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The paper "Observation of non-Hermitian degeneracies in a chaotic acoustic cavity" by Yang, Y., et al. (2021) in Nature Physics reports the experimental observation of exceptional points (EPs) in a chaotic acoustic cavity. These EPs, which are degeneracies in non-Hermitian systems, were observed in a spatially structured optical pump that creates a chaotic exciton-polariton billiard. The study found that varying the billiard's parameters led to the crossing and anti-crossing of energy levels, revealing the unique topological structure of non-Hermitian systems.
Yang， Y. 等人的论文“Observation of non-Hermitian degeneracies in a chaotic acoustic cavity” （2021） 在《自然物理学》上报道了混沌声腔中异常点 （EP） 的实验观察 。 这些 EP 是非厄米特系统中的简并性，是在空间结构的光泵中观察到的，该光泵会产生混沌的激子极化激元台球。 研究发现，改变台球的参数导致了能级的交叉和反交叉，揭示了非厄米特系统独特的拓扑结构。
Yang， Y. 等人的论文“Observation of non-Hermitian degeneracies in a chaotic acoustic cavity” （2021） 在《自然物理学》上报道了混沌声腔中异常点 （EP） 的实验观察 。 这些 EP 是非厄米特系统中的简并性，是在空间结构的光泵中观察到的，该光泵会产生混沌的激子极化激元台球。 研究发现，改变台球的参数导致了能级的交叉和反交叉，揭示了非厄米特系统独特的拓扑结构。
Here's a more detailed breakdown:
以下是更详细的细分：
以下是更详细的细分：
- Non-Hermitian Systems: 非厄米特系统：These are systems where the Hamiltonian (which governs the system's evolution) is not Hermitian, meaning it does not equal its own conjugate transpose. This is often the case in open systems, where energy can be exchanged with the environment.
在这些系统中，哈密顿量（控制系统的演化）不是厄米特量，这意味着它不等于自己的共轭转调。在能源可以与环境交换的开放系统中，情况通常如此。 - Exceptional Points (EPs): 特殊积分 （EP）：EPs are spectral degeneracies in non-Hermitian systems, where two or more eigenvalues and their corresponding eigenvectors coalesce.
EP 是非厄米特系统中的谱简并性，其中两个或多个特征值及其相应的特征向量合并。 - Exciton-Polariton Billiard: 激驰-Polariton 台球：The experiment uses a chaotic cavity filled with exciton-polaritons ( quasiparticles formed by the strong coupling of excitons and photons) and a spatially structured optical pump to create a chaotic system. This allows for the study of non-Hermitian physics in a controlled manner.
该实验使用一个充满激子极化激元（由激子和光子的强耦合形成的准粒子）的混沌腔和一个空间结构的光泵来创建一个混沌系统。这允许以受控方式研究非厄米特物理学。 - Experimental Findings: 实验结果：The researchers observed that varying the parameters of the billiard (like the shape or optical pump) resulted in energy level crossings and anti-crossings, revealing the non-trivial topological modal structure characteristic of non-Hermitian systems.
研究人员观察到，改变台球的参数（如形状或光泵）会导致能级交叉和反交叉，揭示了非厄米特系统的非平凡拓扑模态结构特征。 - Significance: 意义：The observation of EPs in this context is important because it can lead to new phenomena like unidirectional transport, anomalous lasing/absorption, and chiral modes. It also paves the way for studying non-Hermitian quantum dynamics and could lead to new operating principles for polariton-based devices.
在这种情况下对 EP 的观察很重要，因为它会导致单向传输、异常激光/吸收和手性模式等新现象。它还为研究非厄米量子动力学铺平了道路，并可能为基于极化激元的设备带来新的工作原理。
- Observation of non-Hermitian degeneracies in a chaotic exciton- ...
在混沌激子中观察非厄米特简并性 ...However, the inherent non-Hermitian nature of this potential has so far been largely ignored in exciton-polariton physics. Here we...
然而，到目前为止，这种势的固有非厄米特性质在激子极化子物理学中基本上被忽视了。在这里...St Andrews Research Repository
圣安德鲁斯研究存储库
- Observation of non-Hermitian degeneracies in a chaotic exciton- ...
