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Questions tagged [software]

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0
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0answers
22 views

Ball collison in 2D in Java

For a course in my university the final project is basically making a program with java that simulates some particles moving in a 2D frame.We should consider that the collision may not be completely ...
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0answers
29 views

Simulating Earth's Atmosphere [on hold]

Is there any general purpose open source software currently available that can simulate Earth's atmosphere?
-1
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0answers
15 views

Focus sound using a regular speaker [closed]

Can I create sound beam or focus sound using a regular speaker? Or Is there a software or a mobile application that can do so?
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1answer
36 views

Mimicking the behavior of a current loop using a finite number of infinitely small sources [on hold]

I am attempting to model the field produced by either a loop of current, or a magnetic moment. In either case I am assuming that the distances I care about are sufficiently far from the source to not ...
0
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0answers
24 views

Is there a mass spectrometer software that can measure the mass of a hydrogen atom [duplicate]

For a school project I need to measure the mass of a hydrogen atom either as a lab experiment or with a computer simulation. Since I don't have the appropriate equipment for the experiment, does ...
0
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0answers
42 views

Is there a mass spectrometer software that can measure the mass of a proton

I spent a lot of hours looking for mass spectrometer software (or Cathode-ray simulator) that can measure the mass of a proton or any sub atomic particle. Until now I only found software that work on ...
1
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2answers
117 views

Implementing a spherical pendulum

I am trying to implement a spherical pendulum. The Lagrangian (which I haven't fully understood so yet) based on $l$, θ and φ taken from this page result in the equations: \begin{align} \...
1
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0answers
66 views

Why does conservation of energy appear to be violated? [closed]

I am currently working on a rigid body simulator. Before getting proper collision and rotations working, I decided to simulate the collision of spheres as axis-aligned objects. The simulation works ...
0
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1answer
43 views

Is there a general algorithm for conversion of units?

I'm not exactly sure where the best place to put this, as it's more of a general question about dimensional analysis. I decided I was tired of having to convert units all of the time, and was not ...
1
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0answers
44 views

Collision response with spring physics in RK4

I'm trying to figure out what's in the title. I've gotten regular spring physics working and now I'm trying to do something similar with actual collisions (player character colliding with the ground ...
0
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0answers
24 views

Where can I find an interactive vector field?

Imagine a low-pressure system as a vacuum that sucks all the surrounding air straight towards it, creating many vectors of wind that all focus on one spot. Because of the Coriolis effect, each of ...
0
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2answers
46 views

How to animate a ball rolling down an incline?

I'm using Lagrangian mechanics to come up with the equations of motion for a ball rolling down an incline. I've come up with the following two equations. $$\begin{alignat}{1} \dot{x} &= \frac{2}{...
2
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1answer
52 views

Visually and physically reasonable analytic approximation to the field of a bar magnet

I want to produce publication-quality drawings of the field of a bar magnet, in both the field line representation and as a "sea of arrows." I've found some open-source software that looks like it ...
1
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1answer
95 views

Weird results of Monte Carlo simulation

I'm simulating the 3D Ising Model using the Wolff update algorithm. I am using the Mersenne Twister RNG. When the lattice size is $L = 50$, the specific heat curve looks very weird!! I want to ...
2
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0answers
72 views

Is there an alternative to SIMION?

Is anyone aware of an alternative, possibly open-source, to the SIMION software? From their website: SIMION is a particle optics simulation software primarily used to calculate electric fields ...
1
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0answers
47 views

COMSOL magnetic field time dependent [closed]

enter image description here I need to modelling conductor in Comsol 5.3 by MF physics in Time Dependent study Conductor model "Single conductor" in "Coil" feature doesn't work in TD study, and ...
3
votes
1answer
55 views

Laplace's heat equation equilibrium functions

I simulated the Laplace's heat equation on a grid (200x200) with boundary conditions of 0 (a cold source) on the top and left and 1 (of hot source) on the bottom and right. (see gif) I stopped ...
1
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1answer
50 views

How to improve this simple Brownian motion simulation by adding viscosity?

