Pavel Tashev,Stefan Petrov,Matthew T. Diaz,Friederike Metz,Alaina M. Green,Norbert M. Linke,Marin Bukov
{"title":"Reinforcement learning to disentangle multiqubit quantum states from partial observations","authors":"Pavel Tashev,Stefan Petrov,Matthew T. Diaz,Friederike Metz,Alaina M. Green,Norbert M. Linke,Marin Bukov","doi":"10.1103/byp8-29dg","DOIUrl":"https://doi.org/10.1103/byp8-29dg","url":null,"abstract":"","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":"37 1","pages":""},"PeriodicalIF":12.5,"publicationDate":"2026-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149208887","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}
Pablo Gottheil,Saraswat Bhattacharyya,Philip Friedrich,Kilian Roth,Mario Merkel,Kolya Lettl,Kudor Harb,Salvador Rivera-Moreno,Assal Daneshgar,Jonas Wieland,Bahriye Aktas,Jens-Uwe Blohmer,Hans Kubitschke,Anne-Sophie Wegscheider,Christine Sers,Igor M. Sauer,Armin Jarosch,Axel Niendorf,Julia M. Yeomans,Josef A. Käs
{"title":"Self-organization of invasive breast cancer driven by the interplay of active and passive nematic dynamics","authors":"Pablo Gottheil,Saraswat Bhattacharyya,Philip Friedrich,Kilian Roth,Mario Merkel,Kolya Lettl,Kudor Harb,Salvador Rivera-Moreno,Assal Daneshgar,Jonas Wieland,Bahriye Aktas,Jens-Uwe Blohmer,Hans Kubitschke,Anne-Sophie Wegscheider,Christine Sers,Igor M. Sauer,Armin Jarosch,Axel Niendorf,Julia M. Yeomans,Josef A. Käs","doi":"10.1103/z8gf-q6rh","DOIUrl":"https://doi.org/10.1103/z8gf-q6rh","url":null,"abstract":"","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":"51 1","pages":""},"PeriodicalIF":12.5,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149208888","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":"Emergence of open chemical reaction network thermodynamics within closed systems","authors":"Benedikt Remlein,Massimiliano Esposito,Francesco Avanzini","doi":"10.1103/ssn3-44gk","DOIUrl":"https://doi.org/10.1103/ssn3-44gk","url":null,"abstract":"","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":"84 1","pages":""},"PeriodicalIF":12.5,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149208889","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}
Takeshi Hayashida,Koei Matsumoto,Keito Arakawa,Yves Joly,Sergio Di Matteo,Kenji Tamasaku,Yoshikazu Tanaka,Tsuyoshi Kimura
Hematite ( α − F e 2 O 3 ) is a prototypical room-temperature antiferromagnet whose time-reversal-odd magnetic structure has recently attracted renewed attention. While such magnetic symmetry can be characterized in terms of higher-order multipoles beyond the magnetic dipole, their manifestation in measurable physical phenomena has remained largely elusive. In this work, we investigate x-ray absorption near the Fe K -edge of hematite under an applied electric field, which explicitly breaks space-inversion symmetry. We observe an electric-field-induced x-ray nonreciprocal linear dichroism that reflects the time-reversal-odd nature of the magnetic order. A symmetry-resolved multipole analysis attributes this response to the electric-field-induced magnetic quadrupole and the magnetic toroidal octupole induced by the applied electric field. Furthermore, numerical simulations based on density functional theory reproduce the observed spectra, including their dependence on the antiferromagnetic domain and x-ray polarization. These results indicate that electric-field-modulated x-ray absorption measurements, combined with simulations, provide a framework for identifying the higher-order multipoles contributing to measurable physical responses in time-reversal-odd antiferromagnets, thereby facilitating the investigation of hidden symmetry properties in magnetic materials.
{"title":"Electric-Field-Induced X-Ray Nonreciprocal Dichroism in Hematite","authors":"Takeshi Hayashida,Koei Matsumoto,Keito Arakawa,Yves Joly,Sergio Di Matteo,Kenji Tamasaku,Yoshikazu Tanaka,Tsuyoshi Kimura","doi":"10.1103/p5ry-x2wr","DOIUrl":"https://doi.org/10.1103/p5ry-x2wr","url":null,"abstract":"Hematite ( α − F e 2 O 3 ) is a prototypical room-temperature antiferromagnet whose time-reversal-odd magnetic structure has recently attracted renewed attention. While such magnetic symmetry can be characterized in terms of higher-order multipoles beyond the magnetic dipole, their manifestation in measurable physical phenomena has remained largely elusive. In this work, we investigate x-ray absorption near the Fe K -edge of hematite under an applied electric field, which explicitly breaks space-inversion symmetry. We observe an electric-field-induced x-ray nonreciprocal linear dichroism that reflects the time-reversal-odd nature of the magnetic order. A symmetry-resolved multipole analysis attributes this response to the electric-field-induced magnetic quadrupole and the magnetic toroidal octupole induced by the applied electric field. Furthermore, numerical simulations based on density functional theory reproduce the observed spectra, including their dependence on the antiferromagnetic domain and x-ray polarization. These results indicate that electric-field-modulated x-ray absorption measurements, combined with simulations, provide a framework for identifying the higher-order multipoles contributing to measurable physical responses in time-reversal-odd antiferromagnets, thereby facilitating the investigation of hidden symmetry properties in magnetic materials.","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":"12 1","pages":""},"PeriodicalIF":12.5,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149208892","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}
We show that no Einstein-Podolsky-Rosen (EPR)–like bipartite entanglement can be distilled from a tripartite Haar random state | Ψ ⟩ A B C by local unitaries or local operations when each subsystem A , B , or C has fewer than half of the total qubits. Specifically, we derive an upper bound on the probability of sampling a state with EPR-like entanglement at a given EPR fidelity tolerance, showing a doubly exponential suppression in the number of qubits. Our proof relies on a simple volume argument supplemented by an ε -net argument and concentration of measure. Viewing | Ψ ⟩ A B C as a bipartite quantum error-correcting code C → A B , this implies that neither output subsystem A nor B supports any nontrivial logical operator. We also establish general constraints on the structure of tripartite entanglement in Haar random states, showing that W- or Greenberger-Horne-Zeilinger–like entanglement cannot be distilled and that nontrivial global symmetries are absent. Finally, we discuss a physical interpretation in the AdS/CFT correspondence, indicating that a connected entanglement wedge does not necessarily imply bipartite entanglement, contrary to a previous belief.
