Anton M. Graf,Saul Atwood,Mingxuan Xiao,Roland Ketzmerick,Eric J. Heller,Joonas Keski-Rahkonen
A hallmark of classical ergodicity is the complete loss of memory of the initial conditions due to eventual uniform covering of available phase space. In quantum counterparts of such systems, however, this classical ergodic ideal is fundamentally limited: Here, we introduce the concept of a quantum birthmark, a permanent signature left by the initial state and its early-time evolution in a general quantum system, which gives rise to nonergodic behavior persisting even in the infinite-time limit. We present a birthmark framework outlining a ubiquitous memory effect for an arbitrary, nonstationary state composed of two factors conspiring together: the universal and the revival enhancement. The former sets the minimal amplification carried by the time evolution of a quantum state based on global symmetries, whereas the latter incorporates the further enhancement stemming from the early dynamics, particularly prominent in the presence of recurrences that occur before the Heisenberg time. As a concrete example, we identify quantum birthmarks in the venerable stadium billiard, where they can be significantly enhanced by quantum scars. Finally, we discuss the broader implications of quantum birthmarks, including their role as a natural extension of all types of scarring theories to generic nonstationary quantum systems and prospects for experimental observation. Generally, our work opens an unexplored avenue for understanding the elusive quantum nature of ergodicity.
{"title":"Quantum Birthmarks: Ergodicity Breaking Beyond Scarring","authors":"Anton M. Graf,Saul Atwood,Mingxuan Xiao,Roland Ketzmerick,Eric J. Heller,Joonas Keski-Rahkonen","doi":"10.1103/dhzb-28rb","DOIUrl":"https://doi.org/10.1103/dhzb-28rb","url":null,"abstract":"A hallmark of classical ergodicity is the complete loss of memory of the initial conditions due to eventual uniform covering of available phase space. In quantum counterparts of such systems, however, this classical ergodic ideal is fundamentally limited: Here, we introduce the concept of a quantum birthmark, a permanent signature left by the initial state and its early-time evolution in a general quantum system, which gives rise to nonergodic behavior persisting even in the infinite-time limit. We present a birthmark framework outlining a ubiquitous memory effect for an arbitrary, nonstationary state composed of two factors conspiring together: the universal and the revival enhancement. The former sets the minimal amplification carried by the time evolution of a quantum state based on global symmetries, whereas the latter incorporates the further enhancement stemming from the early dynamics, particularly prominent in the presence of recurrences that occur before the Heisenberg time. As a concrete example, we identify quantum birthmarks in the venerable stadium billiard, where they can be significantly enhanced by quantum scars. Finally, we discuss the broader implications of quantum birthmarks, including their role as a natural extension of all types of scarring theories to generic nonstationary quantum systems and prospects for experimental observation. Generally, our work opens an unexplored avenue for understanding the elusive quantum nature of ergodicity.","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":"8 1","pages":""},"PeriodicalIF":12.5,"publicationDate":"2026-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148923407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Breakdown of the Kerr-cat qubit tunneling time induced by auxiliary circuit modes","authors":"Anonymous","doi":"10.1103/z8jm-q289","DOIUrl":"https://doi.org/10.1103/z8jm-q289","url":null,"abstract":"","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":"40 1","pages":""},"PeriodicalIF":12.5,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148923406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nonreciprocal interactions—where forces between entities are asymmetric—govern a wide range of nonequilibrium phenomena, yet their role in structural transitions in living and active systems remains elusive. Here, we demonstrate a transition between nonreciprocal states using starfish embryos at different stages of development, where interactions are inherently asymmetric and tunable. Experiments, interaction inference, and topological analysis yield a nonreciprocal state diagram spanning crystalline, flock-like, and fragmented states, revealing that weak nonreciprocity promotes structural order while stronger asymmetry disrupts it. To capture these transitions, we introduce topological landscapes, mapping the distribution of structural motifs across state space. We further develop topological flowscapes, a dynamic framework that quantifies transitions between collective states and detects an informational rate shift and an emergent proofreading from the experimental state transition. Together, these results establish a general approach for decoding nonequilibrium transitions and uncover how asymmetric interactions sculpt the dynamical and structural architecture of active and living matter.