I've written a 0th order Brownian motion simulator to envision how a particle of smoke might appear to move under a microscope. There will be missing $\sqrt{2}$'s and $\frac{\pi}{2}$'s since I haven'...
5
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3answers
243 views

Extracting the 3D coordinates of a moving object from a video

Take a look at these two pictures, which are stills from a video which demonstrates magnus effect in football: I want to extract the coordinates of this ball in 3D space from this video. These are ...
2
votes
1answer
85 views

Relation between curvature in orthonormal basis and in “standard” metric form

Im familiar with both formulations of GR - standard with metric and connection coefficients and that based on orthonormal frames and differential forms (Cartan's structure eqns) in solving Einstein's ...
0
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0answers
37 views

Generalized Wick's Theorem - Program

I need to compute products of normal ordered one, two and three body anihilation and creation operators like: $\boldsymbol{\tilde{a}}^p_q$ $\cdot$ $\boldsymbol{\tilde{a}}^{rtv}_{suw}$ For that, I ...
12
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3answers
1k views

Does quantum mechanics allow you to simulate chemical reactions in software?

I'm a software developer interested in learning quantum mechanics to simulate chemistry. I know it's a very difficult topic, so I consider it a long term "someday/maybe" goal, and I’m not sure it's ...
1
vote
1answer
99 views

Tensor Product Explanation

I'm currently doing a research project involving 3 particle spins and have developed a simple function for the Hamiltonian: I understand how to code my work but the physics behind it is unfamiliar ...
2
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0answers
51 views

Latex tool for Feynman diagrams [duplicate]

Is there a tool for drawing Feynman diagrams that can be used to post these diagrams on physics stack exchange?
0
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1answer
71 views

How to undo or reverse a Kronecker product (tensor product) in QuTiP? [duplicate]

Let's say I have a qubit. A qubit is described by the two basis state $$|0\rangle= \begin{pmatrix} 1\\0 \end{pmatrix} \quad\text{and}\quad \ |1\rangle= \begin{pmatrix} 0\\1 \end{pmatrix}. $$ So a ...
2
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0answers
49 views

Barkana & Loeb's Virial Radius Plot [closed]

Recently I have been trying to teach myself the basics of modern cosmology. To do so I have been using Barkana & Loeb. I've been working my way through and come to virial radius. They give the ...
1
vote
1answer
32 views

File with particle decay data [closed]

Does anyone know of a computer parsable file that has basic physics and decay data for (quite many) observable particles, such as mesons, barions, heavy leptons and $W, Z, H$? To clarify the data I ...
1
vote
2answers
176 views

Is kinematics required to solve for the quaternion dynamics of a tumbling body?

I'm trying to solve for the rotational motion of a rigid body in the absence of external torques using quaternions in MATLAB. Assuming the axis of rotation as the unit vector $\begin{bmatrix}a_x & ...
0
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0answers
88 views

FFT for data sets without any well defined frequency

I am trying to implement FFT algorithm on a data (density of particles) to obtain structure factor. The problem is that in MATLAB (and probably any DFT algorithm which is out there) the assumption is ...
-1
votes
1answer
17 views

How to plot a vector field? [closed]

I am reading articles of vector fields, such as magnetic field and sound field. I am very curious about how the vector fields are drawn, such as the pictures shown below. Any reference to this ...
0
votes
1answer
61 views

Bouncing ball with friction

I am trying to write freefem code (same language as c++) for a bouncing ball, but i am not able to notice the result of friction force. At each time the rigid ball hits the rigid ground , the ...
2
votes
0answers
79 views

Seismology - PPV / VDV from geophone waveform data

I'm using an inexpensive seismometer to try and measure the effects of local HGV traffic on buildings. The device is connected to a Raspberry PI that has a Cirrus Logic Audio Card. The signal is fed ...
0
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0answers
74 views

