All Questions
Tagged with algorithms simulations
14
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Force-simulation for graph layout: How to avoid particle collapsing into a single point?
In a force-based graph-layout simulation using Barnes-Hut, what are the conditions for collapse? With collapse I mean multiple (or even all) nodes "collapsing" into a single point.
Is there ...
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About how to calculate observables in Quantum Monte Carlo with complex weights
I'm rewriting a Diagrammatic Quantum Monte Carlo algorithm following Werner, P., Oka, T., & Millis, A. J. (2009). Diagrammatic Monte Carlo simulation of nonequilibrium systems. Physical Review B, ...
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What are the advantages of tensor network algorithms over monte-carlo simulations in terms of time-evolution?
I understand that tensor networks and monte carlo simulations are based on completely different principles. However, to my knowledge both are used to simulate the time evolution of a system. Is there ...
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Why are time-reversible integration algorithms in molecular dynamics simulations favorable?
I read that integration algorithms that are not time-reversible tend to be less "stable". Where stable means that the total energy stays constant (is conserved). I'd like to know what it ...
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Reference request: Numerical techniques, Monte-Carlo (MC), Density Matrix Renormalization Group (DMRG), Dynamical Mean-Field Theory (DMFT)
I am an undergraduate student and my previous learning in physics is more on theory instead of numerics. I would be very grateful if you can point me to good introductory lecture notes/lecture videos ...
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Fluid simulations on spherical coordinate grid: How to handle $\theta=0$ axis?
I am working on a fluid simulation code written in spherical coords. Whoever wrote the original didn't do a great job with the boundary conditions at $\theta=0$ and $\theta=\pi$ axes. My task is to "...
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$N$-body gravity simulator: why does energy conservation break down when introducing an adaptive timestep?
I am playing with an N-body gravity simulator using the velocity-verlet algorithm. In the actual simulation I normalize everything so that it is nicely behaved numerically, but I'll express things in ...
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Could you use the Barnes-Hut algorithm iteratively-- with multiple center quadrants?
I was wondering if you could use Barnes-Hut simulation beyond what it was originally intended to be. For many Barnes-Hut algorithms, the forces are only considered for a single quadrant, the centroid, ...
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What is order of the Wolff Cluster algorithm?
What is the order of the Wolff Cluster update algorithm for Ising Model 2D and 3D?
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1
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Markov Process in Monte Carlo simulation
I am trying to understand the detailed balance condition precisely.
To get it I went on this page : https://cs.adelaide.edu.au/~paulc/teaching/montecarlo/node22.html
It is written the following :
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How to simulate gravitational interaction of bodies in space?
I want to try simulating some bodies in space using the basic formulas I learned in my college mechanics class.
So I know Newton's Law and some basic mechanics equations:
$\vec{F} = G\frac{m_1m_2}{r^...
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hard sphere collision condition with periodic boundary conditions
Hello Stack Exchange Physics,
I am curious if there is an analytical or efficient numerical solution for the collision of hard spheres in a rectangular unit cell with periodic boundary conditions.
...
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Numerical Ising Model - Wolff algorithm and correlations
I'm doing some numerical Monte Carlo analysis on the 2 dimensional Ising model at the critical point. I was using the Metropolis 'single flip' evolution at first with success, though it suffers from ...
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Algorithm to simulate impulse response of a solid?
There are well-documented methods of calculating the impulse response of a room (ex. image method, ray-tracing method); however, I have not been able to find anything similar for the impulse response ...