{"title":"Topological Flowscape Reveals State Transitions in Nonreciprocal Living Matter","authors":"Hyunseok Lee,EliseAnne Koskelo,Shreyas Gokhale,Junang Li,Chenyi Fei,Chih-Wei Joshua Liu,Lisa Lin,Jörn Dunkel,Dominic J. Skinner,Nikta Fakhri","doi":"10.1103/tq6h-f5ws","DOIUrl":"https://doi.org/10.1103/tq6h-f5ws","url":null,"abstract":"Nonreciprocal interactions—where forces between entities are asymmetric—govern a wide range of nonequilibrium phenomena, yet their role in structural transitions in living and active systems remains elusive. Here, we demonstrate a transition between nonreciprocal states using starfish embryos at different stages of development, where interactions are inherently asymmetric and tunable. Experiments, interaction inference, and topological analysis yield a nonreciprocal state diagram spanning crystalline, flock-like, and fragmented states, revealing that weak nonreciprocity promotes structural order while stronger asymmetry disrupts it. To capture these transitions, we introduce topological landscapes, mapping the distribution of structural motifs across state space. We further develop topological flowscapes, a dynamic framework that quantifies transitions between collective states and detects an informational rate shift and an emergent proofreading from the experimental state transition. Together, these results establish a general approach for decoding nonequilibrium transitions and uncover how asymmetric interactions sculpt the dynamical and structural architecture of active and living matter.","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":"12 1","pages":""},"PeriodicalIF":12.5,"publicationDate":"2026-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148923408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Ablikim,M. N. Achasov,P. Adlarson,X. C. Ai,R. Aliberti,A. Amoroso,Q. An,Y. Bai,O. Bakina,Y. Ban,H.-R. Bao,V. Batozskaya,K. Begzsuren,N. Berger,M. Berlowski,M. Bertani,D. Bettoni,F. Bianchi,E. Bianco,A. Bortone,I. Boyko,R. A. Briere,A. Brueggemann,H. Cai,M. H. Cai,X. Cai,A. Calcaterra,G. F. Cao,N. Cao,S. A. Cetin,X. Y. Chai,J. F. Chang,G. R. Che,Y. Z. Che,C. H. Chen,Chao Chen,G. Chen,H. S. Chen,H. Y. Chen,M. L. Chen,S. J. Chen,S. L. Chen,S. M. Chen,T. Chen,X. R. Chen,X. T. Chen,X. Y. Chen,Y. B. Chen,Y. Q. Chen,Y. Q. Chen,Z. Chen,Z. J. Chen,Z. K. Chen,S. K. Choi,X. Chu,G. Cibinetto,F. Cossio,J. Cottee-Meldrum,J. J. Cui,H. L. Dai,J. P. Dai,A. Dbeyssi,R. E. de Boer,D. Dedovich,C. Q. Deng,Z. Y. Deng,A. Denig,I. Denysenko,M. Destefanis,F. De Mori,B. Ding,X. X. Ding,Y. Ding,Y. Ding,Y. X. Ding,J. Dong,L. Y. Dong,M. Y. Dong,X. Dong,M. C. Du,S. X. Du,S. X. Du,Y. Y. Duan,P. Egorov,G. F. Fan,J. J. Fan,Y. H. Fan,J. Fang,J. Fang,S. S. Fang,W. X. Fang,Y. Q. Fang,R. Farinelli,L. Fava,F. Feldbauer,G. Felici,C. Q. Feng,J. H. Feng,L. Feng,Q. X. Feng,Y. T. Feng,M. Fritsch,C. D. Fu,J. L. Fu,Y. W. Fu,H. Gao,X. B. Gao,Y. Gao,Y. N. Gao,Y. N. Gao,Y. Y. Gao,S. Garbolino,I. Garzia,L. Ge,P. T. Ge,Z. W. Ge,C. Geng,E. M. Gersabeck,A. Gilman,K. Goetzen,J. D. Gong,L. Gong,W. X. Gong,W. Gradl,S. Gramigna,M. Greco,M. H. Gu,Y. T. Gu,C. Y. Guan,A. Q. Guo,L. B. Guo,M. J. Guo,R. P. Guo,Y. P. Guo,A. Guskov,J. Gutierrez,K. L. Han,T. T. Han,F. Hanisch,K. D. Hao,X. Q. Hao,F. A. Harris,K. K. He,K. L. He,F. H. Heinsius,C. H. Heinz,Y. K. Heng,C. Herold,P. C. Hong,G. Y. Hou,X. T. Hou,Y. R. Hou,Z. L. Hou,H. M. Hu,J. F. Hu,Q. P. Hu,S. L. Hu,T. Hu,Y. Hu,Z. M. Hu,G. S. Huang,K. X. Huang,L. Q. Huang,P. Huang,X. T. Huang,Y. P. Huang,Y. S. Huang,T. Hussain,N. Hüsken,N. in