boltzmann_table.hpp File Reference

Boltzmann acceptance probability helpers for Metropolis MCMC. More...

#include <cmath>
#include <vector>

Go to the source code of this file.

Namespaces
namespace	num
namespace	num::markov

Functions
double	num::markov::boltzmann_accept (double dE, double beta) noexcept
	Metropolis acceptance probability min(1, exp(-β ΔE)).
std::vector< double >	num::markov::make_boltzmann_table (const std::vector< double > &dEs, double beta)
	Precompute a table of acceptance probabilities for a discrete set of dE values.

Detailed Description

Boltzmann acceptance probability helpers for Metropolis MCMC.

boltzmann_accept(dE, beta) – min(1, exp(-β ΔE)) inline, branch-free exp make_boltzmann_table(dEs, β) – precompute table for a discrete ΔE set

Typical usage (Ising model):

// Replace: boltz[si][ni] = (dE <= 0) ? 1.0 : exp(-beta*dE)
boltz[si][ni] = num::markov::boltzmann_accept(dE, beta);

Definition in file boltzmann_table.hpp.