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- /**********************************************************
-
- This software is part of J.-S. Caux's ABACUS library.
-
- Copyright (c) J.-S. Caux.
-
- -----------------------------------------------------------
-
- File: LiebLin_DSF_tester.cc
-
- Purpose: allows for Ix2 manipulations (user-prompted) for LiebLin gas
-
- ***********************************************************/
-
- #include "ABACUS.h"
-
- using namespace std;
- using namespace ABACUS;
-
-
- int main(int argc, char* argv[])
- {
-
- if (argc != 8) { // provide some info
-
- cout << endl << "Welcome to ABACUS\t(copyright J.-S. Caux)." << endl;
- cout << endl << "Usage of LiebLin_DSF_tester executable: " << endl;
- cout << endl << "Provide the following arguments:" << endl << endl;
- cout << "char whichDSF \t\t Which structure factor should be calculated ? Options are: d for rho rho, g for psi psi{dagger}, o for psi{dagger} psi" << endl;
- cout << "DP c_int \t\t Value of the interaction parameter: use positive real values only" << endl;
- cout << "DP L \t\t\t Length of the system: use positive real values only" << endl;
- cout << "int N \t\t\t Number of particles: use positive integer values only" << endl;
- cout << "int Nl \t\t\t Number of particles in left Fermi sea (Nr is then N - Nl)" << endl;
- cout << "int DIl \t\t shift of left sea as compared to its ground state position" << endl;
- cout << "int DIr \t\t shift of right sea as compared to its ground state position" << endl;
- }
-
- else { // (argc == 6), correct nr of arguments
- char whichDSF = *argv[1];
- DP c_int = atof(argv[2]);
- DP L = atof(argv[3]);
- int N = atoi(argv[4]);
- int Nl = atoi(argv[5]);
- //int Nr = N - Nl;
- int DIl = atoi(argv[6]);
- int DIr = atoi(argv[7]);
-
- if (whichDSF != 'd') ABACUSerror("Other options not implemented yet in LiebLin_Moses_tester");
-
- // Define the Moses state:
- LiebLin_Bethe_State MosesState (c_int, L, N);
-
- // Split the sea:
- for (int i = 0; i < Nl; ++i) MosesState.Ix2[i] -= 2 * DIl;
- for (int i = Nl; i < N; ++i) MosesState.Ix2[i] += 2 * DIr;
-
- MosesState.Compute_All (true);
-
- LiebLin_Bethe_State estate = MosesState;
- cout << MosesState;
-
- int Ix2old, Ix2new;
- int again = 0;
- do {
- cout << "Substitute Ix2: which for which ?" << endl;
- cin >> Ix2old >> Ix2new;
- for (int i = 0; i < estate.N; ++i) if (estate.Ix2[i] == Ix2old) estate.Ix2[i] = Ix2new;
- estate.Compute_All(false);
- cout << estate;
- cout << setprecision(16) << "omega = " << estate.E - MosesState.E << "\t" << exp(real(ln_Density_ME(MosesState, estate))) << endl;
- cout << "Another try ? (0 == no)" << endl;
- cin >> again;
- } while (again != 0);
-
- }
-
- return(0);
- }
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