der Wiesche,J. Jackson,Q. Ji,Q. P. Ji,W. Ji,X. B. Ji,X. L. Ji,Y. Y. Ji,Z. K. Jia,D. Jiang,H. B. Jiang,P. C. Jiang,S. J. Jiang,T. J. Jiang,X. S. Jiang,Y. Jiang,J. B. Jiao,J. K. Jiao,Z. Jiao,S. Jin,Y. Jin,M. Q. Jing,X. M. Jing,T. Johansson,S. Kabana,N. Kalantar-Nayestanaki,X. L. Kang,X. S. Kang,M. Kavatsyuk,B. C. Ke,V. Khachatryan,A. Khoukaz,R. Kiuchi,O. B. Kolcu,B. Kopf,M. Kuessner,X. Kui,N. Kumar,A. Kupsc,W. Kühn,Q. Lan,W. N. Lan,T. T. Lei,M. Lellmann,T. Lenz,C. Li,C. Li,C. H. Li,C. K. Li,D. M. Li,F. Li,G. Li,H. B. Li,H. J. Li,H. N. Li,Hui Li,J. R. Li,J. S. Li,K. Li,K. L. Li,K. L. Li,L. J. Li,Lei Li,M. H. Li,M. R. Li,P. L. Li,P. R. Li,Q. M. Li,Q. X. Li,R. Li,S. X. Li,T. Li,T. Y. Li,W. D. Li,W. G. Li,X. Li,X. H. Li,X. L. Li,X. Y. Li,X. Z. Li,Y. Li,Y. G. Li,Y. P. Li,Z. J. Li,Z. Y. Li,H. Liang,Y. F. Liang,Y. T. Liang,G. R. Liao,L. B. Liao,M. H. Liao,Y. P. Liao,J. Libby,A. Limphirat,C. C. Lin,D. X. Lin,L. Q. Lin,T. Lin,B. J. Liu,B. X. Liu,C. Liu,C. X. Liu,F. Liu,F. H. Liu,Feng Liu,G. M. Liu,H. Liu,H. B. Liu,H. H. Liu,H. M. Liu,Huihui Liu,J. B. Liu,J. J. Liu,K. Liu,K. Liu,K. Y. Liu,Ke Liu,L. C. Liu,Lu Liu,M. H. Liu,P. L. Liu,Q. Liu,S. B. Liu,T. Liu,W. K. Liu,W. M. Liu,W. T. Liu,X. Liu,X. Liu,X. K. Liu,X. L. Liu,X. Y. Liu,Y. Liu,Y. Liu,Yuan Liu,Y. B. Liu,Z. A. Liu,Z. D. Liu,Z. Q. Liu,X. C. Lou,F. X. Lu,H. J. Lu,J. G. Lu,X. L. Lu,Y. Lu,Y. H. Lu,Y. P. Lu,Z. H. Lu,C. L. Luo,J. R. Luo,J. S. Luo,M. X. Luo,T. Luo,X. L. Luo,Z. Y. Lv,X. R. Lyu,Y. F. Lyu,Y. H. Lyu,F. C. Ma,H. L. Ma,J. L. Ma,L. L. Ma,L. R. Ma,Q. M. Ma,R. Q. Ma,R. Y. Ma,T. Ma,X. T. Ma,X. Y. Ma,Y. M. Ma,F. E. Maas,I. MacKay,M. Maggiora,S. Malde,Q. A. Malik,H. X. Mao,Y. J. Mao,Z. P. Mao,S. Marcello,A. Marshall,F. M. Melendi,Y. H. Meng,Z. X. Meng,G. Mezzadri,H. Miao,T. J. Min,R. E. Mitchell,X. H. Mo,B. Moses,N. Yu. Muchnoi,J. Muskalla,Y. Nefedov,F. Nerling,L. S. Nie,I. B. Nikolaev,Z. Ning,S. Nisar,Q. L. Niu,W. D. Niu,C. Normand,S. L. Olsen,Q. Ouyang,S. Pacetti,X. Pan,Y. Pan,A. Pathak,Y. P. Pei,M. Pelizaeus,H. P. Peng,X. J. Peng,Y. Y. Peng,K. Peters,K. Petridis,J. L. Ping,R. G. Ping,S. Plura,V. Prasad,F. Z. Qi,H. R. Qi,M. Qi,S. Qian,W. B. Qian,C. F. Qiao,J. H. Qiao,J. J. Qin,J. L. Qin,L. Q. Qin,L. Y. Qin,P. B. Qin,X. P. Qin,X. S. Qin,Z. H. Qin,J. F. Qiu,Z. H. Qu,J. Rademacker,C. F. Redmer,A. Rivetti,M. Rolo,G. Rong,S. S. Rong,F. Rosini,Ch. Rosner,M. Q. Ruan,N. Salone,A. Sarantsev,Y. Schelhaas,K. Schoenning,M. Scodeggio,K. Y. Shan,W. Shan,X. Y. Shan,Z. J. Shang,J. F. Shangguan,L. G. Shao,M. Shao,C. P. Shen,H. F. Shen,W. H. Shen,X. Y. Shen,B. A. Shi,H. Shi,J. L. Shi,J. Y. Shi,S. Y. Shi,X. Shi,H. L. Song,J. J. Song,T. Z. Song,W. M. Song,Y. J. Song,Y. X. Song,S. Sosio,S. Spataro,F. Stieler,S. S. Su,Y. J. Su,G. B. Sun,G. X. Sun,H. Sun,H. K. Sun,J. F. Sun,K. Sun,L. Sun,S. S. Sun,T. Sun,Y. C. Sun,Y. H. Sun,Y. J. Sun,Y. Z. Sun,Z. Q. Sun,Z. T. Sun,C. J. Tang,G. Y. Tang,J. Tang,J. J. Tang,L. F. Tang,Y. A. Tang,L. Y. Tao,M. Tat,J. X. Teng,J. Y. Tian,W. H. Tian,Y. Tian,Z. F. Tian,I. Uman,B. Wang,B. Wang,Bo Wang,C. Wang,C. Wang,Cong Wang,D. Y. Wang,H. J. Wang,J. J. Wang,K. Wang,L. L. Wang,L. W. Wang,M. Wang,M. Wang,N. Y. Wang,S. Wang,T. Wang,T. J. Wang,W. Wang,Wei Wang,W. P. Wang,X. Wang,X. F. Wang,X. J. Wang,X. L. Wang,X. N. Wang,Y. Wang,Y. D. Wang,Y. F. Wang,Y. H. Wang,Y. J. Wang,Y. L. Wang,Y. N. Wang,Y. Q. Wang,Yaqian Wang,Yi Wang,Yuan Wang,Z. Wang,Z. L. Wang,Z. L. Wang,Z. Q. Wang,Z. Y. Wang,D. H. Wei,H. R. Wei,F. Weidner,S. P. Wen,Y. R. Wen,U. Wiedner,G. Wilkinson,M. Wolke,C. Wu,J. F. Wu,L. H. Wu,L. J. Wu,L. J. Wu,Lianjie