All Questions
27 questions with no upvoted or accepted answers
5
votes
0
answers
139
views
Textbooks on algorithms for the perturbative calculation of High energy physics
For the perturbative calculation of High energy physics, I have known some packages such as FeynArts, FeynCalc, MadGraph, CompHEP, GiNaC, and so on. But I am wondering whether there exists a textbook ...
4
votes
0
answers
131
views
Computer coding of Perdew Burke and Ernzerhof (PBE) method
I have been assigned the task to write a computer code to implement the Perdew Burke and Ernzerhof (PBE) method. Does anyone know a good reference which can make the coding of this method easier?
3
votes
0
answers
118
views
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 ...
3
votes
0
answers
148
views
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 ...
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. ...
2
votes
0
answers
64
views
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 ...
2
votes
0
answers
148
views
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 ...
2
votes
0
answers
71
views
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 /...
1
vote
0
answers
45
views
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 ...
1
vote
0
answers
100
views
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 ...
1
vote
0
answers
60
views
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 ...
1
vote
0
answers
93
views
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
0
answers
39
views
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 ...
1
vote
0
answers
81
views
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
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 ...
0
votes
0
answers
60
views
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 ...
0
votes
0
answers
222
views
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. ...
0
votes
0
answers
89
views
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 ...
0
votes
0
answers
117
views
Wick's contractions
According to Wick's theorem, we have
$${\left\langle {T\left[ {\hat A\hat B\hat C\hat D} \right]} \right\rangle _0} = {\left\langle {T\left[ {\hat A\hat B} \right]} \right\rangle _0}{\left\langle {T\...
0
votes
1
answer
159
views
Program to generate graph of spring-mass-damper system
For a school project, I've been researching mass-spring-damper systems. For this I did an experiment in which I basically filmed a spring with a mass attached to it that went up and down and ...
0
votes
0
answers
67
views
Automated symbolic commutator tool
Is there a software tool (perhaps Mathematica extension?) designed to help with doing algebraic manipulations of non-commutative objects? Specifically, what I'm after is an interface along the lines ...
0
votes
0
answers
33
views
Except for COMSOL Multiphysics, what is the dedicated simulation tool (free version) that can simulate arrayed acoustics?
Using units and horns, we now have individual replicas. I'm trying to calculate the sound pressure level by arranging hundreds of these in a simulation 1m in front, but when I do it with COMSOL ...
0
votes
1
answer
46
views
Rate Equations for Simulation
I would like to simulate a passively Q-switched laser with MATLAB. Do you have any suggestions - or link to literature/paper - which rate equations I should use? It would be nice if the equations ...
0
votes
0
answers
36
views
Looking for a freeware software/app that can solve eigenvalue problems symbolically
I'm taking a quantum mechanics course and my homework involves extremely tedious algebra to solve symbolic eigenvalue problems. I'm looking for a software that I can give matrices with symbolic ...
0
votes
1
answer
141
views
Is there a program or a website able to perform all Wick contractions for a given expression?
Imagine I have an expression of the type:
$$\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
votes
1
answer
169
views
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 ...