# \#physics

**URL:** https://discourse.julialang.org/tag/physics/310.md

[Latest](https://discourse.julialang.org/latest.md) · [Categories](https://discourse.julialang.org/categories.md) · [Tags](https://discourse.julialang.org/tags.md)

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## [Research / Scientific Computing Collaboration – Julia Modelling for Subak Water Filtration](https://discourse.julialang.org/t/research-scientific-computing-collaboration-julia-modelling-for-subak-water-filtration/139586)

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**Author:** [@Fen\_Steckenborn](https://discourse.julialang.org/u/Fen_Steckenborn)\
**Replies:** 2\
**Last updated:** [September 23, 2026, 2:26pm UTC](https://discourse.julialang.org/t/research-scientific-computing-collaboration-julia-modelling-for-subak-water-filtration/139586 "2026-09-23T14:26:54Z")

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Location: Remote / Germany–Indonesia collaboration Project: Bali Ecofiltration – Subak Water Management, Bali, Indonesia Engagement: Research collaboration / contract / student or PhD project Start: Flexible / as soon…

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## [\[ANN\] BeamletOptics.jl](https://discourse.julialang.org/t/ann-beamletoptics-jl/131912)

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**Author:** [@StackEnjoyer](https://discourse.julialang.org/u/StackEnjoyer)\
**Replies:** 7\
**Last updated:** [September 22, 2026, 5:27pm UTC](https://discourse.julialang.org/t/ann-beamletoptics-jl/131912 "2026-09-22T17:27:18Z")

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Dear all, we are happy to announce BeamletOptics.jl (or BMO for short), a newly registered Julia package for simulating optical (breadboard) systems. BMO is intended to be a simplistic simulation environment for people …

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## [\[ANN\] Paulimorphic.jl (v0.1.0): Pauli-operator algebra, fermion-to-qubit encodings, and more](https://discourse.julialang.org/t/ann-paulimorphic-jl-v0-1-0-pauli-operator-algebra-fermion-to-qubit-encodings-and-more/139410)

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**Author:** [@frankwswang](https://discourse.julialang.org/u/frankwswang)\
**Replies:** 1\
**Last updated:** [September 13, 2026, 11:09am UTC](https://discourse.julialang.org/t/ann-paulimorphic-jl-v0-1-0-pauli-operator-algebra-fermion-to-qubit-encodings-and-more/139410 "2026-09-13T11:09:47Z")

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I’m happy to announce Paulimorphic.jl, a package for constructing, transforming, and analyzing Pauli operators. The Julia ecosystem already has a few well-established packages built on Pauli operators, e.g., PauliStrings…

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## [\[ANN\] Tethers.jl](https://discourse.julialang.org/t/ann-tethers-jl/118376)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 7\
**Last updated:** [September 11, 2026, 3:16pm UTC](https://discourse.julialang.org/t/ann-tethers-jl/118376 "2026-09-11T15:16:58Z")

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I am proud that I can release a new tutorial for physical modelling with Julia using ModelingToolkit.jl: GitHub - ufechner7/Tethers.jl: Tether models · GitHub This is not really a package, but a project with a lot of e…

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## [Solving the Helium Eigenvalue Problem—where to start?](https://discourse.julialang.org/t/solving-the-helium-eigenvalue-problem-where-to-start/137783)

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**Author:** [@ducksoverip](https://discourse.julialang.org/u/ducksoverip)\
**Replies:** 8\
**Last updated:** [June 29, 2026, 7:18pm UTC](https://discourse.julialang.org/t/solving-the-helium-eigenvalue-problem-where-to-start/137783 "2026-06-29T19:18:53Z")

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I have inherited Fortran code (the same one in this paper) that solves the time-independent Schrodinger equation for the ground state of the helium atom. This is generally a very difficult problem because the Schrodinger…

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## [\[ANN\] SymbolicAWEModels.jl — a compiler for mechanical systems, built for Airborne Wind Energy](https://discourse.julialang.org/t/ann-symbolicawemodels-jl-a-compiler-for-mechanical-systems-built-for-airborne-wind-energy/137473)

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**Author:** [@Bart\_van\_de\_Lint](https://discourse.julialang.org/u/Bart_van_de_Lint)\
**Replies:** 2\
**Last updated:** [June 7, 2026, 8:17am UTC](https://discourse.julialang.org/t/ann-symbolicawemodels-jl-a-compiler-for-mechanical-systems-built-for-airborne-wind-energy/137473 "2026-06-07T08:17:42Z")