Wu,S. G. Wu,S. M. Wu,X. Wu,X. H. Wu,Y. J. Wu,Z. Wu,L. Xia,X. M. Xian,B. H. Xiang,D. Xiao,G. Y. Xiao,H. Xiao,Y. L. Xiao,Z. J. Xiao,C. Xie,K. J. Xie,X. H. Xie,Y. Xie,Y. G. Xie,Y. H. Xie,Z. P. Xie,T. Y. Xing,C. F. Xu,C. J. Xu,G. F. Xu,H. Y. Xu,H. Y. Xu,M. Xu,Q. J. Xu,Q. N. Xu,T. D. Xu,W. Xu,W. L. Xu,X. P. Xu,Y. Xu,Y. Xu,Y. C. Xu,Z. S. Xu,F. Yan,H. Y. Yan,L. Yan,W. B. Yan,W. C. Yan,W. H. Yan,W. P. Yan,X. Q. Yan,H. J. Yang,H. L. Yang,H. X. Yang,J. H. Yang,R. J. Yang,T. Yang,Y. Yang,Y. F. Yang,Y. H. Yang,Y. Q. Yang,Y. X. Yang,Y. Z. Yang,M. Ye,M. H. Ye,Z. J. Ye,Junhao Yin,Z. Y. You,B. X. Yu,C. X. Yu,G. Yu,J. S. Yu,L. Q. Yu,M. C. Yu,T. Yu,X. D. Yu,Y. C. Yu,C. Z. Yuan,H. Yuan,J. Yuan,J. Yuan,L. Yuan,S. C. Yuan,X. Q. Yuan,Y. Yuan,Z. Y. Yuan,C. X. Yue,Ying Yue,A. A. Zafar,S. H. Zeng,X. Zeng,Y. Zeng,Yujie Zeng,Y. J. Zeng,X. Y. Zhai,Y. H. Zhan,Shunan Zhang,A. Q. Zhang,B. L. Zhang,B. X. Zhang,D. H. Zhang,G. Y. Zhang,G. Y. Zhang,H. Zhang,H. Zhang,H. C. Zhang,H. H. Zhang,H. Q. Zhang,H. R. Zhang,H. Y. Zhang,Jin Zhang,J. Zhang,J. J. Zhang,J. L. Zhang,J. Q. Zhang,J. S. Zhang,J. W. Zhang,J. X. Zhang,J. Y. Zhang,J. Z. Zhang,Jianyu Zhang,L. M. Zhang,Lei Zhang,N. Zhang,P. Zhang,Q. Zhang,Q. Y. Zhang,R. Y. Zhang,S. H. Zhang,Shulei Zhang,X. M. Zhang,X. Y. Zhang,X. Y. Zhang,Y. Zhang,Y. Zhang,Y. T. Zhang,Y. H. Zhang,Y. M. Zhang,Y. P. Zhang,Z. D. Zhang,Z. H. Zhang,Z. L. Zhang,Z. L. Zhang,Z. X. Zhang,Z. Y. Zhang,Z. Y. Zhang,Z. Z. Zhang,Zh. Zh. Zhang,G. Zhao,J. Y. Zhao,J. Z. Zhao,L. Zhao,L. Zhao,M. G. Zhao,N. Zhao,R. P. Zhao,S. J. Zhao,Y. B. Zhao,Y. L. Zhao,Y. X. Zhao,Z. G. Zhao,A. Zhemchugov,B. Zheng,B. M. Zheng,J. P. Zheng,W. J. Zheng,X. R. Zheng,Y. H. Zheng,B. Zhong,C. Zhong,H. Zhou,J. Q. Zhou,J. Y. Zhou,S. Zhou,X. Zhou,X. K. Zhou,X. R. Zhou,X. Y. Zhou,Y. X. Zhou,Y. Z. Zhou,A. N. Zhu,J. Zhu,K. Zhu,K. J. Zhu,K. S. Zhu,L. Zhu,L. X. Zhu,S. H. Zhu,T. J. Zhu,W. D. Zhu,W. D. Zhu,W. J. Zhu,W. Z. Zhu,Y. C. Zhu,Z. A. Zhu,X. Y. Zhuang,J. H. Zou,J. Zu,BESIII Collaboration
The study of the charmed baryons is crucial for investigating the strong and weak interactions in the standard model and for gaining insights into the internal structure of baryons. In an e + e − experiment, the lightest charmed baryon, Λ c + , can be produced in pairs through the single-photon annihilation process. This process can be described by two complex electromagnetic form factors. The presence of a nonzero relative phase between these form factors gives rise to a transverse polarization of the charmed baryon and provides additional constraints on the dynamic parameters in the decays. In this article, we present the first observation of the transverse polarization of Λ c + in the reaction e + e − → Λ c + Λ ¯ c − , based on 6.4 fb − 1 of e + e − annihilation data collected at center-of-mass energies between 4600 MeV and 4951 MeV with the BESIII detector. The decay asymmetry parameters in the decays Λ c + → p K S 0 , Λ π + , Σ 0 π + , and Σ + π 0 are simultaneously extracted from the joint angular distributions. By independently extracting the above parameters for the process and its C P -conjugate counterpart, we derive both the strong and weak phase differences between different partial waves and test several C P observables. The obtained results fully demonstrate the feasibility of exploiting transverse polarization at electron-positron colliders to search for C P -violating effects, opening up a new avenue for exploring C P violation in the charmed baryon sector.