在混沌激子中观察非厄米特简并性 ...Observation of non-Hermitian degeneracies in a chaotic exciton-polariton billiard - NASA/ADS.
在混沌激子极化子台球中观察非厄米特简并 - NASA/ADS。Harvard University 哈佛大学 - Observation of Non-Hermitian Edge Burst Effect in One-Dimensional ...
一维 ...17 May 2024 — Abstract. Non-Hermitian systems can exhibit unique quantum phases without any Hermitian counterparts. For example, the ...
2024 年 5 月 17 日 — 摘要。非厄米系统可以表现出独特的量子相位，而没有任何厄米特对应物。例如，...American Physical Society 美国物理学会
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No results found for yang, y., et al. (2021). "observation of non-hermitian degeneracies in a chaotic acoustic cavity." nature physics.
没有找到 Yang， Y.， et al. （2021） 的结果。“在混沌声腔中观察非厄米特简并性。”自然物理学。
Results for yang, y., et al. (2021). observation of non-hermitian degeneracies in a chaotic acoustic cavity. nature physics (without quotes):没有找到 Yang， Y.， et al. （2021） 的结果。“在混沌声腔中观察非厄米特简并性。”自然物理学。
Yang， Y. 等人 （2021） 的结果。混沌声腔中非厄米特简并性的观察。自然物理学 （不带引号）：
Observation of non-Hermitian degeneracies in a chaotic ...
在混沌 ...
National Institutes of Health (NIH) | (.gov)
https://pubmed.ncbi.nlm.nih.gov › ...
National Institutes of Health (NIH) | (.gov)
https://pubmed.ncbi.nlm.nih.gov › ...
by T Gao2015Cited by 627 — Here we demonstrate that non-Hermiticity dramatically modifies the structure of modes and spectral degeneracies in exciton-polariton systems.
由 T Gao2015 被 627 引用 — 在这里，我们证明了非 Hermiticity 极大地改变了激子-极化子系统中的模式结构和光谱简并性。
由 T Gao2015 被 627 引用 — 在这里，我们证明了非 Hermiticity 极大地改变了激子-极化子系统中的模式结构和光谱简并性。
Missing: yang, et al. (2021). acoustic cavity.
Observation of exceptional point in a PT broken non ...
观察 PT 断裂非 ...
Nature
https://www.nature.com › scientific reports › articles
Nature
https://www.nature.com › scientific reports › articles
by GL Zhang2021Cited by 13 — Here we propose an extendable method to simulate non-Hermitian systems and study EPs with quantum circuits. The system is inherently parity-time (PT) broken.
作者 GL Zhang2021 引用次数 13 — 在这里，我们提出了一种可扩展的方法来模拟非厄米特系统并使用量子电路研究 EP。该系统本质上是奇偶校验时间 （PT） 中断的。
作者 GL Zhang2021 引用次数 13 — 在这里，我们提出了一种可扩展的方法来模拟非厄米特系统并使用量子电路研究 EP。该系统本质上是奇偶校验时间 （PT） 中断的。
Observation of non-Hermitian degeneracies in a chaotic ...
在混沌 ...
ResearchGate
https://www.researchgate.net › publication › 27471523...
ResearchGate
https://www.researchgate.net › publication › 27471523...
22 Oct 2015 — However, the inherent non-Hermitian nature of this potential has so far been largely ignored in exciton-polariton physics. Here we demonstrate ...
2015 年 10 月 22 日 — 然而，到目前为止，这种势能固有的非厄米特性质在激子极化子物理学中基本上被忽视了。在这里，我们演示 ...
2015 年 10 月 22 日 — 然而，到目前为止，这种势能固有的非厄米特性质在激子极化子物理学中基本上被忽视了。在这里，我们演示 ...
Observation of non-Hermitian degeneracies in a chaotic ...
在混沌 ...
St Andrews Research Repository
https://research-repository.st-andrews.ac.uk › Ho...
St Andrews Research Repository
https://research-repository.st-andrews.ac.uk › Ho...
