Hybrid Classical-Quantum Variational Autoencoder for Neural Topic Modeling
Quick Answer
This paper shows that The hybrid classical-quantum variational autoencoder (VAE) demonstrates superior performance in topic modeling, achieving a $C_v$ coherence score of 0.71 and an NPMI score of 0.20 on the AgNews dataset.
Quick Take
The hybrid classical-quantum variational autoencoder (VAE) demonstrates superior performance in topic modeling, achieving a $C_v$ coherence score of 0.71 and an NPMI score of 0.20 on the AgNews dataset. This model effectively integrates parameterized quantum circuits within a classical framework, proving viable on low-resource 10-qubit devices and outperforming state-of-the-art neural topic models.
Key Points
- Hybrid VAE integrates quantum circuits within a classical topic-word decoder.
- Achieved $C_v$ coherence score of 0.71 and NPMI score of 0.20 on AgNews.
- Outperformed state-of-the-art neural topic models while maintaining topic diversity.
- Modified Gaussian Softmax posterior allows operation on low-resource quantum devices.
- Demonstrates computational viability for quantum-enhanced topic modeling.
Paper Resources
Article Content
From source RSS / original summaryarXiv:2606. 13852v1 Announce Type: new Abstract: Neural topic models enable scalable semantic discovery, but their integration with quantum hardware remains largely unexplored. We present a proof-of-concept hybrid classical-quantum variational autoencoder (VAE) for topic modeling, embedding parameterized quantum circuits within the VAE inference network while retaining a classical topic-word decoder.
To address the resource constraints of quantum hardware, we propose a modified Gaussian Softmax posterior that decouples latent space dimensionality from the number of topics to be extracted, enabling the model to operate with a low-resource 10-qubit quantum device. On the AgNews dataset, the hybrid VAE outperforms state-of-the-art neural topic models (NTMs), reaching a $C_v$ coherence score of 0. 71 and an NPMI score of 0. 20 while preserving high topic diversity.
For comparison, we also construct a fully classical variant, which also outperforms state-of-the-art models on AgNews and exhibits clear class separation in the latent space. These results demonstrate that hybrid VAEs are computationally viable even on NISQ-era devices and represent a promising direction for quantum-enhanced topic modeling.
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