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Tag Archive for physics

Fixing the particle number of a tensor basis using the quspin package

We want to describe a system with a fixed number of particles. We model our system using the quspin package (https://quspin.github.io/QuSpin/index.html). The problem is, we havent found a way to fix the total number
of particles in our combined basis defined as “basis”:

AFM assylum research .ibw file- Data Plot

I am trying to plot data from assylum research software for AFM scanning. all files are .ibw type. I am trying it on Matlab. No matter what I do Matlab can’t open data of the Ibw files. I am using Mac Os. How to solve this issue?

Convert x and y velocity to x and y velocity relative to another point

The question I asked probably isn’t very clear, so I’ll explain. If I have an x and y velocity, where the y goes towards the bottom of the screen, and the x goes towards the right of the screen, how would I convert the x and y velocity so that the y goes from the point to the particle at hand, and the x goes at a 90 degree angle from the y? If that explanation wasn’t clear, then the reason I need to do this is so that I can minus a velocity as a particle tries to go away from a gravity source, but that source isn’t just at the bottom of the screen.