Quantum-Computering-Simulator/gates.py at master · MrPrinceRawat/Quantum-Computering-Simulator · GitHub

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from ast import Bytes
import random


class qbit:
    def __init__(self):
        self.q = [0, 0, 1]

    def rotY90(self):
        x, y, z = self.q
        # 90 deg rot on y axis
        if z == 1 and x == 0:
            self.q[0] += 1
            self.q[2] -= 1
        elif z == 0 and x == 1:
            self.q[0] -= 1
            self.q[2] -= 1
        elif z == -1 and x == 0:
            self.q[0] -= 1
            self.q[2] += 1
        elif z == 0 and x == -1:
            self.q[0] += 1
            self.q[2] += 1

    def rotX90(self):
        x, y, z = self.q
        # 90 deg rot on y axis
        if z == 1 and y == 0:
            self.q[1] += 1
            self.q[2] -= 1
        elif z == 0 and y == 1:
            self.q[1] -= 1
            self.q[2] -= 1
        elif z == -1 and y == 0:
            self.q[1] -= 1
            self.q[2] += 1
        elif z == 0 and y == -1:
            self.q[1] += 1
            self.q[2] += 1

    def rotZ90(self):
        x, y, z = self.q
        # 90 deg rot on y axis
        if x == 1 and y == 0:
            self.q[0] -= 1
            self.q[1] -= 1
        elif x == 0 and y == -1:
            self.q[0] -= 1
            self.q[1] += 1
        elif x == -1 and y == 0:
            self.q[0] += 1
            self.q[1] += 1
        elif x == 0 and y == 1:
            self.q[0] += 1
            self.q[1] -= 1

    def X(self):
        self.rotX90()
        self.rotX90()
        return self.q

    def Y(self):
        self.rotY90()
        self.rotY90()
        return self.q

    def Z(self):
        self.rotZ90()
        self.rotZ90()
        return self.q

    def getState(self):
        return self.q

    def H(self):
        self.rotY90()
        self.rotX90()
        self.rotX90()
        return self.q

    def CNOT(self, z):
        if z == 0:
            if random.randint(0, 1) == 1:
                self.X()
        elif z == -1:
            self.X()
        return

    def Measure(self):
        if self.q[-1] == 0:
            if random.randint(0, 1) == 0:
                self.q[-1] = 1
            else:
                self.q[-1] = -1
            self.q[0] = 0
        return self.q

    def reset(self):
        self.q = [0, 0, 1]


def run(s, shots, circuit):
    possibleStates = 2 ** len(s)
    print(f"{possibleStates} Possible States\n\n")
    statesFound = []
    states = []
    MeasurementHistory = []
    for _ in range(shots):
        StateChangeHistory = []
        for l, i in enumerate(circuit):
            if i[0] == "H":
                i[1].H()
            if i[0] == "X":
                i[1].X()
            if i[0] == "Y":
                i[1].Y()
            if i[0] == "Z":
                i[1].Z()
            if i[0] == "CNOT":
                i[1].CNOT(i[2].q[2])
            if i[0] == "CZ":
                i[1].H()
                i[1].CNOT(i[2].Measure()[2])
                i[1].H()
        qbitStates = []
        for i in s:
            m = i.Measure()[2]
            if m == 1:
                qbitStates.append(0)
            elif m == -1:
                qbitStates.append(1)
            elif m == 0:
                qbitStates.append(random.randint(0, 1))
            i.reset()
        MeasurementHistory.append(qbitStates)
    for i, z in enumerate(MeasurementHistory):
        if z not in states:
            statesFound.append([
                round((MeasurementHistory.count(z) / shots) * 100, 2), z])
            states.append(z)
    statesFound.sort(key=lambda x: x[0], reverse=True)
    num = int(''.join(str(e) for e in statesFound[0][1]), 2)
    for i in statesFound:
        if i[0] != 0:
            print(i)