我们证明，当每个子系统a、B或C的量子比特少于总量子比特的一半时，没有爱因斯坦-波多尔斯基-罗森（EPR）类二部纠缠可以通过局部单位或局部操作从三部哈尔随机态| Ψ⟩a B C中提取出来。具体来说，我们推导了在给定的EPR保真度容限下，对具有EPR样纠缠态的采样概率的上界，显示了量子比特数量的双指数抑制。我们的证明依赖于一个简单的体积论证，辅以ε -净论证和测度的集中。将| Ψ⟩A B C视为二部量子纠错码C→A B，这意味着输出子系统A和B都不支持任何非平凡逻辑运算符。我们还建立了Haar随机态中三方纠缠结构的一般约束，表明W-或Greenberger-Horne-Zeilinger-like纠缠不能被提取，并且不存在非平凡全局对称性。最后，我们讨论了AdS/CFT对应中的物理解释，表明连接的纠缠楔并不一定意味着二部纠缠，这与之前的信念相反。
{"title":"Tripartite Haar Random State Has No Bipartite Entanglement","authors":"Zhi Li,Takato Mori,Beni Yoshida","doi":"10.1103/d7b9-ctw2","DOIUrl":"https://doi.org/10.1103/d7b9-ctw2","url":null,"abstract":"We show that no Einstein-Podolsky-Rosen (EPR)–like bipartite entanglement can be distilled from a tripartite Haar random state | Ψ ⟩ A B C by local unitaries or local operations when each subsystem A , B , or C has fewer than half of the total qubits. Specifically, we derive an upper bound on the probability of sampling a state with EPR-like entanglement at a given EPR fidelity tolerance, showing a doubly exponential suppression in the number of qubits. Our proof relies on a simple volume argument supplemented by an ε -net argument and concentration of measure. Viewing | Ψ ⟩ A B C as a bipartite quantum error-correcting code C → A B , this implies that neither output subsystem A nor B supports any nontrivial logical operator. We also establish general constraints on the structure of tripartite entanglement in Haar random states, showing that W- or Greenberger-Horne-Zeilinger–like entanglement cannot be distilled and that nontrivial global symmetries are absent. Finally, we discuss a physical interpretation in the AdS/CFT correspondence, indicating that a connected entanglement wedge does not necessarily imply bipartite entanglement, contrary to a previous belief.","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":"478 1","pages":""},"PeriodicalIF":12.5,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149208895","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}
Shengqi Sang,Leonardo A. Lessa,Roger S. K. Mong,Tarun Grover,Chong Wang,Timothy H. Hsieh
We propose a refined definition of mixed-state phase equivalence based on locally reversible channel circuits. We show that such circuits preserve topological degeneracy and the locality of all operators including both strong and weak symmetries. Under a locally reversible channel, weak unitary symmetries are locally dressed into channel symmetries, a generalization of symmetry for open quantum systems. For Abelian higher-form symmetries, we show the refined definition preserves anomalies and spontaneous breaking of such symmetries within a phase. As a primary example, a two-dimensional classical loop ensemble is trivial under the previously adopted definition of mixed-state phases. However, it has nontrivial topological degeneracy arising from a mutual anomaly between strong and weak 1-form symmetries, and our results show that it is not connected to a trivial state via locally reversible channel circuits.
{"title":"Mixed-State Phases from Local Reversibility","authors":"Shengqi Sang,Leonardo A. Lessa,Roger S. K. Mong,Tarun Grover,Chong Wang,Timothy H. Hsieh","doi":"10.1103/1kr5-jlcb","DOIUrl":"https://doi.org/10.1103/1kr5-jlcb","url":null,"abstract":"We propose a refined definition of mixed-state phase equivalence based on locally reversible channel circuits. We show that such circuits preserve topological degeneracy and the locality of all operators including both strong and weak symmetries. Under a locally reversible channel, weak unitary symmetries are locally dressed into channel symmetries, a generalization of symmetry for open quantum systems. For Abelian higher-form symmetries, we show the refined definition preserves anomalies and spontaneous breaking of such symmetries within a phase. As a primary example, a two-dimensional classical loop ensemble is trivial under the previously adopted definition of mixed-state phases. However, it has nontrivial topological degeneracy arising from a mutual anomaly between strong and weak 1-form symmetries, and our results show that it is not connected to a trivial state via locally reversible channel circuits.","PeriodicalId":20161,"journal":{"name":"Physical Review X","volume":"26 1","pages":""},"PeriodicalIF":12.5,"publicationDate":"2026-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149208893","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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