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We present numerical measurements of the power spectrum response function of the gravitational growth of cosmic structures, defined as the functional derivative of the nonlinear spectrum with respect to the linear counterpart, based on…

宇宙学与河外天体物理 · 物理学 2017-12-20 Takahiro Nishimichi , Francis Bernardeau , Atsushi Taruya

Evolutionary computation is an important component within various fields such as artificial intelligence research, reinforcement learning, robotics, industrial automation and/or optimization, engineering design, etc. Considering the…

神经与进化计算 · 计算机科学 2023-05-23 Nihat Engin Toklu , Timothy Atkinson , Vojtěch Micka , Paweł Liskowski , Rupesh Kumar Srivastava

We present results obtained by a software we developed for computing observational cosmological inflation parameters: the scalar spectral index ($n_s$) and the tensor-to-scalar ratio ($r$) for a standard single field and tachyon inflation,…

广义相对论与量子宇宙学 · 物理学 2019-03-27 Milan Milošević , Neven Bilić , Dragoljub D. Dimitrijević , Goran S. Djordjevic , Marko Stojanović

We present trainsum, a versatile Python package for doing computations with multidimensional quantics tensor trains: https://github.com/fh-igd-iet/trainsum. Using the Array API standard together with opt_einsum, trainsum allows the…

数学软件 · 计算机科学 2026-02-25 Paul Haubenwallner , Matthias Heller

The calculation of thermal conductivity in insulating solids at temperatures below the Debye temperature is problematic, due to the breakdown of classical and semi-classical approaches. In this work, we present a fully quantum methodology…

统计力学 · 物理学 2026-02-19 Vladislav Efremkin , Stefano Mossa , Jean-Louis Barrat , Markus Holzmann

PyLlama is a handy Python toolkit to compute the electromagnetic reflection and transmission properties of arbitrary multilayered linear media, including the case of anisotropy. Relying on a $4 \times 4$-matrix formalism, PyLlama implements…

光学 · 物理学 2021-12-24 Mélanie M. Bay , Silvia Vignolini , Kevin Vynck

We present the public release of EXP, a basis function expansion C++ library and Python package for running N-body galactic simulations and dynamical discovery. EXP grew out of the need for methodology that seamlessly connects theoretical…

星系天体物理 · 物理学 2025-05-13 Michael S. Petersen , Martin D. Weinberg

A general method for computing derivatives of solution fields and other simulation outputs, with respect to arbitrary input quantities, is proposed. The method of automatic differentiation is used to carry out differentiation and propagate…

计算物理 · 物理学 2018-07-13 Christopher T. DeGroot

We show how importance sampling can be used to reconstruct the statistics of rare cosmological fluctuations in stochastic inflation. We have developed a publicly available package, PyFPT, that solves the first-passage time problem of…

宇宙学与河外天体物理 · 物理学 2022-10-27 Joseph H. P. Jackson , Hooshyar Assadullahi , Kazuya Koyama , Vincent Vennin , David Wands

We present WarmSPy, a numerical code in Python designed to solve for the perturbations' equations in warm inflation models and compute the corresponding scalar power spectrum at CMB horizon crossing. In models of warm inflation, a radiation…

宇宙学与河外天体物理 · 物理学 2024-01-17 Gabriele Montefalcone , Vikas Aragam , Luca Visinelli , Katherine Freese

We introduce pymovements: a Python package for analyzing eye-tracking data that follows best practices in software development, including rigorous testing and adherence to coding standards. The package provides functionality for key…

We present scope (Simulated CCD Observations for Photometric Experimentation), a Python package to create a forward model of telescope detectors and simulate stellar targets with motion relative to the CCD. The primary application of this…

天体物理仪器与方法 · 物理学 2019-05-08 Nicholas Saunders , Rodrigo Luger , Rory Barnes

Power system operators need new, efficient operational tools to use the flexibility of distributed resources and deal with the challenges of highly uncertain and variable power systems. Transmission system operators can consider the…

软件工程 · 计算机科学 2025-07-01 Demetris Chrysostomou , Jose Luis Rueda Torres , Jochen Lorenz Cremer

The analysis of experimental results with Python often requires writing many code scripts which all need access to the same set of functions. In a common field of research, this set will be nearly the same for many users. The qspec Python…

计算物理 · 物理学 2025-03-18 Patrick Müller , Wilfried Nörtershäuser

We present a C++ software package called PhaseTracer for mapping out cosmological phases, and potential transitions between them, for Standard Model extensions with any number of scalar fields. PhaseTracer traces the minima of effective…

高能物理 - 唯象学 · 物理学 2020-06-30 Peter Athron , Csaba Balazs , Andrew Fowlie , Yang Zhang

We introduce PyText - a deep learning based NLP modeling framework built on PyTorch. PyText addresses the often-conflicting requirements of enabling rapid experimentation and of serving models at scale. It achieves this by providing simple…

The quantum theory of cosmological perturbations in single field inflation is formulated in terms of a path integral. Starting from a canonical formulation, we show how the free propagators can be obtained from the well known…

广义相对论与量子宇宙学 · 物理学 2010-12-14 Tomislav Prokopec , Gerasimos Rigopoulos

This paper accompanies first release of libmpdata++, a C++ library implementing the Multidimensional Positive-Definite Advection Transport Algorithm (MPDATA). The library offers basic numerical solvers for systems of generalised transport…

This note provides a lightweight tutorial on using Eigen, a C++ template library for linear algebra, to implement statistical and machine learning algorithms. The emphasis is practical rather than methodological: we show how common matrix…

统计计算 · 统计学 2026-05-22 Seyoung Lee , Kwan-Young Bak

Rapid-turn slow-roll inflationary trajectories have been shown to be an attractor in two-field models, provided the turn rate is near constant and larger than the slow-roll parameters. These trajectories can produce primordial spectra…

宇宙学与河外天体物理 · 物理学 2024-09-06 Raul Wolters , Oksana Iarygina , Ana Achucarro