All Questions
57 questions
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26
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How to find electro-thermal analysis of an arbitrary shape of conductor? [closed]
I have an arbitrary shape of conductor in a step file. I would first like to find the resistance of said conductor and then observe the change in resistance due to change in temperature. I do not have ...
0
votes
0
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60
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Are there quantum computing algorithms specialized for machine learning applications?
I've heard that some companies are attempting to utilize quantum computing algorithms for machine learning tasks (ex:protein folding and drug discovery). As far as I know, quantum computing has been ...
2
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0
answers
64
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Cosmological numerical computations
I am unsure where to ask this question, whether here or in the Mathematica stackexchange, but either way, I was wondering what are some recommendations for cosmological computations specifically using ...
1
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1
answer
79
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Does anyone have a good source for writing a Finite Volume Solver
As a pet project I want to try and write my own finite volume solver for a two-phase flow problem. However, while I understand the basics of FEM I have never written a code that solves anything before....
0
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0
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222
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Boundary/contour tracing of a binary image in Python
I'm studying percolation on a square lattice. I identify clusters on the binary lattice using the SciPy API ndimage.label. My goal is to study the external perimeter (hull) of each of these clusters. ...
1
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0
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45
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Toolkit to generate the most general gauge invariant Lagrangian for a given particle content
I am currently working on a BSM model for unification where I am adding scalars for unification. I add many scalars, so finding the most general gauge invariant lagrangian is becoming difficult. Is ...
0
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0
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89
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Good text for writing a realtime physics solver?
What is a good, up-to-date, well-regarded text on writing physics solvers for (e.g.) game engines or realtime simulations?
In particular, treatment of numerical stability, convergence, asymptotic ...
1
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0
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100
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Good Mathematica package for computing Feynman graphs (resource request)?
I was wondering if anyone had any go-to Mathematica packages for computing higher-order Feynman graphs. Specifically ones that would allow me to construct higher spin fields like $h_{\mu\nu}$ and then ...
3
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0
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133
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How to use Python to get mathematical expressions in General Relativity [duplicate]
I'd like to get the metric tensor that describes a non-rotating, uncharged, perfectly spherical black hole whose radius grows with time (it gains mass). For now, I have:
$g_{\mu\nu}=\begin{pmatrix}
-c^...
3
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0
answers
118
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Is there a software that computes simple particle decay kinematics?
I was trying to figure out some details about a specific decay channel for a generic particle accelerator experiment. For instance if I have a proton proton collider with fixed energy, I would like to ...
1
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1
answer
370
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What's the best open source alternatives of COMSOL? [closed]
Good time of day. I need to solve system of differential non-linear equations for 3D system. It requires parallel computing on a cluster. Our lab lacks the license on Comsol. It is necessary to ...
1
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0
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60
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Numerical reference data for a 3D quantum system with Gaussian potential?
I'm currently writing a numerical code to solve the quantum system (in 3D) with an attractive ($v_0 < 0$) Gaussian potential,
$$ V(r) = v_0 \exp(-r^2/r_0^2). $$
It would be nice to have some ...
3
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0
answers
148
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2-particle irreducible (2PI) feynman diagrams
Let me preface this by saying that I'm not too code-savvy, which is probably why I need to ask this here. As a first step, I want to find a way to generate 2-particle irreducible (2PI) Feynman ...
2
votes
1
answer
157
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Smoothed particle hydrodynamics for solving diffusion equation
I'm a novice to the smoothed particle hydrodynamics method and I'm keen to know how it can be used to solve partial differential equations. In particular I want to know how to discretize the spatial ...
0
votes
0
answers
117
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Wick's contractions
According to Wick's theorem, we have
$${\left\langle {T\left[ {\hat A\hat B\hat C\hat D} \right]} \right\rangle _0} = {\left\langle {T\left[ {\hat A\hat B} \right]} \right\rangle _0}{\left\langle {T\...
1
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0
answers
105
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Quantum State Tomography with Machine Learning [closed]
So, I am new to this area. I know a little bit on Machine Learning and Neural Networks and I'm a Physics student and recently I started studying Quantum Information Theory.
I found some papers and ...
1
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0
answers
53
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Simulation software recommendations [closed]
I need a preferably free (open source or student edition) software for modelling of heat diffusion on a cylindrical geometry for a project. What would you recommend?
