Controllable quantum logic gates and methods for use therewith
AssigneeBEIT Inc.
InventorAdam Szady
Life of this patent
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Abstract
A controlled quantum logic gate implements a replacement for an n−1 qubit controlled X gate function to n qubits, wherein n is greater than 4. The quantum logic gate includes a controlled gate or controlled Z gate equivalent that selectively applies, under control of a first subset of the n qubits, a pi radian Z-axis Bloch sphere rotation or a phase flip to a target qubit of the n qubits. A pair of controlled Hadamard gates selectively conjugate the target qubit under control of a second subset of the n qubits.
Claims20
A controlled quantum logic gate that implements a replacement for an n−1 qubit controlled X gate function to n qubits, wherein n is greater than 4, the quantum logic gate comprising:
- a controlled gate that selectively applies, under control of a first subset of the n qubits, a pi radian Z-axis Bloch sphere rotation to a target qubit of the n qubits;
- and
- a pair of controlled Hadamard gates that selectively conjugate the target qubit under control of a second subset of the n qubits.
A method for implementing a replacement for an n−1 qubit controlled X gate function on n qubits, wherein n is greater than 4, the method comprising:
- selectively applying, under control of a first subset of the n qubits, a pi radian Z-axis Bloch sphere rotation to a target qubit of the n qubits;
- and
- selectively conjugating, via a pair of Hadamard gates, the target qubit under control of a second subset of the n qubits.
A controlled quantum logic gate that implements a replacement for an n−1 qubit controlled Z gate function to n qubits, wherein n is greater than 3, the quantum logic gate comprising:
- a controlled Z gate equivalent that selectively applies, under control of a subset of the n qubits, a phase flip to a target qubit of the n qubits;
- and
- a pair of controlled Hadamard gates that selectively conjugate the target qubit under control of an additional one of the n qubits.
Dependencies are inferred from the claim text.