All Questions
22
questions
1
vote
2
answers
98
views
How to demonstrate the acceleration using spherical coordinates and spherical unit vectors?
I've been trying to use Mathematica to demonstrate using spherical coordinates and unit vectors the acceleration for a particle moving in a sphere. Nevertheless, I'm actually not that skilled in ...
20
votes
2
answers
1k
views
Visualizing gravity warping the fabric of spacetime
What is a stable way of creating a set of points that are attracted to a single moving point? I have tried the following:
...
- 8,778
1
vote
1
answer
102
views
Vector 3d Plotting with New Mathematica Version
Hi Used to use the old version of Mathematica back in 2020. Now the new version is updated and I am trying to run the old code in the new version. My vector plots are very different. I wonder what I ...
- 181
4
votes
1
answer
109
views
Building projection operators efficiently
The projection operator $P$ is defined in quantum mechanics as $$
P=\sum_i^n \vert\psi_i\rangle \langle \psi_i\vert, $$
where $\vert\psi_i\rangle$ is a column vector and $(\langle
\psi_i\vert=(\...
- 319
0
votes
1
answer
119
views
Empty VectorPlot3D in Magnetic Field of Solenoid
I have been trying to plot the 3D magnetic field of a solenoid, with the below expression 1:
With C, the generalised complete elliptic integral, defined as follows:
I have implemented all of this in ...
- 165
3
votes
1
answer
157
views
Calculating power series of quantum operators on kets
I am using the "Quantum" add-on package to perform some quantum mechanical calculations using SU(1,1) generators. The code that I've developed reads
...
- 1,043
0
votes
0
answers
54
views
How do I flip one of my loops of current to be in the other direction?
I'm new to Mathematica and I have two loops of current that are both going in the same direction, but I want to flip them so that they go in opposite directions... I can't figure out where I'm going ...
- 11
1
vote
2
answers
503
views
How do I display magnetic field lines in 2D/3D with a stick of current?
I'm new to Mathematica (trying it out for an electromagnetism course) and struggling with plotting magnetic field lines using a line of current. Not a torturous, not a cylinder, not a circle. A line. ...
- 11
1
vote
0
answers
84
views
LeviCivitaTensor contraction indices
My computer has problems when I try to perform a calculation with TensorContract.
In particular, with the second answer to my previous question Contracting indices ...
- 73
14
votes
1
answer
4k
views
How can I reproduce a beautiful 3D vector plot?
I am a Mathematica V8 user.
I found a very beautiful 3D vector plot on the Internet. I don't think it was created in Mathematica, but I'd like to reproduce it with Mathematica.
How to do that?
...
- 299
5
votes
2
answers
1k
views
What are current approaches for supporting Dirac notation for quantum mechanics?
I'd like to be able to use Mathematica to preform some basic quantum mechanics and quantum computation operations using Dirac's Bra-Ket notation.
I've seen several solutions to defining basic ...
- 12.9k
-1
votes
1
answer
2k
views
Working with four-vectors (4-vectors)
Given an expression
$\chi\,=\,C_{p1}\,\left[ h\,e^{- i\,p1.\,x}\,\, +\,\,h^{\dagger}\,e^{+i\,p1\,.\,x}\right]$
where $p1$ and $x$ are four-vectors; $C_{p1} = \ \frac{1}{\sqrt{(2 \pi)^3} \sqrt{2 \...
- 79
12
votes
1
answer
1k
views
multiplication of vector spaces
Original Question
Disclaimer: The question motivated by the product of Hilbert spaces which arises from separate degrees of freedom which a system might contain in quantum technical system.
Examples ...
- 601
1
vote
1
answer
1k
views
Plotting electric field of charged particle
I am trying to plot the electric field of a charged particle in (2,4). The diagram is the next:
We know:
$ \overrightarrow{E} = \frac{1}{4 \pi \epsilon_0} \frac{q'}{|\overrightarrow{R}|^2} \widehat{...
- 377
0
votes
1
answer
156
views
NDSolve and vectors [closed]
I think I can't find solution of equation below because I need use scalars, not vectors as I have tried. But I don't know how I can do express the problem with scalars. I have read Wolfram Language ...
- 573