Mathematical basis, phase transitions and singularities of (3 1)-dimensional phi4 scalar field model
Zhidong Zhang
https://arxiv.org/abs/2511.07439 https://arxiv.org/pdf/2511.07439 https://arxiv.org/html/2511.07439
arXiv:2511.07439v1 Announce Type: new
Abstract: The lambda phi4 scalar field model that can be applied to interpret pion-pion scattering and properties of hadrons. In this work, the mathematical basis, phase transitions and singularities of a (3 1)-dimensional (i.e., (3 1)D) phi4 scalar field model are investigated. It is found that as a specific example of topological quantum field theories, the (3 1)D phi4 scalar field model must be set up on the Jordan-von Neumann-Wigner framework and dealt with the parameter space of complex time (or complex temperature). The use of the time average and the topologic Lorentz transformation representing Reidemeister moves ensure the integrability, which takes into account for the contributions of nontrivial topological structures to physical properties of the many-body interacting system. The ergodic hypothesis is violated at finite temperatures in the (3 1)D phi4 scalar field model. Because the quantum field theories with ultraviolet cutoff can be mapped to the models in statistical mechanics, the (3 1)D phi4 scalar field model with ultraviolet cutoff is studied by inspecting its relation with the three-dimensional (3D) Ising model. Furthermore, the direct relation between the coupling K in the 3D Ising model and the bare coupling lambda0 in the (3 1)D phi4 scalar field model is determined in the strong coupling limit. The results obtained in the present work can be utilized to investigate thermodynamic physical properties and critical phenomena of quantum (scalar) field theories.
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I think this is interesting, from "Frontiers in Neuroscience" mag. New "HYPOTHESIS AND THEORY article" by Joachim Keppler, head of Department of Consciousness …
High-dimensional dynamical systems: co-existence of attractors, phase transitions, maximal Lyapunov exponent and response to periodic drive
Samantha J. Fournier, Pierfrancesco Urbani
https://arxiv.org/abs/2511.09679
If you—like me—prefer your computing appliances to work more than you prefer them to entertain, these Apple/iOS26 settings might also help you:
Sequoia announces that Alfred Lin and Pat Grady will be elevated to firm stewards, succeeding Roelof Botha, who led Sequoia solo since 2022 (Dan Primack/Axios)
https://www.axios.com/2025/11/04/sequoia-capital-roelof-botha-pat-grady-alfred-lin
Crosslisted article(s) found for math.OC. https://arxiv.org/list/math.OC/new
[1/1]:
- Optimal control of Volterra integral diffusions and application to contract theory
Dylan Possama\"i, Mehdi Talbi
https://arxiv.org/abs/2511.09701 https://mastoxiv.page/@arXiv_mathPR_bot/115547093766733637
- Generalized infinite dimensional Alpha-Procrustes based geometries
Salvish Goomanee, Andi Han, Pratik Jawanpuria, Bamdev Mishra
https://arxiv.org/abs/2511.09801 https://mastoxiv.page/@arXiv_statML_bot/115547135711272091
- Sample Complexity of Quadratically Regularized Optimal Transport
Alberto Gonz\'alez-Sanz, Eustasio del Barrio, Marcel Nutz
https://arxiv.org/abs/2511.09807 https://mastoxiv.page/@arXiv_mathST_bot/115546975796760368
- On the Convergence of Overparameterized Problems: Inherent Properties of the Compositional Struct...
