mps-0.0.0
MatrixProductStatesinC++
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mps_expected2_all_z.cc
1 // -*- mode: c++; fill-column: 80; c-basic-offset: 2; indent-tabs-mode: nil -*-
2 /*
3  Copyright (c) 2010 Juan Jose Garcia Ripoll
4 
5  Tensor is free software; you can redistribute it and/or modify it
6  under the terms of the GNU Library General Public License as published
7  by the Free Software Foundation; either version 2 of the License, or
8  (at your option) any later version.
9 
10  This program is distributed in the hope that it will be useful,
11  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  GNU Library General Public License for more details.
14 
15  You should have received a copy of the GNU General Public License along
16  with this program; if not, write to the Free Software Foundation, Inc.,
17  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19 
20 #include <mps/mps.h>
21 #include "mps_expected2_all.cc"
22 
23 namespace mps {
24 
25  using namespace tensor;
26 
27  CTensor expected(const CMPS &a, const std::vector<CTensor> &op1, const std::vector<CTensor> &op2)
28  {
29  return all_correlations_fast(a, op1, op2, a);
30  }
31 
32  CTensor expected(const CMPS &a, const CTensor &op1, const CTensor &op2)
33  {
34  index L = a.size();
35  std::vector<CTensor> vec1(L, op1);
36  std::vector<CTensor> vec2(L, op2);
37  return all_correlations_fast(a, vec1, vec2, a);
38  }
39 
40 } // namespace mps
Real matrix product structure.
Definition: cmps.h:31
double expected(const RMPS &psi, const Hamiltonian &H, double t)
Expected value of a Hamiltonian over a matrix product state.