Phase Frustration Induced Intrinsic Bose Glass in the Kitaev-Bose-Hubbard Model

Yi-fan Zhu; Shi-jie Yang

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arXiv · 2601.05781

Phase Frustration Induced Intrinsic Bose Glass in the Kitaev-Bose-Hubbard Model

Yi-fan Zhu·Shi-jie Yang

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Abstract

We report an intrinsic "Bubble Phase" in the two-dimensional Kitaev-Bose-Hubbard model, driven purely by phase frustration between complex hopping and anisotropic pairing. By combining Inhomogeneous Gutzwiller Mean-Field Theory with a Bogoliubov-de Gennes stability analysis augmented by a novel Energy Penalty Method, we demonstrate that this phase spontaneously fragments into coherent islands, exhibiting the hallmark Bose glass signature of finite compressibility without global superfluidity. Notably, we propose a unified framework linking disorder-driven localization to deterministic phase frustration, identifying the Bubble Phase as a pristine, disorder-free archetype of the Bose glass. Our results provide a theoretical blueprint for realizing glassy dynamics in clean quantum simulators.

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Yi-fan Zhu, Shi-jie Yang. 2026-01-09. Phase Frustration Induced Intrinsic Bose Glass in the Kitaev-Bose-Hubbard Model. https://arxiv.org/abs/2601.05781

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