Method initState

Core/VirtualQuantumProcessor/CPUImplQPUSingleThread.cpp:224–276

}

QError CPUImplQPUSingleThread::initState(size_t qubit_num, const QStat &state)
{
    init_qubit2stat.clear();

    if (!state.empty())
    {
        double probs = .0;
        for (auto amplitude : state)
        {
            probs += std::norm(amplitude);
        }

        if (qubit_num != (size_t)std::log2(state.size()) || std::abs(probs - 1.) > 1e-6)
        {
            QCERR("state error");
            throw std::runtime_error("state error");
        }

        init_qubit2stat.resize(qubit_num);
        for (auto i = 0; i < qubit_num; i++)
        {
            init_qubit2stat[0].qVec.push_back(i);
        }

        init_qubit2stat[0].qstate = state;
        init_qubit2stat[0].qubitnumber = 1;
        init_qubit2stat[0].enable = true;

        for (auto i = 1; i < qubit_num; i++)
        {
            init_qubit2stat[i].qVec.push_back(i);
            init_qubit2stat[i].qstate.push_back(1);
            init_qubit2stat[i].qstate.push_back(0);
            init_qubit2stat[i].qubitnumber = 1;
            init_qubit2stat[i].enable = false;
        }

    }
    else
    {
        qubit2stat.erase(qubit2stat.begin(), qubit2stat.end());
        qubit2stat.resize(qubit_num);
        for (auto i = 0; i < qubit_num; i++)
        {
            qubit2stat[i].qVec.push_back(i);
            qubit2stat[i].qstate.push_back(1);
            qubit2stat[i].qstate.push_back(0);
            qubit2stat[i].qubitnumber = 1;
        }
    }

    return qErrorNone;
}


QError CPUImplQPUSingleThread::initState(size_t head_rank, size_t rank_size, size_t qubit_num)