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Jiaqi Li

3 papers indexed

arxivcs.LGcs.RO2026-07-22

Koopman Dreamer: Spectrally Constrained Latent Dynamics for Stable World-Model Imagination

Jiaqi Li, Xinglong Zhang, Haibin Xie, Yixing Lan, Wei Pan, Xin Xu

Latent world models improve sample efficiency in continuous control by optimizing policies over imagined latent trajectories, but common neural transitions offer limited direct control over modal persistence and error accumulation in long rollouts. We propose Koopman Dreamer, a D…

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arxivcs.CV2026-07-07

WildCity: A Real-World City-Scale Testbed for Rendering, Simulation, and Spatial Intelligence

Xiangyu Han, Mengyu Yang, Jiaqi Li, Bowen Chang, Ziyu Chen, Hexu Zhao, et al.

Humans can navigate an unfamiliar city and gradually form a coherent spatial mental map spanning tens of square kilometers. Can AI build spatial representations at a comparable scale? Although recent foundation models have advanced scene reconstruction and embodied intelligence,…

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