对粲重子的研究对于研究标准模型中的强相互作用和弱相互作用以及深入了解重子的内部结构至关重要。在e + e−实验中，最轻的粲重子Λ c +可以通过单光子湮灭过程成对产生。这个过程可以用两个复杂的电磁形状因子来描述。这些形状因子之间的非零相对相位的存在导致了粲重子的横向极化，并对衰变中的动态参数提供了额外的约束。在本文中，我们首次观察到反应e + e−→Λ c + Λ¯c−中Λ c +的横向极化，基于BESIII探测器在质量中心能量为4600 MeV和4951 MeV之间收集的e + e−湮灭数据的6.4 fb−1。同时从关节角分布中提取了Λ c +→p K S 0、Λ π +、Σ 0 π +和Σ + π 0的衰变不对称参数。通过独立提取上述过程及其cp共轭对应物的参数，我们推导出不同部分波之间的强弱相位差，并测试了几个cp观测值。所得结果充分证明了利用电子-正电子对撞机的横向极化来寻找C - P违反效应的可行性，为探索粲重子扇区的C - P违反开辟了一条新的途径。
{"title":"Production and Decay Dynamics of the Charmed Baryon\u0000 \u0000 \u0000 Λ\u0000 c\u0000 +\u0000 \u0000 \u0000 in\u0000 \u0000 \u0000 e\u0000 +\u0000 \u0000 \u0000 e\u0000 −\u0000 \u0000 \u0000 Annihilations near Threshold","authors":"M. Ablikim,M. N. Achasov,P. Adlarson,X. C. Ai,R. Aliberti,A. Amoroso,Q. An,Y. Bai,O. Bakina,Y. Ban,H.-R. Bao,V. Batozskaya,K. Begzsuren,N. Berger,M. Berlowski,M. Bertani,D. Bettoni,F. Bianchi,E. Bianco,A. Bortone,I. Boyko,R. A. Briere,A. Brueggemann,H. Cai,M. H. Cai,X. Cai,A. Calcaterra,G. F. Cao,N. Cao,S. A. Cetin,X. Y. Chai,J. F. Chang,G. R. Che,Y. Z. Che,C. H. Chen,Chao Chen,G. Chen,H. S. Chen,H. Y. Chen,M. L. Chen,S. J. Chen,S. L. Chen,S. M. Chen,T. Chen,X. R. Chen,X. T. Chen,X. Y. Chen,Y. B. Chen,Y. Q. Chen,Y. Q. Chen,Z. Chen,Z. J. Chen,Z. K. Chen,S. K. Choi,X. Chu,G. Cibinetto,F. Cossio,J. Cottee-Meldrum,J. J. Cui,H. L. Dai,J. P. Dai,A. Dbeyssi,R. E. de Boer,D. Dedovich,C. Q. Deng,Z. Y. Deng,A. Denig,I. Denysenko,M. Destefanis,F. De Mori,B. Ding,X. X. Ding,Y. Ding,Y. Ding,Y. X. Ding,J. Dong,L. Y. Dong,M. Y. Dong,X. Dong,M. C. Du,S. X. Du,S. X. Du,Y. Y. Duan,P. Egorov,G. F. Fan,J. J. Fan,Y. H. Fan,J. Fang,J. Fang,S. S. Fang,W. X. Fang,Y. Q. Fang,R. Farinelli,L. Fava,F. Feldbauer,G. Felici,C. Q. Feng,J. H. Feng,L. Feng,Q. X. Feng,Y. T. Feng,M. Fritsch,C. D. Fu,J. L. Fu,Y. W. Fu,H. Gao,X. B. Gao,Y. Gao,Y. N. Gao,Y. N. Gao,Y. Y. Gao,S. Garbolino,I. Garzia,L. Ge,P. T. Ge,Z. W. Ge,C. Geng,E. M. Gersabeck,A. Gilman,K. Goetzen,J. D. Gong,L. Gong,W. X. Gong,W. Gradl,S. Gramigna,M. Greco,M. H. Gu,Y. T. Gu,C. Y. Guan,A. Q. Guo,L. B. Guo,M. J. Guo,R. P. Guo,Y. P. Guo,A. Guskov,J. Gutierrez,K. L. Han,T. T. Han,F. Hanisch,K. D. Hao,X. Q. Hao,F. A. Harris,K. K. He,K. L. He,F. H. Heinsius,C. H. Heinz,Y. K. Heng,C. Herold,P. C. Hong,G. Y. Hou,X. T. Hou,Y. R. Hou,Z. L. Hou,H. M. Hu,J. F. Hu,Q. P. Hu,S. L. Hu,T. Hu,Y. Hu,Z. M. Hu,G. S. Huang,K. X. Huang,L. Q. Huang,P. Huang,X. T. Huang,Y. P. Huang,Y. S. Huang,T. Hussain,N. Hüsken,N. in der Wiesche,J. Jackson,Q. Ji,Q. P. Ji,W. Ji,X. B. Ji,X. L. Ji,Y. Y. Ji,Z. K. Jia,D. Jiang,H. B. Jiang,P. C. Jiang,S. J. Jiang,T. J. Jiang,X. S. Jiang,Y. Jiang,J. B. Jiao,J. K. Jiao,Z. Jiao,S. Jin,Y. Jin,M. Q. Jing,X. M. Jing,T. Johansson,S. Kabana,N. Kalantar-Nayestanaki,X. L. Kang,X. S. Kang,M. Kavatsyuk,B. C. Ke,V. Khachatryan,A. Khoukaz,R. Kiuchi,O. B. Kolcu,B. Kopf,M. Kuessner,X. Kui,N. Kumar,A. Kupsc,W. Kühn,Q. Lan,W. N. Lan,T. T. Lei,M. Lellmann,T. Lenz,C. Li,C. Li,C. H. Li,C. K. Li,D. M. Li,F. Li,G. Li,H. B. Li,H. J. Li,H. N. Li,Hui Li,J. R. Li,J. S. Li,K. Li,K. L. Li,K. L. Li,L. J. Li,Lei Li,M. H. Li,M. R. Li,P. L. Li,P. R. Li,Q. M. Li,Q. X. Li,R. Li,S. X. Li,T. Li,T. Y. Li,W. D. Li,W. G. Li,X. Li,X. H. Li,X. L. Li,X. Y. Li,X. Z. Li,Y. Li,Y. G. Li,Y. P. Li,Z. J. Li,Z. Y. Li,H. Liang,Y. F. Liang,Y. T. Liang,G. R. Liao,L. B. Liao,M. H. Liao,Y. P. Liao,J. Libby,A. Limphirat,C. C. Lin,D. X. Lin,L. Q. Lin,T. Lin,B. J. Liu,B. X. Liu,C. Liu,C. X. Liu,F. Liu,F. H. Liu,Feng Liu,G. M. Liu,H. Liu,H. B. Liu,H. H. Liu,H. M. Liu,Huihui Liu,J. B. Liu,J. J. Liu,K. Liu,K. Liu,K. Y. Liu,Ke Liu,L. C. Liu,Lu Liu,M. H. Liu,P. L. Liu,Q. Liu,S. B. Liu,T. Liu,W. K. Liu,W. M. Liu,W. T. Liu,X. Liu,X. Liu,X. K. Liu,X. L. Liu,X. Y. Liu,Y. Liu,Y. Liu,Yuan