diff options
Diffstat (limited to 'src/wolff_cgm.cpp')
| -rw-r--r-- | src/wolff_cgm.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/wolff_cgm.cpp b/src/wolff_cgm.cpp index 7613691..ec3ae36 100644 --- a/src/wolff_cgm.cpp +++ b/src/wolff_cgm.cpp @@ -75,7 +75,7 @@ int main(int argc, char *argv[]) { gsl_rng_set(r, rand_seed()); // define spin-spin coupling - std::function <double(height_t<double>, height_t<double>)> Z = [] (height_t<double> h1, height_t<double> h2) -> double { + std::function <double(const height_t<double>&, const height_t<double>&)> Z = [] (const height_t<double>& h1, const height_t<double>& h2) -> double { return -pow(h1.x - h2.x, 2); }; |