public static long Calculate(long x, long n)
{
int l = n.BitsCeiling();
int t = OrderFindingTransform.GetPercision(n);
var regs = OrderFindingTransform.Registers(t, l).ToArray();
IUnitaryTransform orderfinder = OrderFindingTransform.Get(x, n, t);
var regTwo = MultiQubit.BasisVector(1, l);
var regOne = new MultiQubit(Enumerable.Range(0, t).Select(i => Qubit.ClassicZero).ToArray());
var input = new MultiQubit(regOne, regTwo);
long denom = (long)Math.Pow(2, t);
while (true)
{
QuantumSim sim = new QuantumSim(orderfinder, regs);
IDictionary <Register, long> res = sim.Simulate(input);
long regValue = res.First().Value;
// can't do anything if we get zero, cant reduce
if (regValue == 0)
{
continue;
}
foreach (var(_, rCandidate) in FractionHelpers.GetContinuedFractionSequence(regValue, denom))
{
if ((long)Math.Pow(x, rCandidate) % n == 1)
{
return(rCandidate);
}
}
}
}
public static long Find(bool[] blackBoxFunc)
{
long numStates = blackBoxFunc.LongLength;
int numQubits = numStates.BitsCeiling();
var input = new MultiQubit(Enumerable.Range(0, numQubits).Select(i => Qubit.ClassicZero).ToArray());
var reg = new QuantumStateExt.Register {
QubitIndexes = Enumerable.Range(0, numQubits)
};
var grover = GetGroverTransform(blackBoxFunc);
var sim = new QuantumSim(grover, reg);
while (true)
{
long res = sim.Simulate(input)[reg];
if (blackBoxFunc[res])
{
return(res);
}
}
}
