Tootfinder

Extended temporal coarse-graining in a stratified and confined plasma under thermal fluctuations
Luca Barbieri, Simone Landi, Lapo Casetti, Andrea Verdini
https://arxiv.org/abs/2509.03149

Extended temporal coarse-graining in a stratified and confined plasma under thermal fluctuations
We present an extended investigation of a recently introduced model of gravitationally confined, collisionless plasma (Barbieri et al. 2024a), which showed that rapid temperature fluctuations at the base of the plasma, occurring on timescales much shorter than the electron crossing time, can drive the system into a non-thermal state characterized by anti-correlated temperature and density profiles, commonly referred to as temperature inversion. To describe this phenomenon, a temporal coarse-gra…

Replaced article(s) found for math.GR. https://arxiv.org/list/math.GR/new
[1/1]:
- Quasirandom and quasisimple groups
Marco Barbieri, Luca Sabatini
https://

Status and future directions for direct cross-section measurements of the 13C(a,n)16O reaction for astrophysics
L. Csedreki, Gy. Gy\"urky, D. Rapagnani, G. F. Ciani, M. Aliotta, C. Anannad, L. Barbieri, F. Barile, D. Bemmerer, A. Best, A. Boeltzig, C. Broggini, C. G. Bruno, A. Caciolli, F. Casaburom, F. Cavannak, P. Colombetti, A. Compagnucci, P. Corvisiero, T. Davinson, R. Depalo, A. Di Leva, Z. Elekes, F. Ferraro, A. Formicola, Zs. F\"ul\"opa, G. Gervino, A. Guglielmet…

Status and future directions for direct cross-section measurements of the 13C(a,n)16O reaction for astrophysics
The 13C(a,n)16O reaction is the main neutron source of the s-process taking place in thermally pulsing AGB stars and it is one of the main candidate sources of neutrons for the i-process in the astrophysical sites proposed so far. Therefore, its rate is crucial to understand the production of the nuclei heavier than iron in the Universe. For the first time, the LUNA collaboration was able to measure the 13C(a,n)16O cross section at Ec.m.=0.23-0.3 MeV drastically reducing the uncertainty of the …

Self-consistent generation of the ambipolar electric field in collisionless plasmas via multi-mode electrostatics
Luca Barbieri
https://arxiv.org/abs/2509.03142 https://

Self-consistent generation of the ambipolar electric field in collisionless plasmas via multi-mode electrostatics
In this work, we investigate the generation of the ambipolar electric field in a gravitationally stratified, collisionless plasma atmosphere. In such environments, gravity tends to separate charged species. To prevent separation an electric field, classically described by the Pannekoek-Rosseland expression, is usually imposed externally. Here, we propose a self-consistent method to recover this field based on a multi-mode Fourier expansion of the electrostatic interaction. We show that, under s…

Categorical realization of collapsing subsurfaces and perverse schobers
Li Fan, Suiqi Lu
https://arxiv.org/abs/2510.00104 https://arxiv.org/pdf/2510.00104

Categorical realization of collapsing subsurfaces and perverse schobers
We study the categorification of collapsed Riemann surfaces with quadratic differentials allowing arbitrary order zeros and poles via the Verdier quotient. We establish an isomorphism between the exchange graph of hearts in the quotient category and the exchange graph of mixed-angulations on the collapsed surface. This extends the work of Barbieri-Möller-Qiu-So, who studied Verdier quotients of 3-Calabi-Yau categories and collapsed surfaces without simple poles. We use two methods: a combinato…

Photon-starved polarimetry via functional classical shadows
Matteo Rosati, Miranda Parisi, Linda Sansoni, Eleonora Stefanutti, Andrea Chiuri, Marco Barbieri
https://arxiv.org/abs/2509.19547

Photon-starved polarimetry via functional classical shadows
Polarimetry and optical imaging techniques face challenges in photon-starved scenarios, where the low number of detected photons imposes a trade-off between image resolution, integration time, and sample sensitivity. Here we introduce a quantum-inspired method, functional classical shadows, for reconstructing a polarization profile in the low photon-flux regime. Our method harnesses correlations between neighbouring datapoints, based on the recent realisation that machine learning can estimate …

Crosslisted article(s) found for math.CO. https://arxiv.org/list/math.CO/new
[1/1]:
- Diameter bounds for finite simple Lie algebras
Marco Barbieri, Urban Jezernik, Matev\v{z} Mi\v{s}\v{c}i\v{c}

Separating subsets from their images
Marco Barbieri, Maru\v{s}a Lek\v{s}e, Primo\v{z} Poto\v{c}nik, Kamilla Rekv\'enyi
https://arxiv.org/abs/2508.20731 https://

Separating subsets from their images
Let $G$ be a transitive permutation group. In this paper, we introduce and study the parameter $\m(G)$, which estimates the size of the largest set of points $A$ such that there exists a permutation $g$ with the property that $A \cap A^g$ is empty. In particular, we focus on deriving general bounds for arbitrary transitive groups, and on the asymptotic behaviour of certain families of primitive groups.

