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We demonstrate that a suitable coupling between a quintessence scalar field and a pressureless cold dark matter (CDM) fluid leads to a constant ratio of the energy densities of both components which is compatible with an accelerated…

Astrophysics · Physics 2008-11-26 Winfried Zimdahl , Diego Pavón , Luis P. Chimento

\texttt{Mixture-Models} is an open-source Python library for fitting Gaussian Mixture Models (GMM) and their variants, such as Parsimonious GMMs, Mixture of Factor Analyzers, MClust models, Mixture of Student's t distributions, etc. It…

Computation · Statistics 2024-02-19 Siva Rajesh Kasa , Hu Yijie , Santhosh Kumar Kasa , Vaibhav Rajan

The Python colorspace package provides a toolbox for mapping between different color spaces which can then be used to generate a wide range of perceptually-based color palettes for qualitative or quantitative (sequential or diverging)…

Graphics · Computer Science 2025-10-07 Reto Stauffer , Achim Zeileis

We present PyOECP, a Python-based flexible open-source software for estimating and modeling the complex permittivity obtained from the open-ended coaxial probe (OECP) technique. The transformation of the measured reflection coefficient to…

Instrumentation and Detectors · Physics 2021-10-01 Tae Jun Yoon , Katie A. Maerzke , Robert P. Currier , Alp T. Findikoglu

Over the past decade, the Python-based Simulations of Chemistry Framework (PySCF) has developed into a widely used open-source platform for electronic structure theory and quantum chemical method development. This article reviews the major…

Chemical Physics · Physics 2026-04-09 Qiming Sun , Matthew R Hermes , Xiaojie Wu , Huanchen Zhai , Xing Zhang , Abdelrahman M. Ahmed , Juan José Aucar , Oliver J. Backhouse , Samragni Banerjee , Peng Bao , Nikolay A. Bogdanov , Kyle Bystrom , Frédéric Chapoton , Ning-Yuan Chen , Ivan Yu. Chernyshov , Helen S. Clifford , Sander Cohen-Janes , Zhi-Hao Cui , Yann D. Damour , Nike Dattani , Linus Bjarne Dittmer , Sebastian Ehlert , Janus Juul Eriksen , Francesco A. Evangelista , Simon A. Ewing , Ardavan Farahvash , Kevin Focke , Yang Gao , Kevin E. Gasperich , Nathan Gillispie , Jonas Greiner , Matthew R. Hennefarth , Jan Hermann , Christopher Hillenbrand , Joonatan Huhtasalo , Basil Ibrahim , Bhavnesh Jangid , Alireza Nejati Javaremi , Andrew J. Jenkins , Yu Jin , Daniel S. King , Derk Pieter Kooi , Jo S. Kurian , Henrik R. Larsson , Bryan Tak Gwong Lau , Seunghoon Lee , Susi Lehtola , Chenghan Li , Hao Li , Jiachen Li , Rui Li , Shuhang Li , Aleksandr O. Lykhin , Ankit Mahajan , Nastasia Mauger , Pablo del Mazo-Sevillano , Jonathan Moussa , Kousuke Nakano , Verena A. Neufeld , Linqing Peng , Hung Q. Pham , Peter Pinski , Pavel Pokhilko , Zhichen Pu , Yubing Qian , Stephen Jon Quiton , Wanja T. Schulze , Thais R. Scott , Aniruddha Seal , James D. Serna , James E. T. Smith , Kori E. Smyser , Terrence Stahl , Chong Sun , Kevin J. Sung , Egor Trushin , Shiv Upadhyay , Ethan A. Vo , Thijs Vogels , Shirong Wang , Tai Wang , Xiao Wang , Xubo Wang , Yuanheng Wang , Mark Williamson , Junjie Yang , Hong-Zhou Ye , Chia-Nan Yeh , Haiyang Yu , Jincheng Yu , Victor Wen-zhe Yu , Chaoqun Zhang , Dayou Zhang , Yichi Zhang , Zijun Zhao , Zehao Zhou , Andrew J. Zhu , Tianyu Zhu , Timothy C. Berkelbach , Laura Gagliardi , Sandeep Sharma , Alexander Sokolov , Garnet Kin-Lic Chan

We introduce Perceval, an open-source software platform for simulating and interfacing with discrete-variable photonic quantum computers, and describe its main features and components. Its Python front-end allows photonic circuits to be…

