Reports on progress in physics. Physical Society (Great Britain)最新文献_第2页

Imaging nuclei by smashing them at high energies: how are their shapes revealed after destruction? 通过高能粉碎原子核成像：它们在破坏后的形状是如何显示的？

IF 20.7

Reports on progress in physics. Physical Society (Great Britain) Pub Date : 2025-09-23 DOI: 10.1088/1361-6633/ae0654

Jiangyong Jia

引用次数: 0

Field theories of active particle systems and their entropy production. 活跃粒子系统的场论及其熵的产生。

IF 20.7

Reports on progress in physics. Physical Society (Great Britain) Pub Date : 2025-09-22 DOI: 10.1088/1361-6633/adff30

Gunnar Pruessner, Rosalba Garcia-Millan

{"title":"Field theories of active particle systems and their entropy production.","authors":"Gunnar Pruessner, Rosalba Garcia-Millan","doi":"10.1088/1361-6633/adff30","DOIUrl":"10.1088/1361-6633/adff30","url":null,"abstract":"Active particles that translate chemical energy into self-propulsion can maintain a far-from-equilibrium steady state and perform work. The entropy production measures how far from equilibrium such a particle system operates and serves as a proxy for the work performed. Field theory offers a promising route to calculating entropy production, as it allows for many interacting particles to be considered simultaneously. Approximate field theories obtained by coarse-graining or smoothing that draw on additive noise can capture densities and correlations well, but they generally ignore the microscopic particle nature of the constituents, thereby producing spurious results for the entropy production. As an alternative we demonstrate how to use Doi-Peliti field theories, which capture the microscopic dynamics, including reactions and interactions with external and pair potentials. Such field theories are in principle exact, while offering a systematic approximation scheme, in the form of diagrammatics. We demonstrate how to construct them from a Fokker-Planck equation and show how to calculate entropy production of active matter from first principles. This framework is easily extended to include interaction. We use it to derive exact, compact and efficient general expressions for the entropy production for a vast range of interacting conserved particle systems. These expressions are independent of the underlying field theory and can be interpreted as the spatial average of thelocalentropy production. They are readily applicable to numerical and experimental data. In general, the entropy production due to any pair interaction draws at most on the three point, equal time density; and ann-point interaction on the(2n-1)-point density. We illustrate the technique in a number of exact, tractable examples, including some with pair-interaction as well as in a system of many interacting Active Brownian Particles.","PeriodicalId":74666,"journal":{"name":"Reports on progress in physics. Physical Society (Great Britain)","volume":" ","pages":""},"PeriodicalIF":20.7,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144981865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Continuous order-to-order quantum phase transitions from fixed-point annihilation. 定点湮灭的连续有序量子相变。

IF 20.7

Reports on progress in physics. Physical Society (Great Britain) Pub Date : 2025-09-15 DOI: 10.1088/1361-6633/ae01d5

David J Moser, Lukas Janssen

{"title":"Continuous order-to-order quantum phase transitions from fixed-point annihilation.","authors":"David J Moser, Lukas Janssen","doi":"10.1088/1361-6633/ae01d5","DOIUrl":"10.1088/1361-6633/ae01d5","url":null,"abstract":"A central concept in the theory of phase transitions beyond the Landau-Ginzburg-Wilson paradigm is fractionalization: the formation of new quasiparticles that interact via emergent gauge fields. This concept has been extensively explored in the context of continuous quantum phase transitions between distinct orders that break different symmetries. We propose a mechanism for continuous order-to-order quantum phase transitions that operates independently of fractionalization. This mechanism is based on the collision and annihilation of two renormalization group fixed points: a quantum critical fixed point and an infrared stable fixed point. The annihilation of these fixed points rearranges the flow topology, eliminating the disordered phase associated with the infrared stable fixed point and promoting a second critical fixed point, unaffected by the collision, to a quantum critical point between distinct orders. We argue that this mechanism is relevant to a broad spectrum of physical systems. In particular, it can manifest in Luttinger fermion systems in three spatial dimensions, leading to a continuous quantum phase transition between an antiferromagnetic Weyl semimetal state, which breaks time-reversal symmetry, and a nematic topological insulator, characterized by broken lattice rotational symmetry. This continuous antiferromagnetic-Weyl-to-nematic-insulator transition might be observed in rare-earth pyrochlore iridatesR2Ir2O7. Other possible realizations include kagome quantum magnets, quantum impurity models, and quantum chromodynamics with supplemental four-fermion interactions.","PeriodicalId":74666,"journal":{"name":"Reports on progress in physics. Physical Society (Great Britain)","volume":" ","pages":""},"PeriodicalIF":20.7,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144981889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Search for emerging jets inppcollisions ats=13.6TeV with the ATLAS experiment. 用ATLAS实验寻找在√s = 13.6 TeV的碰撞中出现的喷流。

