Research works

Conductivity of a non-Galilean-invariant Fermi liquid: Exact solution of the kinetic equation

We obtain an exact expression for the conductivity of a disordered, non-Galilean-invariant Fermi liquid by solving the kinetic equation with both screened Coulomb and $z=3$ Pomeranchuk critical interactions. While consistent with previous asymptotic results, our solution shows th...

Sub-kJ/mol Precision at Practical Cost for Molecular Solids through Local Coupled-Cluster Approaches

Abstract Generation of numerically converged coupled-cluster reference energies of molecular crystals remains highly non-routine. Yet, such data points are critically needed as computational methodologies strive to reach correlated wave-function accuracy in condensed-phase system...

Machine Learning the Nonradiative Decay Modes in Photochemical Processes

Abstract Nonradiative decay in photoexcited molecular systems is driven by nuclear motion toward conical intersections (CIs), where electronic states become degenerate and nonadiabatic transitions occur. Identifying the nuclear degrees of freedom responsible for CI access from no...

Smoothing out the edges: continuous-time estimation with Gaussian process motion priors on factor graphs

Continuous-time state estimation is gaining in popularity due to its abilities to provide smooth solutions, handle asynchronous sensors and interpolate between data points. While there are two main paradigms, parametric (e.g., temporal basis functions, splines) and nonparametric...

Machine-learned, finite temperature Fermi-operator expansions suitable for GPUs and AI-hardware

We present several finite-temperature recursive Fermi–operator expansion schemes based on the second-order spectral projection (SP2) method. Our approach builds on a previous observation that the electronic structure problem, as formulated through a recursive SP2 expansion, can b...

Practical validation of synthetic pre-crash scenarios

The representativeness of synthetic pre-crash scenarios is crucial for assessing the safety impact of Driving Automation Systems through virtual simulations. However, a gap remains in the robust evaluation of synthetic pre-crash scenarios' practical equivalence to their real-worl...

Curly Kakeya: The Hausdorff dimension of sets containing circles or line segments in many directions

In this paper, we establish a lower bound for the Hausdorff dimension of a set 𝐾 ⊂ ℝ 𝑛 that contains a dilated and translated copy of every meridian, that is, of every ( 𝑑 − 2 ) -dimensional sphere passing through the poles of 𝑆 𝑑 − 1 , a ( 𝑑 − 1 ) -dimensional sphere, with 3 ≤ 𝑑...

Computational homogenization of unsteady flows in a periodic porous medium

The work is devoted to the development and computational implementation of the homogenization method for modeling unsteady flows of a viscous incompressible fluid in periodic porous media taking into account memory effects. At the macrolevel, the flow is described by an integro-d...

Baryon enhancement in jets

The enhancement of the baryon production relative to mesons in small-collision systems is considered a breakthrough result of the Large Hadron Collider since a similar effect in heavy-ion collisions is understood by invoking the formation of the strongly-interacting quark--gluon...

A composite-based analysis of the dynamical linkage of atmospheric rivers, warm conveyor belts, and extratropical cyclones

Abstract. Extratropical cyclones (ETCs), warm conveyor belts (WCBs), and atmospheric rivers (ARs) are dynamically connected features key to understand midlatitude weather and hydroclimate. However, the precise spatial and temporal coupling between the moisture transport in ARs an...

Hamiltonian simulation for 3D elastic wave equations in homogeneous elastic media

We present an explicit quantum circuit construction for Hamiltonian simulation of a first-order velocity--stress formulation of the three-dimensional elastic wave equation in homogeneous isotropic media. Previous studies have shown how elastic wave equations can be cast into form...

Spontaneous emission from driven polar quantum systems

We investigate spontaneous radiative processes in a driven polar two-level system whose interaction with the laser field is dominated by broken inversion symmetry rather than by the usual transition dipole coupling. Using a polaron transformation, we derive the dressed eigenstate...

Conformal data for the $O(2)$ Wilson-Fisher CFT in $(2+1)$-dimensional spacetime from exact diagonalization and matrix product states on the fuzzy sphere

We study at zero temperature a microscopic quantum spin-1 model on the fuzzy sphere that realizes the O(2) O ( 2 ) Wilson-Fisher conformal field theory (CFT) in (2+1) ( 2 + 1 ) -dimensional spacetime at a quantum critical point. Here, we use the fuzzy-sphere regularization as it...

Association of Social Determinants of Health with Delays in Diagnosis and Treatment of Resected Pancreatic Ductal Adenocarcinoma (PDAC)

Abstract Background Delayed diagnosis and treatment worsen survival in pancreatic ductal adenocarcinoma (PDAC). Despite many potential causes, the influence of social determinants of health (SDoH) is understudied. We evaluated whether SDoH impact delays in diagnosis and treatment...

Improved desalination by polymer grafting

Freshwater scarcity demands desalination technologies that are efficient, scalable, and sustainable. Capacitive deionisation (CDI) is promising but remains limited by inefficient ion adsorption and poor charge utilisation. Here, we show that suitably chosen polyampholytic block c...

On-Surface Synthesis of a Low Bandgap Cyclopenta[ c , d ]azulene-Based Polymer

Abstract Nonbenzenoid topologies offer a compelling strategy to tailor the electronic properties of low-dimensional carbon materials. Here, we report the on-surface synthesis of a nonalternant polymer incorporating a [7–5–5] cyclopenta[c,d]azulene (CPA) motif on Au(111) via therm...

Evaluation-type deformed modules over the quantum affine vertex algebras of type $A$

Let $\mathcal{V}^c(\mathfrak{gl}_N)$ be Etingof-Kazhdan's quantum affine vertex algebra associated with the trigonometric $R$-matrix. We establish a connection between suitably generalized deformed $ϕ$-coordinated $\mathcal{V}^c(\mathfrak{gl}_N)$-modules and the representations o...

All-Optical Ultrafast Pure Spin Current in the Altermagnet Cr2SO

Abstract All-optical generation of pure spin current─the flow of spin in the absence of a corresponding charge flow─relies on symmetry based compensation between the two spin channels. 2D d-wave altermagnets, which in many respects are ideal spintronic materials due to their very...

Growth and fabrication of advanced PbTe-Pb quantum devices

This repository contains the raw data and processing codes within the paper "Growth and fabrication of advanced PbTe-Pb quantum devices".

Enhancing PISA 2022 mathematics performance in Slovenia: a gender analysis approach to additional instruction methods

Abstract The PISA 2022 datasets offer valuable insights into factors influencing student performance in mathematics. This exploratory study examines supplementary instructional methods, including one-on-one tutoring, video resources, and group study, and their associations with S...