Quantum Circuit Obfuscation via Classical Compilation
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Solution Overview
Problem
Quantum computing faces challenges in maintaining the coherence time of qubits due to decoherence, leading to reduced operational time and increased errors, while also requiring rapid execution of quantum jobs to maximize system usage and minimize waiting times for users.
Innovation Solution
A system and method for obfuscating quantum circuit specifications and parameters, allowing for secure encoding and decoding of quantum control computations using a decoding key, which prevents unauthorized access and ensures secure execution on a quantum processor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If quantum jobs are executed rapidly to maximize system usage, then productivity increases, but coherence time of qubits is reduced leading to increased errors
Solution Approach 1:
The quantum circuit is divided into multiple segments or blocks, where each segment is processed separately. This allows the system to execute quantum jobs in smaller chunks rather than requiring the entire circuit to complete within a single coherence time window, thereby enabling faster overall execution while maintaining reliability within each segment.
Solution Approach 2:
The patent applies preliminary compilation and optimization of quantum circuits before execution. By pre-processing the quantum program to optimize gate sequences and reduce operation time, the system can execute jobs more rapidly while ensuring that critical operations complete within the available coherence time, thus improving both productivity and reliability.
2Reliability
If quantum circuits are obfuscated to secure information, then security improves, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary classical compilation layer that handles the obfuscation and decoding processes. Instead of implementing complex quantum obfuscation circuits, the system uses classical preprocessing to generate obfuscated quantum circuits with controlled gate counts, thereby achieving security without excessive quantum device complexity.
Solution Approach 2:
The patent controls the complexity of obfuscated quantum circuits by adjusting parameters such as the number of T gates and overall gate count. By carefully selecting these parameters, the system achieves adequate security while keeping the quantum circuit complexity within manageable limits for near-term quantum devices.
3Measurement precision
If T gate count is increased to improve measurement accuracy, then measurement precision improves, but operation time increases reducing qubit availability
Solution Approach 1:
The patent optimizes the T gate count as a controllable parameter in quantum circuit compilation. By adjusting the T gate count to an optimal value, the system achieves sufficient measurement accuracy for cryptographic applications while minimizing the operation time and preserving qubit availability for subsequent operations.
Data Source
AI summary
One or more systems, computer-implemented methods and/or computer program products provided herein relate to obfuscating an input specification of a quantum circuit, one or more gate parameters of a quantum circuit, and/or at least a portion of a quantum circuit. A system can comprise a processor, operatively coupled to a memory, wherein the processor executes the following computer executable components: an obfuscation component that encodes an original quantum control computation by introducing a specified variable into the original quantum control computation, wherein the introduction of the specified variable creates an encoded quantum control computation that is decodable by performing a quantum compiling operation on the encoded quantum control computation.