1
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2
answers
2k
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Is there a powerful interactive tool for visualizing Lorentz transformations of worldlines?
This Geogebra demonstration is pretty amazing for obtaining a more intuitive understanding of Lorentz transformations. However, it has its limitations. If it would allow the user to add worldines and ...
0
votes
1
answer
159
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Program to generate graph of spring-mass-damper system
For a school project, I've been researching mass-spring-damper systems. For this I did an experiment in which I basically filmed a spring with a mass attached to it that went up and down and ...
3
votes
1
answer
296
views
Numerical package for backreaction in general relativity
I am looking for numerical packages (Python/Matlab or some common languages) that can simulate the backreaction of the matter on the Kerr black hole geometry: i.e. assume I have a given initial ...
0
votes
0
answers
67
views
Automated symbolic commutator tool
Is there a software tool (perhaps Mathematica extension?) designed to help with doing algebraic manipulations of non-commutative objects? Specifically, what I'm after is an interface along the lines ...
0
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0
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33
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Except for COMSOL Multiphysics, what is the dedicated simulation tool (free version) that can simulate arrayed acoustics?
Using units and horns, we now have individual replicas. I'm trying to calculate the sound pressure level by arranging hundreds of these in a simulation 1m in front, but when I do it with COMSOL ...
2
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0
answers
148
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Software for qualitative graphs/cartoons?
I have various tools at my disposal, and a lot of use cases that they don't seem ideal for. My current application is a graduate class in chaotic systems, but this is a chronic problem for me both in ...
0
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0
answers
27
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Software packages for calculating Feynman diagrams [duplicate]
I am trying to calculate the two and three-loop divergences in a certain quantum field theory. This is beyond the domain where I can do anything by hand, and I would appreciate any recommendations ...
1
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1
answer
192
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CERN ROOT resource recommendation
During my BSc., I used Python, C and Scilab in addition to Excel to perform data analysis on lab experiments. However, unfortunately I never got the chance to use ROOT which is one of the most widely ...
2
votes
2
answers
203
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What is good software for animating results?
I am a graduate student in physics and many times when I am working on something/playing around with some expressions I would like to visualize how it looks on the computer. I usually already know (...
0
votes
1
answer
46
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Rate Equations for Simulation
I would like to simulate a passively Q-switched laser with MATLAB. Do you have any suggestions - or link to literature/paper - which rate equations I should use? It would be nice if the equations ...
1
vote
2
answers
203
views
Software for calculating perturbation effects in general relativity
I need to evaluate the Einstein tensor/ Ricci tensor and others in a perturbed metric. Suppose my metric is
$g_{ab} =\eta_{ab} +h_{ab}$, where $\eta$ is the Minkowski metric, and $h$ is a small ...
2
votes
0
answers
71
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Computer code to quickly check equation of motion to first or higher order from action (4D spacetime)
I derived equations of motion up to first order from a Lagrangian for a scalar field in a 4D spacetime. Now, I would like to cross-check my results. Is there by any chance an application / code /...
3
votes
2
answers
257
views
Interactive physics simulations and animations
What are some free and open-source interactive simulations, illustrations, animations, demonstrations, videos, calculators and other resources for experimental physics and mathematics like the Wolfram ...
1
vote
1
answer
84
views
Is there software or code that is used to simulate hot ion plasma?
How are hot plasma simulated like fluid particles in CFD?
Note: If this question is topic, i will eventually delete question but i only need an answer.
8
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1
answer
183
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Github for Physicists
I am wondering if there is a platform to which researchers share or publish the code they used in their research. I noticed that many researchers explain their algorithm and math and present the ...
2
votes
2
answers
208
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Does anyone have a workflow for doing basic classical mechanics problems in Mathematica?
I've become really interested lately in the Wolfram Language and using it to work through problems in physics. I'm in a first year course in classical mechanics right now, and I was wondering if ...
2
votes
0
answers
36
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Is there a good physical simulation software (mainly refers to the rigid body mechanics simulation)? [duplicate]
I want to simulate the examples in theoretical mechanics and analytical mechanics. I need a mechanical simulation software, which can customize the force field, spring, rigid body, connecting member ...