PDF
by T Gao2015Cited by 613 — Generally, exciton-polaritons offer a novel macroscopic quantum platform for studies of non-Hermitian physics and quantum chaos at the confluence of light and ...
由 T Gao2015 引用次数 613 — 通常，激子极化激元为研究非厄米特物理学和光与 ......
由 T Gao2015 引用次数 613 — 通常，激子极化激元为研究非厄米特物理学和光与 ......
Missing: yang, (2021). acoustic
Observation of dynamical degeneracy splitting for the non
非
arXiv
https://arxiv.org › pdf
arXiv
https://arxiv.org › pdf
PDF
by T Wan2023Cited by 5 — In this paper, we report the experimental observation of both phenomena in a two-dimensional acoustic crystal, and reveal their remarkable correspondence by ...
由 T Wan2023 引用次数 5 — 在本文中，我们报告了在二维声学晶体中对这两种现象的实验观察 ，并通过以下方式 揭示了它们非凡的对应关系......
由 T Wan2023 引用次数 5 — 在本文中，我们报告了在二维声学晶体中对这两种现象的实验观察 ，并通过以下方式 揭示了它们非凡的对应关系......
Observation-of-non-Hermitian-degeneracies-in-a-chaotic- ...
混沌中非厄米特简并论的观察 ...
NTT Research
https://ntt-research.com › uploads › 2022/08 › Ob...
NTT Research
https://ntt-research.com › uploads › 2022/08 › Ob...
PDF
by T GaoCited by 626 — The continuously pumped condensate decays releasing coherent photons, which escape the cavity carrying all information about the condensed state. The ...
由 T Gao 引用次数 626 — 连续泵送的凝聚态衰变释放出相干光子，这些光子从腔中逃脱，携带有关凝聚态的所有信息 。这 ...
由 T Gao 引用次数 626 — 连续泵送的凝聚态衰变释放出相干光子，这些光子从腔中逃脱，携带有关凝聚态的所有信息 。这 ...
8 pages 8 页
Missing: (2021). acoustic
Non-Hermitian physics 非厄米特物理学
Taylor & Francis Online
https://www.tandfonline.com › ... › Volume 69, Issue 3
Taylor & Francis Online
https://www.tandfonline.com › ... › Volume 69, Issue 3
by Y Ashida2020Cited by 1679 — Abstract. A review is given on the foundations and applications of non-Hermitian classical and quantum physics.
由 Y Ashida20201679 年引用 — 摘要。对非 Hermitian 经典物理学和量子物理学的基础和应用进行了综述。
由 Y Ashida20201679 年引用 — 摘要。对非 Hermitian 经典物理学和量子物理学的基础和应用进行了综述。
Observation of non-Hermitian degeneracies in a chaotic ...
在混沌 ...
Europe PMC
https://europepmc.org › article › med
Europe PMC
https://europepmc.org › article › med
by T Gao2015Cited by 627 — Importantly, exciton-polaritons are a profoundly open (that is, non-Hermitian) quantum system, which requires constant pumping of energy and continuously decays ...
由 T Gao2015 引用次数 627 — 重要的是，激子极化激元是一个非常开放的（即非厄米特的）量子系统，它需要不断泵送能量并不断衰变 ......
由 T Gao2015 引用次数 627 — 重要的是，激子极化激元是一个非常开放的（即非厄米特的）量子系统，它需要不断泵送能量并不断衰变 ......
Missing: et acoustic
Observation of anti-parity-time-symmetry, phase transitions ...
Nature
https://www.nature.com › ... › articles
Nature
https://www.nature.com › ... › articles
by A Bergman2021Cited by 108 — In this work, anti-parity-time symmetric phase transitions and exceptional point singularities are demonstrated in a single strand of single-mode ...
Observation of Acoustic Non-Hermitian Bloch Braids and ...
American Physical Society
https://link.aps.org › doi › PhysRevLett.130.017201
American Physical Society
https://link.aps.org › doi › PhysRevLett.130.017201
by Q Zhang2023Cited by 123 — We present the first acoustic realization of the topological non-Hermitian Bloch braids, based on a two-band model easily accessible for realizing any desired ...