QNLP::QFT< SimulatorType > Class Template Reference

Class definition for performing quantum forward and inverse Fourier transforms. More...

#include <qft.hpp>

Collaboration diagram for QNLP::QFT< SimulatorType >:

Static Public Member Functions
static void	applyQFT (SimulatorType &qSim, const unsigned int minIdx, const unsigned int maxIdx)
	Applies the forward QFT on the given register. More...
static void	applyIQFT (SimulatorType &qSim, const unsigned int minIdx, const unsigned int maxIdx)
	Applies the inverse QFT on the given register. More...

Detailed Description

template<class SimulatorType>
class QNLP::QFT< SimulatorType >

Class definition for performing quantum forward and inverse Fourier transforms.

Template Parameters

SimulatorType

Class Simulator type

Definition at line 23 of file qft.hpp.

Member Function Documentation

applyIQFT()

template<class SimulatorType >

static void QNLP::QFT< SimulatorType >::applyIQFT ( SimulatorType &  qSim, const unsigned int  minIdx, const unsigned int  maxIdx  )

inlinestatic

Applies the inverse QFT on the given register.

Parameters

qSim	The qubit register
minIdx	the lower-bounded index in the register to transform
maxIdx	the upper-bounded index in the register to transform

Definition at line 55 of file qft.hpp.

                                                                                                        {
            double theta=0;
            qSim.InvertRegister(minIdx, maxIdx);

            //Target lines
            for(int i = minIdx; i <= (int) maxIdx; i++){

                //Control lines:
                for(int j = minIdx; j < i; j++){
                    theta = -2.0*M_PI / (std::size_t) (0b1<<(1+(i-j)));
                    qSim.applyGateCPhaseShift(theta, j,  i);
                }
                qSim.applyGateH( i );
            }
        }

applyQFT()

template<class SimulatorType >

static void QNLP::QFT< SimulatorType >::applyQFT ( SimulatorType &  qSim, const unsigned int  minIdx, const unsigned int  maxIdx  )

inlinestatic

Applies the forward QFT on the given register.

Parameters

qSim	The qubit register
minIdx	the lower-bounded index in the register to transform
maxIdx	the upper-bounded index in the register to transform

Definition at line 32 of file qft.hpp.

                                                                                                       {
            double theta=0;

            //target lines
            for(int i = maxIdx; i >= (int) minIdx; i--){
                qSim.applyGateH(i);

                //Control lines:
                for(int j = i-1; j >= (int) minIdx; j--){
                    theta = 2.0*M_PI / (std::size_t) (0b1<<(1+(i-j)));
                    qSim.applyGateCPhaseShift(theta, j,  i);
                }
            }
            qSim.InvertRegister(minIdx, maxIdx);
        }

---

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

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