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Questions related to the application of Mathematica to problems in physics.

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4 votes
1 answer
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I want to solve the Equation 22 and generate fig 3(a) given in the paper https://arxiv.org/pdf/1812.04672. ...
Yuktak's user avatar
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1 vote
0 answers
80 views

I am trying to evaluate the Diractrace using Feyncalc package. The expression involves projection operator 'ab' which comes from completeness relation of spin 3/2 particles (Delta-). I am having some ...
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2 votes
2 answers
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I'm trying to plot the motion of a star around a black hole by using the Schwarzschild equations in 2D. I will use only r and φ equations, while the equation for t will be obtained from the energy ...
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0 answers
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Now I'm trying to solve partial differential equation by discretizing spatial coordinate. These equations are a kind of fluid equation and the fluid is annihilated at the x=0. The variables are matter ...
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2 votes
1 answer
331 views

I tried to plot the critical meniscus height of a liquid near a vertical rod (pulling upward) (radius, $r_0$) using the nondimensionalized equation (as $z=y/r_0$ and $r=x/r_0$) given in this paper, ...
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8 votes
2 answers
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Here is the function $$ I \;=\;\int_{\theta=0}^{\pi}\!\!\!\int_{\phi=0}^{2\pi} \dfrac{R^2\,\sin(\theta)\,\Bigl(\tfrac{a}{2} \;-\;R\,\sin(\theta)\,\cos(\phi)\Bigr)} {\bigl[a^2 \;-\; a\,R\,\bigl(\sin\...
kile's user avatar
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8 votes
1 answer
293 views

I am interested in Fomes Fomentarius or "Tinder Polypore" mushroom patterns (original photo, diagrams of Voronoi and Delaunay): At first it seems something simple, like a sunflower seed ...
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3 votes
2 answers
466 views

Perhaps a better title would be: "Simulating k-many Moving Points with Distance Contraints on Sphere-like Cages" because I am not concerned about representing anything physically real. This ...
Romogi's user avatar
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9 votes
1 answer
487 views

I am trying to reproduce the Fig.5 (given below) from this paper. For this, I have to solve a coupled partial differential equation. The authors of the paper use a type of finite difference method to ...
codebpr's user avatar
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5 votes
2 answers
343 views

I am trying to reproduce results from this paper, which involves solving a fourth-order differential equation. After setting the various parameters: ...
Clara Díaz Sánchez's user avatar
  • 153
3 votes
2 answers
213 views

I model the propagation of a pulsating wave. Below is a system of partial differential equations with free boundaries (Neumann conditions), as well as a pulsating component. Individual components of ...
ayr's user avatar
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3 votes
1 answer
184 views

I am trying to reproduce Figure 5 of this paper by using the following Mathematica code, which uses the method of lines for NDSolve. Unfortunately, I am not able to ...
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3 votes
2 answers
274 views

I am trying to reproduce the Figure 2 from this paper. The code that I am using to solve the differential equation is given below: ...
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9 votes
1 answer
409 views

In crystallography, the Seitz Symbol is a standard notation for describing symmetry operations in space groups. Its core idea is to decompose a symmetry operation into a combination of point ...
lotus2019's user avatar
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2 votes
1 answer
310 views

The hamiltonian $H=\sum_{i=1}^L S_i.S_{i+1}-h_iS^z$. It is a periodic $S =1/2$ Heisenberg chain in a random magnetic field, $h_i$ drawn from a uniform distribution $[−h, h]$. The ratio of consecutive ...
Yuktak's user avatar
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