The Rise of Particle Physics
S. Ting, H. Georgi, J. Iliopoulos, L. Maiani, A. De Rujula, L. Di Lella, S. Myers, F. Marion, M. Pierini, G. Martinelli, R. Barbieri, G. Battimelli, L. Bonolis, M. Greco, G. Parisi
https://arxiv.org/abs/2507.14275

The Rise of Particle Physics
Discovery of the J Particle at Brookhaven National Laboratory and the Physics of Electrons and Positrons; The Standard Model Yesterday, Today and Tomorrow; The Rise of Gauge Theories: From Many Models to One Theory; From Charm to CP Violation; When the Standard Model Was Ignored; The Discovery of the W and Z Bosons at the CERN Proton-Antiproton Collider; A Personal History of CERN Particle Colliders (1972-2022); The Age of Gravitational Wave Astronomy; Precision Physics in the Era of (HL)LHC; R…

🇺🇦 #NowPlaying on BBCRadio3's #Unclassified
Caterina Barbieri:
🎵 Alphabet of Light
#CaterinaBarbieri
https://open.spotify.com/track/3kM3UAOUkdWtQCP9XUUPqZ

Diameter bounds for finite simple Lie algebras
Marco Barbieri, Urban Jezernik, Matev\v{z} Mi\v{s}\v{c}i\v{c}
https://arxiv.org/abs/2509.15351 https://arxiv…

Diameter bounds for finite simple Lie algebras
We prove strong, explicit diameter bounds for finite simple Lie algebras that parallel Babai's conjecture for finite simple groups. Specifically, we show that any nonabelian finite simple Lie algebra $\mathfrak{g}$ over $\mathbf{F}_p$ has diameter $O((\log{|\mathfrak{g}|})^D)$ for $D \approx 3.21$ with respect to any generating set. For absolutely simple classical Lie algebras over $\mathbf{F}_p$, we establish the sharper bound $O(\log{|\mathfrak{g}|})$ when the Lie type is …

Replaced article(s) found for math.AG. https://arxiv.org/list/math.AG/new
[1/1]:
- A quantized Riemann-Hilbert problem in Donaldson-Thomas theory
Anna Barbieri, Tom Bridgeland, Jacopo Stoppa

Replaced article(s) found for math.SG. https://arxiv.org/list/math.SG/new
[1/1]:
- Remarks on Diffeological Frobenius Reciprocity
Gabriele Barbieri, Jordan Watts, Francois Ziegler

Crosslisted article(s) found for math.RT. https://arxiv.org/list/math.RT/new
[1/1]:
- Diameter bounds for finite simple Lie algebras
Marco Barbieri, Urban Jezernik, Matev\v{z} Mi\v{s}\v{c}i\v{c}

Dynamic Solutions for Hybrid Quantum-HPC Resource Allocation
Roberto Rocco, Simone Rizzo, Matteo Barbieri, Gabriella Bettonte, Elisabetta Boella, Fulvio Ganz, Sergio Iserte, Antonio J. Pe\~na, Petter Sand\r{a}s, Alberto Scionti, Olivier Terzo, Chiara Vercellino, Giacomo Vitali, Paolo Viviani, Jonathan Frassineti, Sara Marzella, Daniele Ottaviani, Iacopo Colonnelli, Daniele Gregori

Dynamic Solutions for Hybrid Quantum-HPC Resource Allocation
The integration of quantum computers within classical High-Performance Computing (HPC) infrastructures is receiving increasing attention, with the former expected to serve as accelerators for specific computational tasks. However, combining HPC and quantum computers presents significant technical challenges, including resource allocation. This paper presents a novel malleability-based approach, alongside a workflow-based strategy, to optimize resource utilization in hybrid HPC-quantum workloads…

Crosslisted article(s) found for math.GR. https://arxiv.org/list/math.GR/new
[1/1]:
- Diameter bounds for finite simple Lie algebras
Marco Barbieri, Urban Jezernik, Matev\v{z} Mi\v{s}\v{c}i\v{c}

Replaced article(s) found for nucl-th. https://arxiv.org/list/nucl-th/new
[1/1]:
- Nambu-Covariant Many-Body Theory I: Perturbative Approximations
M. Drissi, A. Rios, C. Barbieri

Replaced article(s) found for math.SG. https://arxiv.org/list/math.SG/new
[1/1]:
- Remarks on Diffeological Frobenius Reciprocity
Gabriele Barbieri, Jordan Watts, Francois Ziegler