Microsoft patents quantum circuit for complex qubit operations
Microsoft describes a quantum computing circuit that performs a specific logic operation called a doubly controlled iX. The system prepares special quantum states called magic states and uses a series of local and remote measurements to execute the operation on target qubits.
In the filing’s own words
A quantum computing device including a doubly controlled iX (CCiX) circuit. The CCiX circuit may be configured to, in a preparation stage, prepare a plurality of magic states. The CCiX circuit may be further configured to receive a plurality of input qubit states including a first control qubit state, a second control qubit state, and a target qubit state. In an execution stage, the CCiX circuit may be further configured to perform a CCiX operation on the target qubit state at least in part by performing a plurality of local joint measurements. At least a subset of the plurality of local joint measurements may be performed between the plurality of magic states and a plurality of auxiliary qubits. Performing the CCiX operation may further include performing a plurality of remote joint measurements of the input qubit states and a plurality of interface qubits included among the plurality of auxiliary qubits.
What exactly they claim (claim 1)
1. A quantum computing device comprising: a doubly controlled iX (CCiX) circuit configured to: in a preparation stage, prepare a plurality of magic states; receive a plurality of input qubit states including a first control qubit state, a second control qubit state, and a target qubit state; and in an execution stage, perform a CCiX operation on the target qubit state at least in part by: performing a plurality of local joint measurements, wherein at least a subset of the plurality of local joint measurements are performed between the plurality of magic states and a plurality of auxiliary qubits; and performing a plurality of remote joint measurements of the input qubit states and a plurality of interface qubits included among the plurality of auxiliary qubits.
Facts
- Company
- Microsoft (Microsoft Technology Licensing, LLC)
- Official title
- Doubly controlled iX circuit
- Patent number
- US12737656B2
- Application number
- 17806927
- Filed
- Jun 14, 2022
- Granted
- Sep 15, 2026
- Inventors
- 4
- Claims
- 20
Classified under
G06N 10/40 Physics & computingG06F 15/82 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.