CPC G06N 10/20 (2022.01) [G06N 10/40 (2022.01); H03K 19/20 (2013.01)] | 20 Claims |
1. A method, performed by a quantum computing device, for duplicating a phased plus state, the method comprising:
performing a phase operation on a first qubit included in the quantum computing device and a second qubit included in the quantum computing device, wherein the first qubit is prepared in an arbitrary initial state and the second qubit is prepared in a plus state, comprising:
performing a first NOT operation on a third qubit included in the quantum computing device, wherein the third qubit is prepared in the phased plus state;
computing a controlled adder operation on the first, second and third qubits, comprising encoding a result of the controlled adder operation in a fourth qubit included in the quantum computing device;
performing a square of the phase operation on the fourth qubit;
uncomputing the controlled adder operation on the first, second and third qubits;
performing a CNOT operation between the first qubit and the third qubit, wherein the first qubit acts as the control;
performing a CNOT operation between the second qubit and the third qubit, wherein the second qubit acts as the control; and
performing a second NOT operation on the third qubit.
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