Quantum components of the QCL

The QCL is started with a set number of qubits in the system. The default number of qubits is 32. Qubits are manipulated by declaring quantum registers of an arbitrary number of qubits. An operator can then be applied to the quantum register.

The QCL provides many operators for quantum registers, a few examples are provided here;

• Rot(real theta,qureg q) - Rotate a single qubit through an angle
• Mix(qureg q) - Apply a Hadamard gate to the quantum register argument
• CPhase(real phi,qureg q) - The conditional phase operator
• Swap(qureg a,qureg b) - Exchange the qubits of two registers
• Not(qureg q) - Invert a qubit

The QCL provides two non-unitary operators as well. These operators are allowed, because they destructively interfere with the machine state instead of modifying it. The first operator, measure, is the equivalent of observing a qubit. It forces the qubit in question to decompose into one of it's base states. The second operator is reset. This serves to reinitialise every qubit in the system.