/// <summary>
/// Initialise a gate by the given line code.
/// </summary>
/// <param name="code"> The line code which represents a gate. </param>
/// <returns>
/// The gate which is represented by the given line. If the given
/// line doesn't represent a valid gate or a gate which is not
/// implemented, then is null returned.
/// </returns>
private static Gate InitialiseGate(string code)
{
if (!Regex.Match(code, @"^\S+ (q[\D+],)*(q[\D])").Success || Regex.Match(code, @"^qreg\s").Success)
{
return(null);
}
string prefix = code.Split()[0].ToUpper();
List <double> numbers = Regex.Split(code, @"[^0-9\.]+").Where(x => !string.IsNullOrEmpty(x)).Select(x => Convert.ToDouble(x)).ToList();
switch (prefix)
{
case "CX": // CNOT gate
return(new CNOT((int)numbers[0], (int)numbers[1]));
case "H": // Hadamard gate
return(U3.GetHadamardGate((int)numbers[0]));
case "U3":
case "U": // U3 rotation gate
return(new U3((int)numbers[3], numbers[0], numbers[1], numbers[2], GatePart.U3));
case "RX": // Rotation over x axis
return(new U3((int)numbers[1], numbers[0], -Math.PI / 2, Math.PI / 2, GatePart.Rx));
case "RY": // Rotation over y axis
return(new U3((int)numbers[1], numbers[0], 0, 0, GatePart.Ry));
case "RZ": // Rotation over z axis
return(new U3((int)numbers[1], 0, numbers[0], 0, GatePart.Rz));
case "X": // Pauli X gate
return(new U3((int)numbers[0], Math.PI, -Math.PI / 2, Math.PI / 2, GatePart.X));
case "Y": // Pauli Y gate
return(new U3((int)numbers[0], Math.PI, 0, 0, GatePart.Y));
case "Z": // Pauli Z gate
return(new U3((int)numbers[0], 0, Math.PI, 0, GatePart.Z));
case "T": // T gate
return(new U3((int)numbers[0], 0, Math.PI / 4, 0, GatePart.T));
case "TDG": // Invers of t gate
return(new U3((int)numbers[0], 0, -Math.PI / 4, 0, GatePart.TDG));
}
return(null);
}
/// <summary>
/// See <see cref="Architecture.AddSwapGates(PhysicalCircuit, Swap)"/>.
/// </summary>
public override void AddSwapGates(PhysicalCircuit circuit, Swap swap)
{
if (HasConnection(swap.Qubit1, swap.Qubit2))
{
circuit.AddGate(new CNOT(swap.Qubit1, swap.Qubit2));
circuit.AddGate(U3.GetHadamardGate(swap.Qubit1));
circuit.AddGate(U3.GetHadamardGate(swap.Qubit2));
circuit.AddGate(new CNOT(swap.Qubit1, swap.Qubit2));
circuit.AddGate(U3.GetHadamardGate(swap.Qubit1));
circuit.AddGate(U3.GetHadamardGate(swap.Qubit2));
circuit.AddGate(new CNOT(swap.Qubit1, swap.Qubit2));
}
else
{
circuit.AddGate(new CNOT(swap.Qubit2, swap.Qubit1));
circuit.AddGate(U3.GetHadamardGate(swap.Qubit1));
circuit.AddGate(U3.GetHadamardGate(swap.Qubit2));
circuit.AddGate(new CNOT(swap.Qubit2, swap.Qubit1));
circuit.AddGate(U3.GetHadamardGate(swap.Qubit1));
circuit.AddGate(U3.GetHadamardGate(swap.Qubit2));
circuit.AddGate(new CNOT(swap.Qubit2, swap.Qubit1));
}
}