QNLP::BitGroup< SimulatorType > Class Template Reference

Class definition for bit-wise grouping in register. More...

#include <bit_group.hpp>

Collaboration diagram for QNLP::BitGroup< SimulatorType >:

Static Public Member Functions
static void	bit_group (SimulatorType &qSim, const std::vector< std::size_t > &qreg_idx, const std::vector< std::size_t > &qaux_idx, bool lsb=true)
	Swaps all qubits in register indices given by qreg_idx to their right-most positions. Method works by pairing qubits using even-odd indexed cycles iteratively until all qubits are in the correct positions. Intermediate qubit reset operation may not be realisable on all platforms (Hadarmard followed by SigmaZ projection to |0>) More...

Static Private Member Functions
static void	q_ops (SimulatorType &qSim, std::size_t qreg_idx0, std::size_t qreg_idx1, const std::vector< std::size_t > &qaux_idx)
	Swap the qubits if qreg_idx0 is set and qreg_idx1 is not. Uses Auxiliary qubits qaux_idx which are set to |10> at start and end of operations. More...
static void	bit_swap_pair (SimulatorType &qSim, const std::vector< std::size_t > &qreg_idx, const std::vector< std::size_t > &qaux_idx, bool lsb)
	Swaps all qubits in register indices given by qreg_idx to their right-most positions. Method works by pairing qubits using even-odd indexed cycles iteratively until all qubits are in the correct positions. More...

Detailed Description

template<class SimulatorType>
class QNLP::BitGroup< SimulatorType >

Class definition for bit-wise grouping in register.

Template Parameters

SimulatorType

Definition at line 25 of file bit_group.hpp.

Member Function Documentation

bit_group()

template<class SimulatorType >

static void QNLP::BitGroup< SimulatorType >::bit_group ( SimulatorType &  qSim, const std::vector< std::size_t > &  qreg_idx, const std::vector< std::size_t > &  qaux_idx, bool  lsb = true  )

inlinestatic

Swaps all qubits in register indices given by qreg_idx to their right-most positions. Method works by pairing qubits using even-odd indexed cycles iteratively until all qubits are in the correct positions. Intermediate qubit reset operation may not be realisable on all platforms (Hadarmard followed by SigmaZ projection to |0>)

Parameters

qSim	Quantum simulator object derived from SimulatorGeneral
qreg_idx	Indices of the qSim register to group to the LSB position.
qaux_idx	Indices of auxiliary qubits in qSim register in |00> state
lsb	Indicates if to shift the values to the MSB or LSB equivalent positions.

Definition at line 114 of file bit_group.hpp.

                                                                                                                                             {
            bit_swap_pair(qSim, qreg_idx, qaux_idx, lsb);
        }

References QNLP::BitGroup< SimulatorType >::bit_swap_pair().

Referenced by QNLP::SimulatorGeneral< IntelSimulator >::groupQubits(), and TEST_CASE().

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bit_swap_pair()

template<class SimulatorType >

static void QNLP::BitGroup< SimulatorType >::bit_swap_pair ( SimulatorType &  qSim, const std::vector< std::size_t > &  qreg_idx, const std::vector< std::size_t > &  qaux_idx, bool  lsb  )

inlinestaticprivate

Swaps all qubits in register indices given by qreg_idx to their right-most positions. Method works by pairing qubits using even-odd indexed cycles iteratively until all qubits are in the correct positions.

Parameters

qSim	Quantum simulator object derived from SimulatorGeneral
qreg_idx	Indices of the qSim register to group to the LSB position.
qaux_idx	Indices of auxiliary qubits in qSim register in |00> state

Definition at line 83 of file bit_group.hpp.

                                                                                                                                            {
            bool isOdd = qreg_idx.size() % 2;
            qSim.applyGateX(qaux_idx[0]);

            for(std::size_t num_steps = 0; num_steps < qreg_idx.size(); num_steps++){
                for(int i = 0; i < qreg_idx.size()-1; i+=2){
                    if(i + 1 + isOdd < qreg_idx.size()){
                        if(lsb)
                            q_ops(qSim,  qreg_idx[i + isOdd], qreg_idx[i + 1 + isOdd], qaux_idx);
                        else
                            q_ops(qSim,  qreg_idx[i + 1 + isOdd], qreg_idx[i + isOdd], qaux_idx);

                    }
                }
                isOdd = !isOdd;
            }
            qSim.applyGateX(qaux_idx[0]);
        }

References QNLP::BitGroup< SimulatorType >::q_ops().

Referenced by QNLP::BitGroup< SimulatorType >::bit_group().

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q_ops()

template<class SimulatorType >

static void QNLP::BitGroup< SimulatorType >::q_ops ( SimulatorType &  qSim, std::size_t  qreg_idx0, std::size_t  qreg_idx1, const std::vector< std::size_t > &  qaux_idx  )

inlinestaticprivate

Swap the qubits if qreg_idx0 is set and qreg_idx1 is not. Uses Auxiliary qubits qaux_idx which are set to |10> at start and end of operations.

Parameters

qSim	Quantum simulator object derived from SimulatorGeneral
qreg_idx0	Index of qubit 0 in qSim qubit register
qreg_idx1	Index of qubit 1 in qSim qubit register
qaux_idx	Indices of auxiliary qubits in qSim qubit register that are set to |10>

Definition at line 36 of file bit_group.hpp.

                                                                                                                              {

            //Swap if C0 is set and C1 is not
            qSim.applyGateCCX(qreg_idx0, qaux_idx[0], qaux_idx[1]);
            qSim.applyGateCCX(qreg_idx1, qreg_idx0, qaux_idx[1]);
            qSim.applyGateCSwap(qaux_idx[1], qreg_idx0, qreg_idx1);

            //Reset Aux gate to |0>
            qSim.applyGateH(qaux_idx[1]);
            qSim.collapseToBasisZ(qaux_idx[1], 0);
        }

Referenced by QNLP::BitGroup< SimulatorType >::bit_swap_pair().

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The documentation for this class was generated from the following file:

• /Users/mlxd/Desktop/intel-qnlp-rc2/modules/gate_ops/bit_group/bit_group.hpp