Liu,Y. B. Liu,Z. A. Liu,Z. D. Liu,Z. Q. Liu,X. C. Lou,F. X. Lu,H. J. Lu,J. G. Lu,X. L. Lu,Y. Lu,Y. H. Lu,Y. P. Lu,Z. H. Lu,C. L. Luo,J. R. Luo,J. S. Luo,M. X. Luo,T. Luo,X. L. Luo,Z. Y. Lv,X. R. Lyu,Y. F. Lyu,Y. H. Lyu,F. C. Ma,H. L. Ma,J. L. Ma,L. L. Ma,L. R. Ma,Q. M. Ma,R. Q. Ma,R. Y. Ma,T. Ma,X. T. Ma,X. Y. Ma,Y. M. Ma,F. E. Maas,I. MacKay,M. Maggiora,S. Malde,Q. A. Malik,H. X. Mao,Y. J. Mao,Z. P. Mao,S. Marcello,A. Marshall,F. M. Melendi,Y. H. Meng,Z. X. Meng,G. Mezzadri,H. Miao,T. J. Min,R. E. Mitchell,X. H. Mo,B. Moses,N. Yu. Muchnoi,J. Muskalla,Y. Nefedov,F. Nerling,L. S. Nie,I. B. Nikolaev,Z. Ning,S. Nisar,Q. L. Niu,W. D. Niu,C. Normand,S. L. Olsen,Q. Ouyang,S. Pacetti,X. Pan,Y. Pan,A. Pathak,Y. P. Pei,M. Pelizaeus,H. P. Peng,X. J. Peng,Y. Y. Peng,K. Peters,K. Petridis,J. L. Ping,R. G. Ping,S. Plura,V. Prasad,F. Z. Qi,H. R. Qi,M. Qi,S. Qian,W. B. Qian,C. F. Qiao,J. H. Qiao,J. J. Qin,J. L. Qin,L. Q. Qin,L. Y. Qin,P. B. Qin,X. P. Qin,X. S. Qin,Z. H. Qin,J. F. Qiu,Z. H. Qu,J. Rademacker,C. F. Redmer,A. Rivetti,M. Rolo,G. Rong,S. S. Rong,F. Rosini,Ch. Rosner,M. Q. Ruan,N. Salone,A. Sarantsev,Y. Schelhaas,K. Schoenning,M. Scodeggio,K. Y. Shan,W. Shan,X. Y. Shan,Z. J. Shang,J. F. Shangguan,L. G. Shao,M. Shao,C. P. Shen,H. F. Shen,W. H. Shen,X. Y. Shen,B. A. Shi,H. Shi,J. L. Shi,J. Y. Shi,S. Y. Shi,X. Shi,H. L. Song,J. J. Song,T. Z. Song,W. M. Song,Y. J. Song,Y. X. Song,S. Sosio,S. Spataro,F. Stieler,S. S. Su,Y. J. Su,G. B. Sun,G. X. Sun,H. Sun,H. K. Sun,J. F. Sun,K. Sun,L. Sun,S. S. Sun,T. Sun,Y. C. Sun,Y. H. Sun,Y. J. Sun,Y. Z. Sun,Z. Q. Sun,Z. T. Sun,C. J. Tang,G. Y. Tang,J. Tang,J. J. Tang,L. F. Tang,Y. A. Tang,L. Y. Tao,M. Tat,J. X. Teng,J. Y. Tian,W. H. Tian,Y. Tian,Z. F. Tian,I. Uman,B. Wang,B. Wang,Bo Wang,C. Wang,C. Wang,Cong Wang,D. Y. Wang,H. J. Wang,J. J. Wang,K. Wang,L. L. Wang,L. W. Wang,M. Wang,M. Wang,N. Y. Wang,S. Wang,T. Wang,T. J. Wang,W. Wang,Wei Wang,W. P. Wang,X. Wang,X. F. Wang,X. J. Wang,X. L. Wang,X. N. Wang,Y. Wang,Y. D. Wang,Y. F. Wang,Y. H. Wang,Y. J. Wang,Y. L. Wang,Y. N. Wang,Y. Q. Wang,Yaqian Wang,Yi Wang,Yuan Wang,Z. Wang,Z. L. Wang,Z. L. Wang,Z. Q. Wang,Z. Y. Wang,D. H. Wei,H. R. Wei,F. Weidner,S. P. Wen,Y. R. Wen,U. Wiedner,G. Wilkinson,M. Wolke,C. Wu,J. F. Wu,L. H. Wu,L. J. Wu,L. J. Wu,Lianjie Wu,S. G. Wu,S. M. Wu,X. Wu,X. H. Wu,Y. J. Wu,Z. Wu,L. Xia,X. M. Xian,B. H. Xiang,D. Xiao,G. Y. Xiao,H. Xiao,Y. L. Xiao,Z. J. Xiao,C. Xie,K. J. Xie,X. H. Xie,Y. Xie,Y. G. Xie,Y. H. Xie,Z. P. Xie,T. Y. Xing,C. F. Xu,C. J. Xu,G. F. Xu,H. Y. Xu,H. Y. Xu,M. Xu,Q. J. Xu,Q. N. Xu,T. D. Xu,W. Xu,W. L. Xu,X. P. Xu,Y. Xu,Y. Xu,Y. C. Xu,Z. S. Xu,F. Yan,H. Y. Yan,L. Yan,W. B. Yan,W. C. Yan,W. H. Yan,W. P. Yan,X. Q. Yan,H. J. Yang,H. L. Yang,H. X. Yang,J. H. Yang,R. J. Yang,T. Yang,Y. Yang,Y. F. Yang,Y. H. Yang,Y. Q. Yang,Y. X. Yang,Y. Z. Yang,M. Ye,M. H. Ye,Z. J. Ye,Junhao Yin,Z. Y. You,B. X. Yu,C. X. Yu,G. Yu,J. S. Yu,L. Q. Yu,M. C. Yu,T. Yu,X. D. Yu,Y. C. Yu,C. Z. Yuan,H. Yuan,J. Yuan,J. Yuan,L. Yuan,S. C. Yuan,X. Q. Yuan,Y. Yuan,Z. Y. Yuan,C. X. Yue,Ying Yue,A. A. Zafar,S. H. Zeng,X. Zeng,Y. Zeng,Yujie Zeng,Y. J. Zeng,X. Y. Zhai,Y. H. Zhan,Shunan Zhang,A. Q. Zhang,B. L. Zhang,B. X. Zhang,D. H. Zhang,G. Y. Zhang,G. Y. Zhang,H. Zhang,H. Zhang,H. C. Zhang,H. H. Zhang,H. Q. Zhang,H. R. Zhang,H. Y. Zhang,Jin Zhang,J. Zhang,J. J. Zhang,J. L. Zhang,J. Q. Zhang,J. S. Zhang,J. W. Zhang,J. X. Zhang,J. Y. Zhang,J. Z. Zhang,Jianyu Zhang,L. M. Zhang,Lei Zhang,N. Zhang,P. Zhang,Q. Zhang,Q. Y. Zhang,R. Y. Zhang,S. H. Zhang,Shulei