Shallow Depth Factoring Based on Quantum Feasibility Labeling and Variational Quantum Search

• URL: http://arxiv.org/abs/2305.19542v2
• Date: Sun, 22 Oct 2023 02:42:52 GMT
• Title: Shallow Depth Factoring Based on Quantum Feasibility Labeling and Variational Quantum Search
• Authors: Imran Khan Tutul, Sara Karimi, Mohammadreza Soltaninia, Junpeng Zhan
• Abstract summary: Large integer factorization is a prominent research challenge, particularly in the context of quantum computing. We propose a new quantum algorithm, Shallow Depth Factoring (SDF), to factor a biprime integer.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Large integer factorization is a prominent research challenge, particularly in the context of quantum computing. This holds significant importance, especially in information security that relies on public key cryptosystems. The classical computation of prime factors for an integer has exponential time complexity. Quantum computing offers the potential for significantly faster computational processes compared to classical processors. In this paper, we propose a new quantum algorithm, Shallow Depth Factoring (SDF), to factor a biprime integer. SDF consists of three steps. First, it converts a factoring problem to an optimization problem without an objective function. Then, it uses a Quantum Feasibility Labeling (QFL) method to label every possible solution according to whether it is feasible or infeasible for the optimization problem. Finally, it employs the Variational Quantum Search (VQS) to find all feasible solutions. The SDF utilizes shallow-depth quantum circuits for efficient factorization, with the circuit depth scaling linearly as the integer to be factorized increases. Through minimizing the number of gates in the circuit, the algorithm enhances feasibility and reduces vulnerability to errors.

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