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Hi all, I’m happy to announce SymbolicAWEModels.jl (registered, currently v0.11.1). It’s best thought of as a compiler for flexible mechanical systems. You describe a structure — point masses, spring-damper segments…

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## [\[ANN\] QRecoupling.jl: Exact & stable evaluation of quantum recoupling symbols, fusion tensors and q-hypergeometric series](https://discourse.julialang.org/t/ann-qrecoupling-jl-exact-stable-evaluation-of-quantum-recoupling-symbols-fusion-tensors-and-q-hypergeometric-series/137135)

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**Author:** [@seth](https://discourse.julialang.org/u/seth)\
**Replies:** 2\
**Last updated:** [May 20, 2026, 12:11am UTC](https://discourse.julialang.org/t/ann-qrecoupling-jl-exact-stable-evaluation-of-quantum-recoupling-symbols-fusion-tensors-and-q-hypergeometric-series/137135 "2026-05-20T00:11:36Z")

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I’m happy to share QRecoupling.jl, a new Julia package for the exact and numerically stable evaluation of quantum recoupling coefficients ( quantum 3j- and 6j-symbols), topological fusion data (F-symbols, R-matrices), an…

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## [RayTraceHeatTransfer.jl: A repository for 2D Monte Carlo ray tracing and heat transfer](https://discourse.julialang.org/t/raytraceheattransfer-jl-a-repository-for-2d-monte-carlo-ray-tracing-and-heat-transfer/110221)

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**Author:** [@NikoBiele](https://discourse.julialang.org/u/NikoBiele)\
**Replies:** 10\
**Last updated:** [December 31, 2025, 8:47am UTC](https://discourse.julialang.org/t/raytraceheattransfer-jl-a-repository-for-2d-monte-carlo-ray-tracing-and-heat-transfer/110221 "2025-12-31T08:47:04Z")

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Hi Julia people, I just wanted to share that I made this new repository for radiative heat transfer which is essentially a collection of functions I developed during my 9th semester at university. This repository can…

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## [\[ANN\] StructuralVibration.jl](https://discourse.julialang.org/t/ann-structuralvibration-jl/127978)

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**Author:** [@Maucejo](https://discourse.julialang.org/u/Maucejo)\
**Replies:** 17\
**Last updated:** [December 20, 2025, 7:35pm UTC](https://discourse.julialang.org/t/ann-structuralvibration-jl/127978 "2025-12-20T19:35:26Z")

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Hi all, I am pleased to announce my first real contribution to the Julia environment. StructuralVibration.jl is intended to provide a set of tools for generating vibration data either to validate new numerical methods o…

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## [Electric Field Simulation Cyclotron](https://discourse.julialang.org/t/electric-field-simulation-cyclotron/133708)

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**Author:** [@mpirke](https://discourse.julialang.org/u/mpirke)\
**Replies:** 0\
**Last updated:** [November 6, 2025, 12:48pm UTC](https://discourse.julialang.org/t/electric-field-simulation-cyclotron/133708 "2025-11-06T12:48:57Z")

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Hi there! I recently gave a tutorial for a physics course, where we discussed how a cyclotron works. Often one reads that in the gap between the electrodes the electric field is uniform, similar to a plate capacitor and…

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## [Issue: Enzyme + Flux double differentiation on custom layer](https://discourse.julialang.org/t/issue-enzyme-flux-double-differentiation-on-custom-layer/133503)

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**Author:** [@Gianmarco](https://discourse.julialang.org/u/Gianmarco)\
**Replies:** 3\
**Last updated:** [October 30, 2025, 1:52am UTC](https://discourse.julialang.org/t/issue-enzyme-flux-double-differentiation-on-custom-layer/133503 "2025-10-30T01:52:28Z")

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Hi, I’m using Flux and Enzyme for a project, and the entire architecture is built on top of these two libraries. So unless strictly necessary, I’d like to stay within the Flux/Enzyme ecosystem. For both libraries i’m u…

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## [Discretization of semi-coupled wave and diffusion equations fails for step size of pi/(25n) using MethodOfLines.jl](https://discourse.julialang.org/t/discretization-of-semi-coupled-wave-and-diffusion-equations-fails-for-step-size-of-pi-25n-using-methodoflines-jl/106091)