IF 20.7

Reports on progress in physics. Physical Society (Great Britain) Pub Date : 2025-09-04 DOI: 10.1088/1361-6633/adfe17

{"title":"Search for emerging jets inppcollisions ats=13.6TeV with the ATLAS experiment.","authors":"","doi":"10.1088/1361-6633/adfe17","DOIUrl":"10.1088/1361-6633/adfe17","url":null,"abstract":"A search for emerging jets is presented using 51.8 fb-1of proton-proton collision data ats=13.6TeV, collected by the ATLAS experiment during 2022 and 2023. The search explores a hypothetical dark sector featuring 'dark quarks' that are charged under a confining gauge group and couple to the standard model (SM) via a new mediator particle. These dark quarks undergo showering and hadronisation within the dark sector, forming long-lived dark mesons that decay back into SM particles. This results in jets that contain multiple displaced vertices known as emerging jets. The analysis targets events with pairs of emerging jets, produced either through a vector mediator,Z', in thes-channel, or a scalar mediator, Φ, in thet-channel. No significant excess over the SM background is observed. Assuming a dark pion proper decay length between 5 mm and 50 mm,Z' mediator masses between 600 GeV and 2550 GeV are excluded for quark and dark quark coupling values of 0.01 and 0.1, respectively. For a quark dark-quark coupling of 0.1, Φ mediator masses between 600 GeV and 1375 GeV are excluded. These results represent the first direct search targeting emerging jet pair production via aZ' mediator, as well as the first study of emerging jet production mediated by a scalar particle exchanged in thet-channel.","PeriodicalId":74666,"journal":{"name":"Reports on progress in physics. Physical Society (Great Britain)","volume":" ","pages":""},"PeriodicalIF":20.7,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144981868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dimensionality and correlation effects in coupled carbon nanotube arrays. 耦合碳纳米管阵列的维数及相关效应。

IF 20.7

Reports on progress in physics. Physical Society (Great Britain) Pub Date : 2025-09-01 DOI: 10.1088/1361-6633/adfd0f

Xiaosong Deng, Weili Li, Xiaohan Cheng, Guanhua Long, Chenwei Fan, Zixuan Zhang, Yifan Liu, Yumeng Ze, Yanning Zhang, Chuanhong Jin, Ning Kang, Zhiyong Zhang

{"title":"Dimensionality and correlation effects in coupled carbon nanotube arrays.","authors":"Xiaosong Deng, Weili Li, Xiaohan Cheng, Guanhua Long, Chenwei Fan, Zixuan Zhang, Yifan Liu, Yumeng Ze, Yanning Zhang, Chuanhong Jin, Ning Kang, Zhiyong Zhang","doi":"10.1088/1361-6633/adfd0f","DOIUrl":"10.1088/1361-6633/adfd0f","url":null,"abstract":"Coupled one-dimensional (1D) conductor array has been proposed as a promising platform to explore the electronic correlation phenomena in higher dimensions and rich electronic phases; however, these architectures have been challenging to configure over the past few decades. Well-aligned semiconducting carbon nanotubes (CNTs) have been demonstrated as a promising channel material to construct ultra-scaled transistors for future integrated circuits, but their transport behaviors, especially the tunable dimensionality and electron-electron (e-e) interactions, remain elusive and are needed to explore the correlated electronic phases. Here, we experimentally realize a dimensional transition with controlled electronic correlationsin situusing coupled quantum wire arrays that contain well-aligned CNTs in a two-dimensional (2D) film. The tunability of the CNT arrays through a high-efficient top gate allows us to construct the phase diagram of a coupled 1D electron system. We successfully extend Tomonaga-Luttinger liquid (LL) to a 2D system and observe a gate-tunable e-e interaction, with a universal scaling behavior, as the start of the phase diagram. Consequently, we demonstrate that the transport behavior of the CNT arrays evolves from the LL to the Fermi liquid or Coulomb blockade regime by varying thee-einteraction and temperature. As a result, the electronic phase diagram is obtained for dimensional transitions across three dimensionalities, which provides an opportunity to explore low-dimensional electronic phase transitions with engineered artificial arrays of 1D wires and deepens understanding of transport behavior of the CNT array for electronics applications.","PeriodicalId":74666,"journal":{"name":"Reports on progress in physics. Physical Society (Great Britain)","volume":" ","pages":""},"PeriodicalIF":20.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144884483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heralded generation of entanglement with photons. 预示着光子纠缠的新一代。

IF 20.7

Reports on progress in physics. Physical Society (Great Britain) Pub Date : 2025-08-29 DOI: 10.1088/1361-6633/adf85e

