ape_smear.h

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// -*- C++ -*-
//  $Id: ape_smear.h,v 3.1 2006-08-11 16:13:29 edwards Exp $
 
#ifndef __ape_smear__
#define __ape_smear__
 
namespace Chroma 
{
  //! Construct APE smeared links from:
  /*!
   * \ingroup smear
   *
   *
   *      x               x           \           x------x
   *      +               |            \                 |
   *      +     =     c * |     +       \                |
   *      +               |             /                |
   *      x               x            /          x------x
   *                                  /______ 
   *
   *
   * Arguments:
   *
   * where c is the smearing factor sm_fact, and projected back onto SU(Nc)
 
   * Warning: this works only for Nc = 2 and 3 !
 
   * \param u        gauge field ( Read )
   * \param u_smear  smeared gauge field ( Write )
   * \param mu       direction of smeared gauge field ( Read )
   * \param bl_level blocking level (of the u's) ( Read )
   * \param sm_fact  smearing factor ( Read )
   * \param BlkAccu  accuracy in fuzzy link projection ( Read )
   * \param BlkMax   maximum number of iterations in fuzzy link projection ( Read )
   * \param j_decay  no staple in direction j_decay ( Read )
   */
 
  void APE_Smear(const multi1d<LatticeColorMatrix>& u,
                 LatticeColorMatrix& u_smear,
                 int mu, int bl_level, 
                 const Real& sm_fact, const Real& BlkAccu, 
                 int BlkMax, int j_decay);
 
}
#endif