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**Author:** [@NonDairyNeutrino](https://discourse.julialang.org/u/NonDairyNeutrino)\
**Replies:** 6\
**Last updated:** [September 22, 2025, 5:53pm UTC](https://discourse.julialang.org/t/discretization-of-semi-coupled-wave-and-diffusion-equations-fails-for-step-size-of-pi-25n-using-methodoflines-jl/106091 "2025-09-22T17:53:04Z")

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Intro I’m using a semi-coupled system of wave and diffusion equations to simulate a string whose mass/speed of sound diffuses (as a toy to familiarize myself with MethodOfLines.jl for my master’s thesis in high-performan…

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## [Parameter estimation in mathematical models of common functions (sine, cos, exp and other special functions)](https://discourse.julialang.org/t/parameter-estimation-in-mathematical-models-of-common-functions-sine-cos-exp-and-other-special-functions/130325)

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**Author:** [@Geegee](https://discourse.julialang.org/u/Geegee)\
**Replies:** 15\
**Last updated:** [August 28, 2025, 10:25am UTC](https://discourse.julialang.org/t/parameter-estimation-in-mathematical-models-of-common-functions-sine-cos-exp-and-other-special-functions/130325 "2025-08-28T10:25:44Z")

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Hello all glad to have arrived here. I have recently picked up Julia, but am quite excited about it! I have many data sets that follow the same model but the parameters change widely from dataset to dataset. In our la…

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## [Broad phase Collision detection: Bitboard approach](https://discourse.julialang.org/t/broad-phase-collision-detection-bitboard-approach/131512)

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**Author:** [@Gesee](https://discourse.julialang.org/u/Gesee)\
**Replies:** 30\
**Last updated:** [August 12, 2025, 12:45pm UTC](https://discourse.julialang.org/t/broad-phase-collision-detection-bitboard-approach/131512 "2025-08-12T12:45:48Z")

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I have recently tried a new approach to detect potential collisions in a 2D space, just for the broad phase (In this phase we just try to quickly reduce the number of potential collision to check) so I have come up with …

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## [\[ANN\] WaveMixings.jl Nonlinear spectroscopy based on the doorway-window approximation](https://discourse.julialang.org/t/ann-wavemixings-jl-nonlinear-spectroscopy-based-on-the-doorway-window-approximation/130879)

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**Author:** [@apolion](https://discourse.julialang.org/u/apolion)\
**Replies:** 0\
**Last updated:** [July 20, 2025, 9:43am UTC](https://discourse.julialang.org/t/ann-wavemixings-jl-nonlinear-spectroscopy-based-on-the-doorway-window-approximation/130879 "2025-07-20T09:43:22Z")

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INTRODUCTION After almost two year of work :woman\_lifting\_weights:, finally I am introducing WaveMixings.jl, a numerical implementation of the quasi-classical doorway-window approximation, specifically designed for on-th…

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## [Study neutron star interior using DFTK.jl](https://discourse.julialang.org/t/study-neutron-star-interior-using-dftk-jl/130487)

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**Author:** [@raman\_kumar](https://discourse.julialang.org/u/raman_kumar)\
**Replies:** 1\
**Last updated:** [July 5, 2025, 1:27pm UTC](https://discourse.julialang.org/t/study-neutron-star-interior-using-dftk-jl/130487 "2025-07-05T13:27:15Z")

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I want to study nuclear matter within neutron stars and how nuclei move through the super-fluid neutron medium within neutron star crusts. I would like to study crucial details like effective mass, dissipative mechanisms…

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## [\[ANN\] NonlinearSchrodinger.jl: Solving nonlinear Schrodinger equations via higher-order integrators and Darboux Transformations](https://discourse.julialang.org/t/ann-nonlinearschrodinger-jl-solving-nonlinear-schrodinger-equations-via-higher-order-integrators-and-darboux-transformations/55481)

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**Author:** [@ash](https://discourse.julialang.org/u/ash)\
**Replies:** 9\
**Last updated:** [June 5, 2025, 2:32pm UTC](https://discourse.julialang.org/t/ann-nonlinearschrodinger-jl-solving-nonlinear-schrodinger-equations-via-higher-order-integrators-and-darboux-transformations/55481 "2025-06-05T14:32:18Z")

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It is finally my pleasure to announce my very first Julia package, which was written with a ton of feedback from this community, so thank you everyone! I hope I can get some feedback on this package, my very first lin…

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## [Julia vs C++ for computational mechanics - Implicit Material Point Method](https://discourse.julialang.org/t/julia-vs-c-for-computational-mechanics-implicit-material-point-method/129180)