Zhang,X. M. Zhang,X. Y. Zhang,X. Y. Zhang,Y. Zhang,Y. Zhang,Y. T. Zhang,Y. H. Zhang,Y. M. Zhang,Y. P. Zhang,Z. D. Zhang,Z. H. Zhang,Z. L. Zhang,Z. L. Zhang,Z. X. Zhang,Z. Y. Zhang,Z. Y. Zhang,Z. Z. Zhang,Zh. Zh. Zhang,G. Zhao,J. Y. Zhao,J. Z. Zhao,L. Zhao,L. Zhao,M. G. Zhao,N. Zhao,R. P. Zhao,S. J. Zhao,Y. B. Zhao,Y. L. Zhao,Y. X. Zhao,Z. G. Zhao,A. Zhemchugov,B. Zheng,B. M. Zheng,J. P. Zheng,W. J. Zheng,X. R. Zheng,Y. H. Zheng,B. Zhong,C. Zhong,H. Zhou,J. Q. Zhou,J. Y. Zhou,S. Zhou,X. Zhou,X. K. Zhou,X. R. Zhou,X. Y. Zhou,Y. X. Zhou,Y. Z. Zhou,A. N. Zhu,J. Zhu,K. Zhu,K. J. Zhu,K. S. Zhu,L. Zhu,L. X. Zhu,S. H. Zhu,T. J. Zhu,W. D. Zhu,W. D. Zhu,W. J. Zhu,W. Z. Zhu,Y. C. Zhu,Z. A. Zhu,X. Y. Zhuang,J. H. Zou,J. Zu,BESIII Collaboration","doi":"10.1103/5v2c-55m1","DOIUrl":"https://doi.org/10.1103/5v2c-55m1","url":null,"abstract":"The study of the charmed baryons is crucial for investigating the strong and weak interactions in the standard model and for gaining insights into the internal structure of baryons. In an e + e − experiment, the lightest charmed baryon, Λ c + , can be produced in pairs through the single-photon annihilation process. This process can be described by two complex electromagnetic form factors. The presence of a nonzero relative phase between these form factors gives rise to a transverse polarization of the charmed baryon and provides additional constraints on the dynamic parameters in the decays. In this article, we present the first observation of the transverse polarization of Λ c + in the reaction e + e − → Λ c + Λ ¯ c − , based on 6.4 fb − 1 of e + e − annihilation data collected at center-of-mass energies between 4600 MeV and 4951 MeV with the BESIII detector. The decay asymmetry parameters in the decays Λ c + → p K S 0 , Λ π + , Σ 0 π + , and Σ + π 0 are simultaneously extracted from the joint angular distributions. By independently extracting the above parameters for the process and its C P -conjugate counterpart, we derive both the strong and weak phase differences between different partial waves and test several C P observables. The obtained results fully demonstrate the feasibility of exploiting transverse polarization at electron-positron colliders to search for C P -violating effects, opening up a new avenue for exploring C P violation in the charmed baryon sector.","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":"141 1","pages":""},"PeriodicalIF":12.5,"publicationDate":"2026-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Spin-orbitronics harnesses spin-orbit coupling to generate pure spin currents for energy-efficient information processing, particularly through the spin-orbit torque (SOT) that drives magnetization switching. However, achieving efficient SOT switching of perpendicular magnetization, which is crucial for high-density applications, remains challenging due to the difficulty in generating spin currents with both high conductivity and out-of-plane polarization in conventional, industry-compatible spin sources, such as heavy metals. Here, we overcome this limitation by demonstrating a noncollinear spin-orbit filtering effect at the surface termination of conventional spin sources. This effect selectively transmits electrons based on the relative alignment between their spin vectors and the interfacial Rashba-Edelstein field. By implementing this strategy in platinum (Pt) epitaxial films with ( n 10 ) orientations ( n = 2 – 4 ), we achieve exceptionally strong z -polarized spin currents. The resulting out-of-plane spin Hall conductivity reaches a record value of 0.75 × 10 5 ( ħ / 2 e ) Ω − 1 m − 1 , surpassing all previous approaches, and enables robust field-free switching of perpendicular magnetization. Notably, the field-free switching is precisely controlled by engineering the crystal point group symmetry from C 1 v to C 4 v . Our work establishes a general framework for transforming conventional high-symmetry materials into out-of-plane spin sources, paving the way for highly efficient and scalable spintronic memory technology.
