Quantum Circuit Runtime Assertion Using Zero-Amplitude States
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Solution Overview
Problem
Conventional runtime assertion methods for quantum circuits lack flexibility in verifying quantum states and are limited to specific cases, failing to provide general verification.
Innovation Solution
A quantum circuit structure and method that utilizes a first ancilla qubit to detect errors based on a zero-amplitude set, dividing the circuit into sections with an assertion circuit to indicate errors, and adjusting the assertion circuit's size for different error detection rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional runtime assertion methods are used to verify quantum circuits, then specific quantum states can be asserted, but the flexibility and generality of verification are limited
Solution Approach 1:
The patent applies universality by creating a general-purpose assertion framework that can verify any quantum circuit state, not just specific predefined states. The vanishing-state-based assertion circuit serves as a universal verification mechanism that adapts to different quantum circuits and error types, enabling flexible yet comprehensive verification across diverse quantum computing scenarios.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the assertion circuit configuration based on the zero-amplitude set of the target quantum circuit. The verification parameters (such as the assertion threshold and circuit depth) can be modified to balance between verification comprehensiveness and resource consumption, allowing flexible adaptation to different verification requirements.
2Reliability
If assertion circuits are added to quantum circuits for runtime verification, then error detection capability is improved, but circuit complexity and resource consumption increase
Solution Approach 1:
The patent introduces an intermediary assertion circuit that mediates between the main quantum circuit and the verification process. This assertion circuit acts as a bridge that monitors quantum states without significantly interfering with the main circuit's operation, enabling error detection while maintaining relatively simple integration with the original quantum circuit.
Solution Approach 2:
The patent applies preliminary action by pre-calculating the zero-amplitude set of the quantum circuit before runtime verification. This preprocessing step allows the assertion circuit to be configured in advance with the correct verification parameters, eliminating the need for complex real-time calculations during circuit execution and reducing overall system complexity.
3Reliability
If runtime assertion is implemented in quantum circuits, then verification can be performed during execution, but additional time and resources are consumed
Solution Approach 1:
The patent performs preliminary calculation of the zero-amplitude set and assertion circuit configuration before quantum circuit execution. This preprocessing eliminates the need for complex real-time verification calculations, allowing the assertion circuit to operate efficiently during runtime with minimal time overhead while maintaining accurate error detection.
Solution Approach 2:
The patent implements partial verification by focusing the assertion circuit on detecting specific error types (those that would change zero-amplitude states) rather than performing complete state verification. This selective approach provides sufficient reliability for runtime verification while significantly reducing the time and computational resources required compared to full state verification.
Data Source
AI summary
A method for performing quantum computing on a quantum system using a quantum circuit with runtime assertion is provided. The quantum system includes a set of main qubits and a first ancilla qubit. A first circuit section of the quantum circuit changes the main qubits from an initial state to a first state. An assertion circuit detects whether the first state is erroneous based on a zero-amplitude set, and uses the first ancilla qubit to indicate a result of detecting whether the first state is erroneous, where the zero-amplitude set includes a set of predefined zero-amplitude state components. A second circuit section of the quantum circuit changes the main qubits from the first state to a second state when the first ancilla qubit indicates that the first state is not erroneous.