/*
* Generalized Hadamard gate
*/
public static QuantumGate HadamardGateOfLength(int registerLength)
{
if (registerLength == 1)
{
return(QuantumGate.HadamardGate);
}
else
{
return(new QuantumGate(QuantumGate.HadamardGate, QuantumGate.HadamardGateOfLength(registerLength - 1)));
}
}
/*
* Determines whether the specified quantum gate is equal to the current quantum gate
*/
public override bool Equals(object obj)
{
QuantumGate quantumGate = obj as QuantumGate;
if (quantumGate == null || this.Matrix.ColumnCount != quantumGate.Matrix.ColumnCount || this.Matrix.RowCount != quantumGate.Matrix.RowCount)
{
return(false);
}
return(this.Matrix.Equals(quantumGate.Matrix));
}
/*
* Determines whether the specified quantum gate is equal to the current quantum gate, ignoring floating-point precision issues
*/
public bool AlmostEquals(object obj)
{
QuantumGate quantumGate = obj as QuantumGate;
if (quantumGate == null || this.Matrix.ColumnCount != quantumGate.Matrix.ColumnCount || this.Matrix.RowCount != quantumGate.Matrix.RowCount)
{
return(false);
}
return(Precision.AlmostEqual <Complex>(this.Matrix, quantumGate.Matrix, 15));
}
/*
* Controlled gate
*/
public static QuantumGate ControlledGate(QuantumGate gate)
{
if (gate.Matrix.ColumnCount != 2 || gate.Matrix.RowCount != 2)
{
throw new ArgumentException("A controlled gate can only be created from a unary gate.");
}
return(new QuantumGate(new Complex[, ] {
{ 1, 0, 0, 0 },
{ 0, 1, 0, 0 },
{ 0, 0, gate.Matrix.At(0, 0), gate.Matrix.At(0, 1) },
{ 0, 0, gate.Matrix.At(1, 0), gate.Matrix.At(1, 1) },
}));
}
