File su2generators.h

File List > algebra > su2algebra > su2generators.h

Go to the documentation of this file

#ifndef COSMOINTERFACE_SU2ALGEBRA_PAULIMATRICES_H
#define COSMOINTERFACE_SU2ALGEBRA_PAULIMATRICES_H

/* This file is part of TempLat, available at https://cosmolattice.github.io/templat .
   Copyright 2021-2026 The TempLat authors, see AUTHORS.md.
   Released under the MIT license, see LICENSE.md. */

// File info: Main contributor(s): Adrien Florio, Year: 2019

#include "TempLat/util/rangeiteration/tagliteral.h"
#include "TempLat/lattice/algebra/constants/zerotype.h"
#include "TempLat/lattice/algebra/constants/onetype.h"

#include "TempLat/parallel/device.h"

namespace TempLat
{
  namespace Constants
  {
    struct Sigma0 {
      DEVICE_INLINE_FUNCTION
      static constexpr OneType SU2Get(Tag<0> t) { return {}; }
      DEVICE_INLINE_FUNCTION
      static constexpr ZeroType SU2Get(Tag<1> t) { return {}; }
      DEVICE_INLINE_FUNCTION
      static constexpr ZeroType SU2Get(Tag<2> t) { return {}; }
      DEVICE_INLINE_FUNCTION
      static constexpr ZeroType SU2Get(Tag<3> t) { return {}; }

      static std::string toString() { return "Id"; }
      static constexpr size_t size = 4;
    };
    constexpr Sigma0 sigma0;

    struct Sigma1 {
      static constexpr ZeroType SU2Get(Tag<0> t) { return {}; }
      DEVICE_INLINE_FUNCTION
      static constexpr OneType SU2Get(Tag<1> t) { return {}; }
      DEVICE_INLINE_FUNCTION
      static constexpr ZeroType SU2Get(Tag<2> t) { return {}; }
      DEVICE_INLINE_FUNCTION
      static constexpr ZeroType SU2Get(Tag<3> t) { return {}; }

      static std::string toString() { return "i\u03C3_1"; }
      static constexpr size_t size = 4;
    };
    constexpr Sigma1 sigma1;

    struct Sigma2 {
      DEVICE_INLINE_FUNCTION
      static constexpr ZeroType SU2Get(Tag<0> t) { return {}; }
      DEVICE_INLINE_FUNCTION
      static constexpr ZeroType SU2Get(Tag<1> t) { return {}; }
      DEVICE_INLINE_FUNCTION
      static constexpr OneType SU2Get(Tag<2> t) { return {}; }
      DEVICE_INLINE_FUNCTION
      static constexpr ZeroType SU2Get(Tag<3> t) { return {}; }

      static std::string toString() { return "i\u03C3_2"; }
      static constexpr size_t size = 4;
    };
    constexpr Sigma2 sigma2;

    struct Sigma3 {
      DEVICE_INLINE_FUNCTION
      static constexpr ZeroType SU2Get(Tag<0> t) { return {}; }
      DEVICE_INLINE_FUNCTION
      static constexpr ZeroType SU2Get(Tag<1> t) { return {}; }
      DEVICE_INLINE_FUNCTION
      static constexpr ZeroType SU2Get(Tag<2> t) { return {}; }
      DEVICE_INLINE_FUNCTION
      static constexpr OneType SU2Get(Tag<3> t) { return {}; }

      static std::string toString() { return "i\u03C3_3"; }
      static constexpr size_t size = 4;
    };
    constexpr Sigma3 sigma3;

    DEVICE_INLINE_FUNCTION
    constexpr Sigma0 i_sigma(Tag<0> t) { return sigma0; }
    DEVICE_INLINE_FUNCTION
    constexpr Sigma1 i_sigma(Tag<1> t) { return sigma1; }
    DEVICE_INLINE_FUNCTION
    constexpr Sigma2 i_sigma(Tag<2> t) { return sigma2; }
    DEVICE_INLINE_FUNCTION
    constexpr Sigma3 i_sigma(Tag<3> t) { return sigma3; }
  }; // namespace Constants
} // namespace TempLat

#endif