Arthur Castello Branco de Oliveira, Dhruv Jatkar, Eduardo Sontag
https://arxiv.org/abs/2511.09810 https://mastoxiv.page/@arXiv_csLG_bot/115547543989283588
- Implicit Multiple Tensor Decomposition
Kunjing Yang, Libin Zheng, Minru Bai
https://arxiv.org/abs/2511.09916 https://mastoxiv.page/@arXiv_mathNA_bot/115547169767663335
- Theoretical Analysis of Resource-Induced Phase Transitions in Estimation Strategies
Takehiro Tottori, Tetsuya J. Kobayashi
https://arxiv.org/abs/2511.10184 https://mastoxiv.page/@arXiv_physicsbioph_bot/115546979073652600
- Zeroes and Extrema of Functions via Random Measures
Athanasios Christou Micheas
https://arxiv.org/abs/2511.10293 https://mastoxiv.page/@arXiv_statME_bot/115547493525198835
- Operator Models for Continuous-Time Offline Reinforcement Learning
Nicolas Hoischen, Petar Bevanda, Max Beier, Stefan Sosnowski, Boris Houska, Sandra Hirche
https://arxiv.org/abs/2511.10383 https://mastoxiv.page/@arXiv_statML_bot/115547254989932993
- On topological properties of closed attractors
Wouter Jongeneel
https://arxiv.org/abs/2511.10429 https://mastoxiv.page/@arXiv_mathDS_bot/115547276594491411
- Learning parameter-dependent shear viscosity from data, with application to sea and land ice
Gonzalo G. de Diego, Georg Stadler
https://arxiv.org/abs/2511.10452 https://mastoxiv.page/@arXiv_mathNA_bot/115547323782478749
- Formal Verification of Control Lyapunov-Barrier Functions for Safe Stabilization with Bounded Con...
Jun Liu
https://arxiv.org/abs/2511.10510 https://mastoxiv.page/@arXiv_eessSY_bot/115547429321496393
- Direction-of-Arrival and Noise Covariance Matrix joint estimation for beamforming
Vitor Gelsleichter Probst Curtarelli
https://arxiv.org/abs/2511.10639 https://mastoxiv.page/@arXiv_eessAS_bot/115547188796143762
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It doesn't look as if there is much relationship between the coaching staff and any of the players.
The problems are not with either new signings or experienced players. None of them seem to be clear about transitions from attack to defence or the priorities in their own box.
That and the panic at the end of games amongst coaches in the dug out, regardless of the score, is telling.
This is a coaching setup that has lost its way.
I said I'd stay silent but th…
These days, the songs I keep getting stuck in my head are the title song (and transitions) from “Merrily We Roll Along” (#Sondheim) and @… ‘s “Changes.” I guess I just noticed they’re both about change over time!…
#DaylightSavingTime & Health - A Systematic Review of Beneficial & Adverse Effects: https://www.medrxiv.org/content/10.1101/2025.03.17.25324086v2 -> "The apparent benefits of DST during summer months on mortality, DST-Offset on sleep duration and mortality, and Standard Time during winter months on sleep duration argue in favour of keeping transitions. If kept, adverse effects of transitions should be mitigated in individuals susceptible to myocardial infarction or exacerbations of disease" -> Zu Sinn und Unsinn - Uhrenumstellungen aus der Sicht der Chronobiologie und Epidemiologie: https://idw-online.de/de/news860363
Idly working on my Quamina state-machine-based pattern matcher. (https://github.com/timbray/quamina)
Hit a bug that smells like an infinite loop. Looked closer. Hmm, seems like my code traversing a dinky little 4-state automaton thinks it needs to consider 25,165,824 possible state transitions. Need …
#ListeningClub Gotta say the transitions have been really smooth for this vortex. Well done @… sir!
Electron Energy Loss Spectroscopy of oriented targets and magnetic transitions
Ioannis Iatrakis, Valerii Brudanin
https://arxiv.org/abs/2601.05944 https://…
I do wonder if the Voynich Manuscript was just some scribe's (or bored elite's) elaborate piece of handwriting practice. When I was trying to learn Carolingian minuscule decades back, I'd cover pages with gibberish like this trying to get transitions between letters to "look right." It didn't need to say anything; it was about nailing the æsthetic.