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**Author:** [@jowsky](https://discourse.julialang.org/u/jowsky)\
**Replies:** 13\
**Last updated:** [May 24, 2025, 5:20am UTC](https://discourse.julialang.org/t/julia-vs-c-for-computational-mechanics-implicit-material-point-method/129180 "2025-05-24T05:20:30Z")

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TL;DR : Writing an implicit Material Point Method solver. Would it be that much slower in Julia than C++ for a similar time-effort ? Hello, I am PhD student working on simulating creeping snow. I am currently planning …

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## [Matrix (linear map function) exponential multiplied with vector in ExponentialUtilities.jl](https://discourse.julialang.org/t/matrix-linear-map-function-exponential-multiplied-with-vector-in-exponentialutilities-jl/126957)

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**Author:** [@eveningsilverfox](https://discourse.julialang.org/u/eveningsilverfox)\
**Replies:** 10\
**Last updated:** [March 15, 2025, 12:04am UTC](https://discourse.julialang.org/t/matrix-linear-map-function-exponential-multiplied-with-vector-in-exponentialutilities-jl/126957 "2025-03-15T00:04:07Z")

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I am trying to multiply the exponential of a matrix (available as a function which linearly maps the input vector to an output vector), to a given vector, using expv from ExponentialUtilities.jl using MKL using LinearAl…

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## [Practical Grassmann.jl examples?](https://discourse.julialang.org/t/practical-grassmann-jl-examples/126439)

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**Author:** [@jada](https://discourse.julialang.org/u/jada)\
**Replies:** 1\
**Last updated:** [March 1, 2025, 12:54am UTC](https://discourse.julialang.org/t/practical-grassmann-jl-examples/126439 "2025-03-01T00:54:33Z")

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I am looking for examples how to work with forms, e.g. how to evaluate a form on a vector field, pull back a form, do external derivatives and so on. I already failed at replicating the tutorial linked below, which give…

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## [An interesting physics-based game](https://discourse.julialang.org/t/an-interesting-physics-based-game/124682)

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**Author:** [@mthelm85](https://discourse.julialang.org/u/mthelm85)\
**Replies:** 18\
**Last updated:** [January 28, 2025, 12:45pm UTC](https://discourse.julialang.org/t/an-interesting-physics-based-game/124682 "2025-01-28T12:45:19Z")

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I recently had some time off and built this game that I think turned out well (enough): I suspect some folks in this community might get a kick out of it. Feel free to provide any feedback!

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## [Google's Willow new quantum chip](https://discourse.julialang.org/t/googles-willow-new-quantum-chip/123639)

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**Author:** [@rafael.guerra](https://discourse.julialang.org/u/rafael.guerra)\
**Replies:** 7\
**Last updated:** [December 11, 2024, 2:18pm UTC](https://discourse.julialang.org/t/googles-willow-new-quantum-chip/123639 "2024-12-11T14:18:16Z")

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Google’s Willow new quantum chip: “lends credence to the notion that quantum computation occurs in many parallel universes, in line with the idea that we live in a multiverse, a prediction first made by David Deutsch.” …

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## [Visualizing Electric Equipotentials](https://discourse.julialang.org/t/visualizing-electric-equipotentials/123023)

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**Author:** [@NonDairyNeutrino](https://discourse.julialang.org/u/NonDairyNeutrino)\
**Replies:** 0\
**Last updated:** [November 24, 2024, 7:29pm UTC](https://discourse.julialang.org/t/visualizing-electric-equipotentials/123023 "2024-11-24T19:29:21Z")

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Hey all, not a question this time, but rather I just wanted to share something I whipped up a little bit ago for my class on introductory electromagnetism. Basically, it’s a drop-in way to visualize the contour lines of…

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## [\[ANN\] JuliaPhysics/ABCDMatrixOptics.jl - Ray Transfer Matrix Analysis](https://discourse.julialang.org/t/ann-juliaphysics-abcdmatrixoptics-jl-ray-transfer-matrix-analysis/104107)

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**Author:** [@roflmaostc](https://discourse.julialang.org/u/roflmaostc)\
**Replies:** 1\
**Last updated:** [November 8, 2024, 2:24pm UTC](https://discourse.julialang.org/t/ann-juliaphysics-abcdmatrixoptics-jl-ray-transfer-matrix-analysis/104107 "2024-11-08T14:24:58Z")

