Quantum Long Short-term Memory with Differentiable Architecture Search

• URL: http://arxiv.org/abs/2508.14955v1
• Date: Wed, 20 Aug 2025 16:15:00 GMT
• Title: Quantum Long Short-term Memory with Differentiable Architecture Search
• Authors: Samuel Yen-Chi Chen, Prayag Tiwari,
• Abstract summary: Quantum recurrent models like QLSTM are promising for time-series prediction, NLP, and reinforcement learning.<n>We propose DiffQAS-QLSTM, an end-to-end differentiable framework that optimize both VQC parameters and architecture selection during training.<n>Our results show that DiffQAS-QLSTM consistently outperforms handcrafted baselines, achieving lower loss across diverse test settings.
• Score: 9.511240423252707
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Recent advances in quantum computing and machine learning have given rise to quantum machine learning (QML), with growing interest in learning from sequential data. Quantum recurrent models like QLSTM are promising for time-series prediction, NLP, and reinforcement learning. However, designing effective variational quantum circuits (VQCs) remains challenging and often task-specific. To address this, we propose DiffQAS-QLSTM, an end-to-end differentiable framework that optimizes both VQC parameters and architecture selection during training. Our results show that DiffQAS-QLSTM consistently outperforms handcrafted baselines, achieving lower loss across diverse test settings. This approach opens the door to scalable and adaptive quantum sequence learning.

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