portelli/Grid
1
0
Fork 0
mirror of https://github.com/paboyle/Grid.git synced 2025-06-12 20:27:06 +01:00
Code Releases Activity

try lepage term

Browse Source
This commit is contained in:
david clarke
2023-10-17 14:57:15 -06:00
parent bf4369f72d
commit 391fd9cc6a
3 changed files with 51 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
examples/Example_plaquette.cc
View File

@ -29,7 +29,6 @@ public:
// Gimpl seems to be an arbitrary class. Within this class, it is expected that certain types are
// already defined, things like Scalar and Field. This macro includes a bunch of #typedefs that
// implement this equivalence at compile time.
// WARNING: The first time you include this or take it out, the compile time will increase a lot.
INHERIT_GIMPL_TYPES(Gimpl);
// Some example Gimpls can be found in GaugeImplementations.h, at the bottom. These are in turn built
@ -53,12 +52,15 @@ public:
// U_mu_nu(x)
static void dirPlaquette(GaugeMat &plaq, const std::vector<GaugeMat> &U, const int mu, const int nu) {
// These CovShift calls seem to carry out the multiplication already. A positive shift moves the lattice
// site x_mu = 1 in the RHS to x_mu = 0 in the result.
// Calls like CovShiftForward and CovShiftBackward have 3 arguments, and they multiply together
// the first and last argument. (Second arg gives the shift direction.) The CovShiftIdentityBackward
// has meanwhile only two arguments; it just returns the shifted (adjoint since backward) link.
plaq = Gimpl::CovShiftForward(U[mu],mu,
Gimpl::CovShiftForward(U[nu],nu,
Gimpl::CovShiftBackward(U[mu],mu,
Gimpl::CovShiftIdentityBackward(U[nu], nu))));
// Means Link*Cshift(field,mu,1), arguments are Link, mu, field in that order.
Gimpl::CovShiftForward(U[nu],nu,
Gimpl::CovShiftBackward(U[mu],mu,
// This means Cshift(adj(Link), mu, -1)
Gimpl::CovShiftIdentityBackward(U[nu], nu))));
}
// tr U_mu_nu(x)