Action describing a scalar field in a classical curved background

Been trying to derive equation (6.54) in Quantum Fields in Curved Space by N.D. Birrell & P.C.W. Davies (p. 162): \begin{align} ^{(2)}H_{\mu\nu} &\equiv \frac{1}{(-g)^{1/2}}\frac{\delta}{\...
0
votes
1answer
39 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
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0answers
26 views

Obtaining ground state using Davidson algorithm

I want to compute the ground state of a Hamiltonian using Davidson Algorithm. I have written some code in python that I assume works alright. My problem is this: The dimension of the ground state ...
0
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0answers
24 views

Determining the sign (+/-) of the total work done on separating two molecules along a certain distance - AMBER16

I am currently moving two sugar molecules apart and would like to analyse the work done on separating them (and thus moving them apart from a distance of 3.5 Å to 30 Å). The values I am given by this ...
0
votes
1answer
28 views

How do I calculate the wavenumbers for a Broadband CARS system?

I had the question when I was reading a paper by Camp (High-Speed Coherent Raman Fingerprint Imaging of Biological Tissues), and I've been researching how to calculate wavenumbers from the 4 wave ...
2
votes
1answer
81 views

Which program to analyse and graph laboratory measurements?

I'm interested in which program would you recommend for drawing graphs with x and y errors. Also to be able to analyse data and then graph it. My ideal graph would look like this: Until now I was ...
1
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3answers
65 views

Resource required for learning simulations in physics

I know basic programming in C and Fortran. I want to learn simple simulations in physics to have some idea about it. Right now I don't have any idea about it. Can someone refer some online/offline ...
2
votes
4answers
113 views

Nuclear Physics Modeling Software

I have a nuclear reactor design I would like to model. I would like to show the individual atoms and how they interact with each other in the reactor (specifically, I would like to model decay modes, ...
0
votes
1answer
28 views

How to change speed based on gravity, and angle of movement?

I am making a simple coding project where a white dot is orbiting another dot. I could not find a mathematical formula to change the speed of the dot based on its movement direction proportional to ...
0
votes
1answer
107 views

Computer Simulation of Elastic collision

I am trying to calculate the collision of 2 balls of equal mass, assuming the collision is perfectly elastic, for a computer physics simulation. Given the coordinates of both balls and their initial ...
2
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0answers
58 views

How to define a non-uniform mangetic field in Geant4 simulation?

I am getting stuck in creating a gradient magnetic field by Fieldmap method in example of field04 (geant4/extend/field/field04). At the moment, I am doing OK with creating a uniform one by creating a ...
0
votes
1answer
45 views

Discontinuity in Fourier sine series for vibrating string

In physics class we learned that any string vibration with two fixed endpoints can be written as a superposition of normal modes, where the shape of each normal mode is given by $y(x)=A_n\sin(nx)$. As ...
0
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0answers
29 views

Software/App for vectorial diagram creation [duplicate]

newbie here. I have been searching for a software/app to aid the creation of vectorial diagrams, such as circular motion, showing unity vectors on cartesian and polar coordinates, but didn't find any. ...
2
votes
0answers
31 views

Software that can perform QMC on quantum Ising model

I'm trying to find a software that can perform QMC using the loop algorithm as outlined in the following lecture notes: https://www.cond-mat.de/events/correl13/manuscripts/wessel.pdf The closest ...
2
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0answers
146 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 ...
0
votes
1answer
44 views

Collider physics; what is a jet residual?

I'm looking at a list of jet parameters (in a .root file). One of them is called JetResidual. It's there alongside parameters like ...
1
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2answers
75 views

Software for simulating gas of hard particles (i.e. polyhedra?)

I was wondering if there existed a kind of software I could use to simulate a gas of polyhedra, such as tetrahedra. They would interact through entropic interactions only, i.e. excluded volume. I'm ...
-1
votes
1answer
60 views

What is wrong with my model of aerodynamic drag?

I am creating a JavaScript program which simulates fireworks in a 2-dimentional context launching from the ground and exploding somewhere in mid-air. The program takes into account gravity and drag, ...