Imogen Forbes, Farzad Ghafari, Edward C R Deacon, Sukhjit P Singh, Emilien Lavie, Patrick Yard, Reece D Shaw, Anthony Laing, Nora Tischler

{"title":"Heralded generation of entanglement with photons.","authors":"Imogen Forbes, Farzad Ghafari, Edward C R Deacon, Sukhjit P Singh, Emilien Lavie, Patrick Yard, Reece D Shaw, Anthony Laing, Nora Tischler","doi":"10.1088/1361-6633/adf85e","DOIUrl":"10.1088/1361-6633/adf85e","url":null,"abstract":"Entangled states of photons form the backbone of many quantum technologies. Due to the lack of effective photon-photon interactions, the generation of these states is typically probabilistic. In the prevailing but fundamentally limited generation technique, known as postselection, the target photons are measured destructively in the generation process. By contrast, in the alternative approach-heralded state generation-the successful creation of a desired state is verified by the detection of ancillary photons. Heralded state generation is superior to postselection in several critical ways: it enables free usage of the prepared states, allows for the success probability to be arbitrarily increased via multiplexing, and provides a scalable route to quantum information processing using photons. Here, we review theoretical proposals and experimental realisations of heralded entangled photonic state generation, as well as the impact of realistic experimental errors. We then discuss the wide-ranging applications of these states for quantum technologies, including resource states in linear optical quantum computing, entanglement swapping for repeater networks, fundamental physics, and quantum metrology.","PeriodicalId":74666,"journal":{"name":"Reports on progress in physics. Physical Society (Great Britain)","volume":" ","pages":""},"PeriodicalIF":20.7,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144796348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Observation of a pseudoscalar excess at the top quark pair production threshold. 顶夸克对产生阈值处伪标量过剩的观察。

IF 20.7

Reports on progress in physics. Physical Society (Great Britain) Pub Date : 2025-08-22 DOI: 10.1088/1361-6633/adf7d3

The Cms Collaboration

引用次数: 0

Large thermal Hall effect in MnPS₃. MnPS3中的大热霍尔效应。

IF 20.7

Reports on progress in physics. Physical Society (Great Britain) Pub Date : 2025-08-20 DOI: 10.1088/1361-6633/adf916

Mohamed Nawwar, Robin R Neumann, Jiamin Wen, Ingrid Mertig, Alexander Mook, Joseph P Heremans

引用次数: 0

The Dean-Kawasaki equation and stochastic density functional theory. Dean-Kawasaki方程与随机密度泛函理论。

IF 20.7

Reports on progress in physics. Physical Society (Great Britain) Pub Date : 2025-08-14 DOI: 10.1088/1361-6633/adee2e

Pierre Illien

{"title":"The Dean-Kawasaki equation and stochastic density functional theory.","authors":"Pierre Illien","doi":"10.1088/1361-6633/adee2e","DOIUrl":"10.1088/1361-6633/adee2e","url":null,"abstract":"The Dean-Kawasaki (DK) equation, which is at the basis of stochastic density functional theory (SDFT), was proposed in the mid-nineties to describe the evolution of the density of interacting Brownian particles, which can represent a large number of systems such as colloidal suspensions, supercooled liquids, polymer melts, biological molecules, active or chemotactic particles, or ions in solution. This theoretical framework, which can be summarized as a mathematical reformulation of the coupled overdamped Langevin equations that govern the dynamics of the particles, has attracted a significant amount of attention during the past thirty years. In this review, I present the context in which this framework was introduced, and I recall the main assumptions and calculation techniques that are employed to derive the DK equation. Then, in the broader context of statistical mechanics, I show how SDFT is connected to other theories, such fluctuating hydrodynamics, macroscopic fluctuation theory, or mode-coupling theory. The mathematical questions that are raised by the DK equation are presented in a non-specialist language. In the last parts of the review, I show how the original result was extended in several directions, I present the different strategies and approximations that have been employed to solve the DK equation, both analytically and numerically. I finally list the different situations where SDFT was employed to describe the fluctuations of Brownian suspensions, from the physics of active matter to the description of charged particles and electrolytes.","PeriodicalId":74666,"journal":{"name":"Reports on progress in physics. Physical Society (Great Britain)","volume":" ","pages":""},"PeriodicalIF":20.7,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144610564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An overview of CV-MDI-QKD. CV-MDI-QKD综述。

IF 20.7

Reports on progress in physics. Physical Society (Great Britain) Pub Date : 2025-08-06 DOI: 10.1088/1361-6633/adf4f4

Alasdair I Fletcher, Cillian Harney, Masoud Ghalaii, Panagiotis Papanastasiou, Alexandros Mountogiannakis, Gaetana Spedalieri, Adnan A E Hajomer, Tobias Gehring, Stefano Pirandola

引用次数: 0