{"title":"Ultrastrong Unconventional Spin Current via Noncollinear Spin-Orbit Filtering","authors":"Hongliang Chen,Zi-An Wang,Xingguo Gao,Hang Zhou,Jiaxin Chen,Chang Pan,Lizhu Ren,Qia Shen,Zhenyi Zheng,Dandan Guan,Xiaoxue Liu,Shiyong Wang,Yaoyi Li,Hao Zheng,Canhua Liu,Yumeng Yang,Xuepeng Qiu,Guowei Zhou,Jingsheng Chen,Jinfeng Jia,Ding-Fu Shao,Liang Liu","doi":"10.1103/gzp7-1nvx","DOIUrl":"https://doi.org/10.1103/gzp7-1nvx","url":null,"abstract":"Spin-orbitronics harnesses spin-orbit coupling to generate pure spin currents for energy-efficient information processing, particularly through the spin-orbit torque (SOT) that drives magnetization switching. However, achieving efficient SOT switching of perpendicular magnetization, which is crucial for high-density applications, remains challenging due to the difficulty in generating spin currents with both high conductivity and out-of-plane polarization in conventional, industry-compatible spin sources, such as heavy metals. Here, we overcome this limitation by demonstrating a noncollinear spin-orbit filtering effect at the surface termination of conventional spin sources. This effect selectively transmits electrons based on the relative alignment between their spin vectors and the interfacial Rashba-Edelstein field. By implementing this strategy in platinum (Pt) epitaxial films with ( n 10 ) orientations ( n = 2 – 4 ), we achieve exceptionally strong z -polarized spin currents. The resulting out-of-plane spin Hall conductivity reaches a record value of 0.75 × 10 5 ( ħ / 2 e ) Ω − 1 m − 1 , surpassing all previous approaches, and enables robust field-free switching of perpendicular magnetization. Notably, the field-free switching is precisely controlled by engineering the crystal point group symmetry from C 1 v to C 4 v . Our work establishes a general framework for transforming conventional high-symmetry materials into out-of-plane spin sources, paving the way for highly efficient and scalable spintronic memory technology.","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":"13 1","pages":""},"PeriodicalIF":12.5,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Systematic magnetic structure generation based on oriented spin space groups: Formulation, applications, and high-throughput first-principles calculations","authors":"Anonymous","doi":"10.1103/8n3w-h2t1","DOIUrl":"https://doi.org/10.1103/8n3w-h2t1","url":null,"abstract":"","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":"59 1","pages":""},"PeriodicalIF":12.5,"publicationDate":"2026-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Variational Monte Carlo (VMC) is a powerful and fast-growing method for optimizing and evolving parametrized many-body wave functions, especially with modern neural-network quantum states. In practice, however, the stochastic estimators that form the backbone of the method can become unstable or biased due to the presence of nodes, a ubiquitous feature of quantum wave functions. In the continuum, this results in heavy-tailed estimators with potentially divergent variances, while in discrete Hilbert spaces the sampling distribution can miss parts of the support needed to form unbiased estimators. These statistical pathologies lead to unreliable optimization trajectories in stochastic reconfiguration or incorrect variational dynamics in time-dependent variational Monte Carlo (t-VMC) and severely limit the power of the numerical simulations. We introduce blurred sampling to address these difficulties. The method has a number of rigorous properties that make it well behaved, effective, and computationally efficient. Additionally, it is a postprocessing approach that can be used without modifying the underlying sampler and incurs only minimal overhead. We demonstrate its effectiveness in a broad range of problems—including ground-state optimization in both continuum and discrete settings as well as in time-dependent variational Monte Carlo, where it resolves previously identified failure modes—and further apply it to large-scale problems in spin dynamics. This work establishes a broadly applicable framework for robust VMC and t-VMC calculations.
{"title":"Removing Nodal and Support-Mismatch Pathologies in Variational Monte Carlo via Blurred Sampling","authors":"Zhou-Quan Wan,Roeland Wiersema,Shiwei Zhang","doi":"10.1103/jrn5-gv19","DOIUrl":"https://doi.org/10.1103/jrn5-gv19","url":null,"abstract":"Variational Monte Carlo (VMC) is a powerful and fast-growing method for optimizing and evolving parametrized many-body wave functions, especially with modern neural-network quantum states. In practice, however, the stochastic estimators that form the backbone of the method can become unstable or biased due to the presence of nodes, a ubiquitous feature of quantum wave functions. In the continuum, this results in heavy-tailed estimators with potentially divergent variances, while in discrete Hilbert spaces the sampling distribution can miss parts of the support needed to form unbiased estimators. These statistical pathologies lead to unreliable optimization trajectories in stochastic reconfiguration or incorrect variational dynamics in time-dependent variational Monte Carlo (t-VMC) and severely limit the power of the numerical simulations. We introduce blurred sampling to address these difficulties. The method has a number of rigorous properties that make it well behaved, effective, and computationally efficient. Additionally, it is a postprocessing approach that can be used without modifying the underlying sampler and incurs only minimal overhead. We demonstrate its effectiveness in a broad range of problems—including ground-state optimization in both continuum and discrete settings as well as in time-dependent variational Monte Carlo, where it resolves previously identified failure modes—and further apply it to large-scale problems in spin dynamics. This work establishes a broadly applicable framework for robust VMC and t-VMC calculations.","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":"163 1","pages":""},"PeriodicalIF":12.5,"publicationDate":"2026-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148894418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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