81 lines
3.1 KiB
C++
81 lines
3.1 KiB
C++
/**********************************************************
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This software is part of J.-S. Caux's ABACUS library.
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Copyright (c) J.-S. Caux.
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-----------------------------------------------------------
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File: LiebLin_DSF.cc
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Purpose: main function for ABACUS for LiebLin gas
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***********************************************************/
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#include "ABACUS.h"
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using namespace std;
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using namespace ABACUS;
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int main(int argc, char* argv[])
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{
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if (argc != 13) { // provide some info
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cout << endl << "Welcome to ABACUS\t(copyright J.-S. Caux)." << endl;
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cout << endl << "Usage of LiebLin_DSF_MosesState executable: " << endl;
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cout << endl << "Provide the following arguments:" << endl << endl;
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cout << "char whichDSF \t\t Which structure factor should be calculated ? Options are: "
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"d for rho rho, g for psi psi{dagger}, o for psi{dagger} psi" << endl;
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cout << "DP c_int \t\t Value of the interaction parameter: use positive real values only" << endl;
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cout << "DP L \t\t\t Length of the system: use positive real values only" << endl;
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cout << "int N \t\t\t Number of particles: use positive integer values only" << endl;
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cout << "int Nl \t\t\t Number of particles in left Fermi sea (Nr is then N - Nl)" << endl;
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cout << "int DIl \t\t shift of left sea as compared to its ground state position" << endl;
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cout << "int DIr \t\t shift of right sea as compared to its ground state position" << endl;
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cout << "int iKmin" << endl << "int iKmax \t\t Min and max momentum integers to scan over: "
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"recommended values: -2*N and 2*N" << endl;
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cout << "int Max_Secs \t\t Allowed computational time: (in seconds)" << endl;
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cout << "DP target_sumrule \t sumrule saturation you're satisfied with" << endl;
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cout << "bool refine \t\t Is this a refinement of earlier calculations ? (0 == false, 1 == true)" << endl;
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cout << endl << "EXAMPLE: " << endl << endl;
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cout << "LiebLin_DSF_MosesState d 1.0 100.0 100 50 -30 20 0 200 600 1.0 0" << endl << endl;
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}
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else { // (argc == 13), correct nr of arguments
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char whichDSF = *argv[1];
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DP c_int = atof(argv[2]);
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DP L = atof(argv[3]);
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int N = atoi(argv[4]);
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int Nl = atoi(argv[5]);
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int DIl = atoi(argv[6]);
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int DIr = atoi(argv[7]);
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int iKmin = atoi(argv[8]);
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int iKmax = atoi(argv[9]);
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int Max_Secs = atoi(argv[10]);
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DP target_sumrule = atof(argv[11]);
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bool refine = (atoi(argv[12]) == 1);
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// Define the Moses state:
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LiebLin_Bethe_State MosesState (c_int, L, N);
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// Split the sea:
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for (int i = 0; i < Nl; ++i) MosesState.Ix2[i] += 2 * DIl;
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for (int i = Nl; i < N; ++i) MosesState.Ix2[i] += 2 * DIr;
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MosesState.Compute_All (true);
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// Handy default name:
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stringstream defaultScanStatename_strstream;
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defaultScanStatename_strstream << "Moses_Nl_" << Nl << "_DIl_" << DIl << "_DIr_" << DIr;
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string defaultScanStatename = defaultScanStatename_strstream.str();
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// Compute the correlation:
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Scan_LiebLin (whichDSF, MosesState, defaultScanStatename, iKmin, iKmax, Max_Secs, target_sumrule, refine);
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}
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return(0);
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}
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