Microsoft patents method to cut qubit count in quantum math
Microsoft describes a technique for quantum computers to perform multiplication using fewer physical qubits. The method uses specific gate sequences and two helper qubits to combine mathematical operations more efficiently.
In the filing’s own words
Aspects of the disclosure include a procedure for operating a quantum circuit. Aspects include performing Hamiltonian block encoding with unitary evolution on a first multiplicand and a second multiplicand resulting in a first intermediate operator and a second intermediate operator, respectively. Aspects include performing first gates on the first intermediate operator and second gates on the second intermediate operator resulting in a modified first intermediate operator and a modified second intermediate operator, respectively. Aspects include performing a commutator product formula to combine the modified first intermediate operator and the modified second intermediate operator resulting in a combination operator, and performing another first gates and another second gates on the combination operator resulting in a modified combination operator. The another second gates include a conjugate transpose of the another first gates. Two ancilla qubits are utilized on the quantum circuit.
What exactly they claim (claim 1)
1. A method for a procedure for operating a quantum circuit, the method comprising: performing a Hamiltonian block encoding with unitary evolution on a first multiplicand and a second multiplicand resulting in a first intermediate operator and a second intermediate operator, respectively; performing first gates on the first intermediate operator and second gates on the second intermediate operator resulting in a modified first intermediate operator and a modified second intermediate operator, respectively; performing a commutator product formula to combine the modified first intermediate operator and the modified second intermediate operator resulting in a combination operator; and performing another first gates and another second gates on the combination operator resulting in a modified combination operator, wherein the another second gates include a conjugate transpose of the another first gates, and wherein two ancilla qubits are utilized on the quantum circuit.
Facts
- Company
- Microsoft (Microsoft Technology Licensing, LLC)
- Official title
- REDUCING QUBITS USED IN A QUANTUM COMPUTER
- Publication number
- US20260278432A1
- Application number
- 18999281
- Filed
- Dec 23, 2024
- Published
- Sep 17, 2026
- Inventors
- 2
- Claims
- 20
Classified under
G06N 10/20 Physics & computingMore from Microsoft in Chips & hardware
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.