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Hi all, ABCDMatrixOptics.jl is small package which implements linear tracing of simple optical systems based on the Ray transfer matrix analysis. The convention of the optical elements is identical to those on Wikipedi…

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## [\[ANN\] TensorKit.jl v0.13](https://discourse.julialang.org/t/ann-tensorkit-jl-v0-13/122259)

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**Author:** [@lkdvos](https://discourse.julialang.org/u/lkdvos)\
**Replies:** 0\
**Last updated:** [November 4, 2024, 9:19pm UTC](https://discourse.julialang.org/t/ann-tensorkit-jl-v0-13/122259 "2024-11-04T21:19:11Z")

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Hi everyone, Together with @juthohaegeman, I’m excited to announce the release of TensorKit.jl v0.13, a Julia package designed for large-scale tensor computations with a touch of category theory. This release brings a …

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## [Shortest Path from contour plot?](https://discourse.julialang.org/t/shortest-path-from-contour-plot/121719)

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**Author:** [@sophibug](https://discourse.julialang.org/u/sophibug)\
**Replies:** 3\
**Last updated:** [October 24, 2024, 9:33pm UTC](https://discourse.julialang.org/t/shortest-path-from-contour-plot/121719 "2024-10-24T21:33:21Z")

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Putting this in general usage, because I’m applying it to chemistry, but shortest path is a frequent problem. I have a 2D potential energy surface of a molecule as two of its axes rotate, formatted for a contour plot. I…

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## [PauliStrings.jl - Quantum many-body simulations with Pauli strings](https://discourse.julialang.org/t/paulistrings-jl-quantum-many-body-simulations-with-pauli-strings/121490)

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**Author:** [@Nichola](https://discourse.julialang.org/u/Nichola)\
**Replies:** 0\
**Last updated:** [October 19, 2024, 7:37pm UTC](https://discourse.julialang.org/t/paulistrings-jl-quantum-many-body-simulations-with-pauli-strings/121490 "2024-10-19T19:37:44Z")

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Hi all ! I’m happy to announce PauliStrings.jl a quantum many body simulation package based on the Pauli strings representation. Docs : https://paulistrings.org/ Paper : \[2410.09654\] Quantum many-body simulations with…

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## [How to nondimensionalize problems with multiple/variable scales?](https://discourse.julialang.org/t/how-to-nondimensionalize-problems-with-multiple-variable-scales/119624)

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**Author:** [@Eben60](https://discourse.julialang.org/u/Eben60)\
**Replies:** 2\
**Last updated:** [September 19, 2024, 9:07pm UTC](https://discourse.julialang.org/t/how-to-nondimensionalize-problems-with-multiple-variable-scales/119624 "2024-09-19T21:07:30Z")

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Even in those purely theoretical-physical problems you are referring to, the own scale of a subsystem may have some arbitrary relations with the “outer” scales. But enter material world, and applying Buckingham’s theore…

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## [DynamicQuantities.jl v0.7.0: efficient and type-stable physical quantities](https://discourse.julialang.org/t/dynamicquantities-jl-v0-7-0-efficient-and-type-stable-physical-quantities/103709)

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**Author:** [@MilesCranmer](https://discourse.julialang.org/u/MilesCranmer)\
**Replies:** 48\
**Last updated:** [August 27, 2024, 3:21pm UTC](https://discourse.julialang.org/t/dynamicquantities-jl-v0-7-0-efficient-and-type-stable-physical-quantities/103709 "2024-08-27T15:21:50Z")

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Happy to share DynamicQuantities.jl v0.7.0! The package has had some major changes over the last few versions, so I think it deserved a new post. DynamicQuantities defines a simple statically-typed Quantity ty…

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## [Sharing the little book "Julia with Physics: An Introduction" - Portuguese](https://discourse.julialang.org/t/sharing-the-little-book-julia-with-physics-an-introduction-portuguese/104706)

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**Author:** [@adeil](https://discourse.julialang.org/u/adeil)\
**Replies:** 0\
**Last updated:** [October 7, 2023, 6:32pm UTC](https://discourse.julialang.org/t/sharing-the-little-book-julia-with-physics-an-introduction-portuguese/104706 "2023-10-07T18:32:59Z")

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Hi, My name is Adeil, I am a Physics teacher at the Ceará State Public School in Brazil.I would like to promote my little book, in Portuguese, that I wrote together with my wife, by Julia for high school. Its name is: “…

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