Fragmented quantum phases in anti-blockade regime of Rydberg atom array

• URL: http://arxiv.org/abs/2507.17488v1
• Date: Wed, 23 Jul 2025 13:14:03 GMT
• Title: Fragmented quantum phases in anti-blockade regime of Rydberg atom array
• Authors: Han-Chao Chen, Zheng-Yuan Zhang, Meng Zhou, Xin Liu, Li-Hua Zhang, Bang Liu, Lu-Xia Wang, Dong-Sheng Ding, Bao-Sen Shi,
• Abstract summary: We report a parameter-dependent Hilbert space fragmentation in a one-dimensional Rydberg atom array under anti-blockade conditions.<n>Our results highlight the potential of anti-blockade mechanisms for programmable non-thermal dynamics in many-body systems.
• Score: 26.40335566788265
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In this Letter, we report a parameter-dependent Hilbert space fragmentation in a one-dimensional Rydberg atom array under anti-blockade conditions. We identify distinct non-equilibrium dynamical phases and show that their quasi-periodic behavior arises from the interplay of multi-path interference and multi-photon cascaded excitations, reflecting fundamental differences in state connectivity and effective dimensionality. By constructing a complete phase diagram, we reveal the transition from thermalization to fragmentation, and further demonstrate a secondary fragmentation process enabled by local constraints. Our results highlight the potential of anti-blockade mechanisms for programmable non-thermal dynamics in many-body systems.

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