Function getIdentityMatrix

tests/deprecated/test_utilities.cpp:266–272

}

QMatrix getIdentityMatrix(size_t dim) {
    DEMAND( dim > 1 );
    QMatrix matr = getZeroMatrix(dim);
    for (size_t i=0; i<dim; i++)
        matr[i][i] = 1;
    return matr;
}

QMatrix getKetBra(QVector ket, QVector bra) {
    DEMAND( ket.size() == bra.size() );