ZD0301900)
Affiliations
    1School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
    2Wilczek Quantum Center, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
    3Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
    4Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China
    5Shanghai Branch, Hefei National Laboratory, Shanghai 201315, China

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表12种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
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占总种数比例
Percentage of
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种数
Number of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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