We present MADLens a python package for producing non-Gaussian lensing convergence maps at arbitrary source redshifts with unprecedented precision. MADLens is designed to achieve high accuracy while keeping computational costs as low as…

Cosmology and Nongalactic Astrophysics · Physics 2020-12-18 Vanessa Böhm , Yu Feng , Max E. Lee , Biwei Dai

Quartessence is one of the alternatives to Lambda-CDM that has lately attracted considerable interest. According to this unifying dark matter/energy scenario, the Universe evolved from an early non-relativistic matter-dominated phase to a…

Astrophysics · Physics 2009-11-10 R. R. R. Reis , M. Makler , I. Waga

The yaglm package aims to make the broader ecosystem of modern generalized linear models accessible to data analysts and researchers. This ecosystem encompasses a range of loss functions (e.g. linear, logistic, quantile regression),…

Computation · Statistics 2021-10-13 Iain Carmichael , Thomas Keefe , Naomi Giertych , Jonathan P Williams

We use linear perturbation theory to study perturbations in dynamical dark energy models. We compare quintessence and tachyonic dark energy models with identical background evolution. We write the corresponding equations for different…

Cosmology and Nongalactic Astrophysics · Physics 2021-11-17 Manvendra Pratap Rajvanshi , Avinash Singh , H. K. Jassal , J. S. Bagla

The emission lines from ionized nebulae allow us to determine their physical and chemical properties, along with the interstellar extinction. "pyEQUIB" is a pure Python open-source package including several application programming interface…

Instrumentation and Methods for Astrophysics · Physics 2024-11-25 A. Danehkar

Perturbation theory is a powerful tool for studying large-scale structure formation in the universe and calculating observables such as the power spectrum or bispectrum. However, beyond linear order, typically this is done by assuming a…

Cosmology and Nongalactic Astrophysics · Physics 2023-08-09 Nicholas Choustikov , Zvonimir Vlah , Anthony Challinor

The Python Sky Model (PySM) is a Python package used by Cosmic Microwave Background (CMB) experiments to simulate maps, in HEALPix pixelization, of the various diffuse astrophysical components of Galactic emission relevant at CMB…

Instrumentation and Methods for Astrophysics · Physics 2021-11-03 Andrea Zonca , Ben Thorne , Nicoletta Krachmalnicoff , Julian Borrill

The dynamic mode decomposition (DMD) is a simple and powerful data-driven modeling technique that is capable of revealing coherent spatiotemporal patterns from data. The method's linear algebra-based formulation additionally allows for a…

A component of dark energy has been recently proposed to explain the current acceleration of the Universe. Unless some unknown symmetry in Nature prevents or suppresses it, such a field may interact with the pressureless component of dark…

Astrophysics · Physics 2010-05-12 J. F. Jesus , R. C. Santos , J. S. Alcaniz , J. A. S. Lima

While there is plentiful evidence in all fronts of experimental cosmology for the existence of a non-vanishing dark energy (DE) density \rho_D in the Universe, we are still far away from having a fundamental understanding of its ultimate…

Astrophysics · Physics 2011-07-19 Javier Grande , Ana Pelinson , Joan Sola

Quintessence and k-essence have been proposed as candidates for the dark energy component of the universe that would be responsible of the currently observed accelerated expansion. In this paper we investigate the degree of resemblance…

Astrophysics · Physics 2008-11-26 Juan M. Aguirregabiria , Luis P. Chimento , Ruth Lazkoz

Pyxel is a novel python tool for end-to-end detection chain simulation i.e. from detector optical effects to readout electronics effects. It is an easy-to-use framework to host and pipeline any detector effect model. It is suited for…

Instrumentation and Methods for Astrophysics · Physics 2020-12-10 Thibaut Prod'homme , Frédéric Lemmel , Matej Arko , Benoît Serra , Elizabeth M. George , Enrico Biancalani , Hans Smit , David Lucsanyi

Stellar abundance analysis relies on flexible, high-performance spectral synthesis. To meet these needs, we present PySME v1.0, an updated Python implementation of Spectroscopy Made Easy (SME) designed for precise and survey-scale modelling…

Instrumentation and Methods for Astrophysics · Physics 2026-05-12 Mingjie Jian , Nikolai Piskunov , Jeff Valenti , Ella Xi Wang , Brian Thorsbro , Henrik Jönsson , Ansgar Wehrhahn

MADNESS (multiresolution adaptive numerical environment for scientific simulation) is a high-level software environment for solving integral and differential equations in many dimensions that uses adaptive and fast harmonic analysis methods…