0
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0
answers
36
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Looking for a freeware software/app that can solve eigenvalue problems symbolically
I'm taking a quantum mechanics course and my homework involves extremely tedious algebra to solve symbolic eigenvalue problems. I'm looking for a software that I can give matrices with symbolic ...
0
votes
1
answer
298
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Best software to fit molecular spectroscopy data
I have some data from a molecular spectroscopy experiment, containing vibrational and rotational spectra, and I want to fit the peaks with Voigt profiles (one for each peak) in order to obtain the ...
1
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1
answer
433
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Useful resources and softwares for computational astrophysics
I am recently working on computational astrophysics. My research is mainly focused on accretion processes around compact objects (black holes & neutron stars), radiative transfer and modelling of ...
0
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1
answer
141
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Is there a program or a website able to perform all Wick contractions for a given expression?
Imagine I have an expression of the type:
$$\langle \phi_{x_1} \phi_{x_1} \phi_{x_2} \phi_{x_2} \phi_{z_1} \phi_{z_1} A_{z_1} \phi_{z_2} \phi_{z_2} A_{z_2} \phi_{z_3} \phi_{z_3} A_{z_3} \phi_{z_4} \...
0
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1
answer
169
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Implementing the Hartree-Fock method in two dimensions from scratch
I am interesting in writing a complete code for the Hartree-Fock method to improve my understanding of it. It seems relatively complex in three dimensions, so I am wondering if it would be simpler in ...
0
votes
2
answers
418
views
Resource recommendation for machine learning
I am planning to change my field (in PhD) and learn Machine Learning to differentiate different phases of strongly correlated matter. I learned Monte Carlo method in my MS and have intermediate level ...
1
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0
answers
93
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Numerically Solving EM problems. Book covering: ABS, PML, Near field calcul., LU fact, BicGstab, Pardiso etc
I looking for a book (or two) covering a range of topics:
numerical implementation of
boundary conditions (PEC, PMC, ABS);
perfect matching layer;
LU factorisation;
numerical solvers and when to use ...
1
vote
1
answer
69
views
What are some useful resources for simple two-body quantum simulation?
Are there available, commercial or free, numerical packages for simulating quantum dynamics that have built-in tools especially for quantum mechanics?
For the purpose of this question, I want to ...
7
votes
1
answer
1k
views
How to code Tensor Networks?
I'm interested in learning tensor networks, I've been reading some introductory articles about this. The problem is that these articles mostly discuss the theoretical definitions for tensor networks ...
1
vote
2
answers
653
views
Numerical Tools and Related Resoures for Bohmian Mechanics
I am trying to do some simulations using the de Broglie - Bohm formalism and am wondering if there are computational tools that already exist in this area.
I generally use Python, but will consider ...
8
votes
0
answers
194
views
Visualising General Relativity [closed]
I've recently found myself with copies of both Maple and Mathematica and I'm looking to use it to study relativity and hopefully the field equations of GR.
I mainly study general relativity but I've ...
1
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0
answers
39
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Are there any public program that can calculate baryon acoustic oscillations (BAO) acoustic peak from the data Lyman alpha spectra of BOSS?
Are there any public program that can calculate baryon acoustic oscillations (BAO) acoustic peak from the data Lyman alpha spectra of Baryon Oscillation Spectroscopic Survey (BOSS)? I am confused in ...
3
votes
0
answers
85
views
Open-source code for computing response functions
Summing Feynman diagrams to compute the response functions of a microscopic model is common in many areas of physics. While conceptually straightforward, the task can be computationally intensive. ...
1
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0
answers
81
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Introduction material for lattice field simulation
I am looking for introductory material of lattice field theory simulation. It is better start from simple example (e.g. \phi^4) and include some source code. Is there any on-line or book which is ...
-1
votes
1
answer
127
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Software for calculating the trajectory of a body in a coordinate system
I'm looking for a program, which would simulate the path of motion of a body in a coordinate system, given the force acting upon the body. I'd type in the initial conditions such as the velocity, $(x,...
1
vote
0
answers
46
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New coordinates in terms of old from Jacobian-- Software? [duplicate]
Fellow geometry enthusiasts:
I am studying a particular geometry and I would like to change from one set of coordinates to a new set that makes the metric unimodular (i.e. it's determinant is one). ...