Hybrid Classical-Quantum Variational Autoencoder for Neural Topic Modeling
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Computer Science > Computation and Language
arXiv:2606.13852 (cs)
[Submitted on 11 Jun 2026]
Title:Hybrid Classical-Quantum Variational Autoencoder for Neural Topic Modeling
Authors:Ivan Kankeu
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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.
| Subjects: | Computation and Language (cs.CL) |
| Cite as: | arXiv:2606.13852 [cs.CL] |
| (or arXiv:2606.13852v1 [cs.CL] for this version) | |
| https://doi.org/10.48550/arXiv.2606.13852
arXiv-issued DOI via DataCite (pending registration)
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View a PDF of the paper titled Hybrid Classical-Quantum Variational Autoencoder for Neural Topic Modeling, by Ivan Kankeu
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