While Europe complains and whines that transitions in the way cars are powered are not really possible, or at least not within a generation, and that it is best for Europe to abandon any ambition to lead the way in the global car market, because if you cannot win the race by moving forward, you will at least be the first to return if you crawl backwards, Indonesia is demonstrating an impressive example of an S-curve in
Morning hike in the Lechtal Alps (October 2024)
We seemingly had the valley all to ourselves, for the first few hours the valley floor still mostly frozen with crunchy hoarfrost until the sun was high enough in the sky. The cirque at the end of the valley already completely in deep winter. These transitions (often within just a few minutes) are so magical and unique to mountain regions...
#FootpathFriday
I, too, think some of the efforts of the CSSWG have gotten ahead of the use cases and I, too, think catching our breath would be good.
“Chris’ Corner: Stage 2”
https://blog.codepen.io/2025/10/20/chris-corner-stage-2/
Monumental III 🪦
纪念 III 🪦
📷 Nikon F4E
🎞️ Ilford HP5 Plus 400, expired 1993
#filmphotography #Photography #blackandwhite
Am I the only one who is bewildered that a location so close to city hall, less than 1/3 of a mile to Van Ness BRT, BART, CIvic Center MUNI station, 5, 6 and 19 bus lines is a low priority location for urban infill? Close to a great library and large open space with playgrounds? Why there is not serious activity on the part of the city to build mixed income housing so as to help bring a range of incomes into the community? Why isn't the city mapping a strategy that transitions this n…
Am I the only one who is bewildered that a location so close to city hall, less than 1/3 of a mile to Van Ness BRT, BART, CIvic Center MUNI station, 5, 6 and 19 bus lines is a low priority location for urban infill? Close to a great library and large open space with playgrounds? Why there is not serious activity on the part of the city to build mixed income housing so as to help bring a range of incomes into the community? Why isn't the city mapping a strategy that transitions this n…
Finished "Exiles" by Mason Coile, the nom de plume for Andrew Pyper who, sadly, passed away earlier this year.
A crew of three humans is enroute to Mars to help build a future human colony when the robots sent ahead of them to assemble their base and help them land go dark. Figuring out what has happened slowly transitions this story from sci-fi to horror and it's a great blend.
4.5 stars, rounded up to 5 ⭐⭐⭐⭐⭐
Call for Papers: 'Emotions and Emotionality: The Multi-Affects of the Global South'
https://ift.tt/pvzrBPe
updated: Monday, October 27, 2025 - 10:52amfull name / name of organization: Transitions: Journal of…
via Input 4 RELCFP
Hyperbolic Dispersion and Low-Frequency Plasmons in Electrides
Qi-Dong Hao, Hao Wang, Hong-Xing Song, Xiang-Rong Chen, Hua Y. Geng
https://arxiv.org/abs/2511.17859 https://arxiv.org/pdf/2511.17859 https://arxiv.org/html/2511.17859
arXiv:2511.17859v1 Announce Type: new
Abstract: Natural hyperbolic materials have attracted significant interest in the field of photonics due to their unique optical properties. Based on the initial successful explorations on layered crystalline materials, hyperbolic dispersion was associated with extreme structural anisotropy, despite the rarity of natural materials exhibiting this property. Here we show that non cubic electrides are generally promising natural hyperbolic materials owing to charge localization in interstitial sites. This includes elemental and binary electrides, as well as some two-dimensional materials that show prominent in-plane hyperbolic dispersion. They exhibit low plasma frequencies and a broad hyperbolic window spanning the infrared to the ultraviolet. In semiconductor electrides, anisotropic interband transitions provide an additional mechanism for hyperbolic behaviour. These findings remove the previously held prerequisite of structural anisotropy for natural hyperbolic materials, and open up new opportunities, which might change the current strategy for searching and design photonic materials.
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Exploring vibronic dynamics near a sloped conical intersection with trapped Rydberg ions
Abdessamad Belfakir, Weibin Li
https://arxiv.org/abs/2512.04941 https://arxiv.org/pdf/2512.04941 https://arxiv.org/html/2512.04941
arXiv:2512.04941v1 Announce Type: new
Abstract: We study spin-phonon coupled dynamics in the vicinity of a sloped conical intersection created by laser coupling the electronic (spin) and vibrational degrees of freedom of a pair of trapped Rydberg ions. We show that the shape of the potential energy surfaces can be engineered and controlled by exploiting the sideband transitions of the crystal vibration and dipole-dipole interactions between Rydberg ions in the Lamb-Dicke regime. Using the sideband transition, we realize a sloped conical intersection whose cone axis is only tilted along one spatial axis. When the phonon wavepacket is located in the potential minimum of the lower potential surface, the spin and phonon dynamics are largely frozen owing to the geometric phase effect. When starting from the upper potential surface, the electronic and phonon states tunnel to the lower potential surface, leading to a partial revival of the initial state. In contrast, the dynamics drastically change when the initial wavepackets are away from the conical intersection. The initial state is revived, and is almost entirely irrelevant to whether it is from the lower or upper potential surface. Complete Rabi oscillations of the adiabatic states are found when the wavepacket is initialized on the upper potential surface. The dynamics occur on the microsecond and nanometer scales, implying that Rydberg ions provide a platform for simulating nonadiabatic processes in the vicinity of a sloped conical intersection.
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Convergence Guarantees for Federated SARSA with Local Training and Heterogeneous Agents
Paul Mangold, Elo\"ise Berthier, Eric Moulines
https://arxiv.org/abs/2512.17688 https://arxiv.org/pdf/2512.17688 https://arxiv.org/html/2512.17688
arXiv:2512.17688v1 Announce Type: new
Abstract: We present a novel theoretical analysis of Federated SARSA (FedSARSA) with linear function approximation and local training. We establish convergence guarantees for FedSARSA in the presence of heterogeneity, both in local transitions and rewards, providing the first sample and communication complexity bounds in this setting. At the core of our analysis is a new, exact multi-step error expansion for single-agent SARSA, which is of independent interest. Our analysis precisely quantifies the impact of heterogeneity, demonstrating the convergence of FedSARSA with multiple local updates. Crucially, we show that FedSARSA achieves linear speed-up with respect to the number of agents, up to higher-order terms due to Markovian sampling. Numerical experiments support our theoretical findings.
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Metropolitana VII - 🆙 🆙 🆙
城 VII - 🆙 🆙 🆙
📷 Pentax MX
🎞️ Ilford Pan 100
#filmphotography #Photography #blackandwhite
Call for Papers: 'Emotions and Emotionality: The Multi-Affects of the Global South'
https://ift.tt/pvzrBPe
updated: Monday, October 27, 2025 - 10:52amfull name / name of organization: Transitions: Journal of…
via Input 4 RELCFP
Replaced article(s) found for physics.atom-ph. https://arxiv.org/list/physics.atom-ph/new
[1/1]:
- Fault-tolerant dynamically-decoupled hyper-Ramsey spectroscopy of ultra-narrow clock transitions
T. Zanon-Willette, B. Ilikj, D. Wilkowski, B. Darqui\'e, N. V. Vitanov
Replaced article(s) found for physics.atom-ph. https://arxiv.org/list/physics.atom-ph/new
[1/1]:
- Laser Stabilised Ionising Transitions
Erika Cortese, Simone De Liberato
Hyperfine spectroscopy of optical-cycling transitions in singly ionized thulium
Patrick M\"uller, Andrei Tretiakov, Amanda Younes, Nicole Halawani, Paul Hamilton, Wesley C. Campbell
https://arxiv.org/abs/2512.14885
Replaced article(s) found for physics.atom-ph. https://arxiv.org/list/physics.atom-ph/new
[1/1]:
- Fault-tolerant dynamically-decoupled hyper-Ramsey spectroscopy of ultra-narrow clock transitions
T. Zanon-Willette, B. Ilikj, D. Wilkowski, B. Darqui\'e, N. V. Vitanov
@arXiv_physicsgenph_bot@mastoxiv.page
