WISA: World Simulator Assistant for Physics-Aware Text-to-Video
  Generation
Authors: name: Jing Wang, name: Ao Ma, name: Ke Cao, name: Jun Zheng, name: Zhanjie Zhang, name: Jiasong Feng, name: Shanyuan Liu, name: Yuhang Ma, name: Bo Cheng, name: Dawei Leng, name: Yuhui Yin, name: Xiaodan Liang

Recent rapid advancements in text-to-video (T2V) generation, such as SoRA and
Kling, have shown great potential for building world simulators. However,
current T2V models struggle to grasp abstract physical principles and generate
videos that adhere to physical laws. This challenge arises primarily from a
lack of clear guidance on physical information due to a significant gap between
abstract physical principles and generation models. To this end, we introduce
the World Simulator Assistant (WISA), an effective framework for decomposing
and incorporating physical principles into T2V models. Specifically, WISA
decomposes physical principles into textual physical descriptions, qualitative
physical categories, and quantitative physical properties. To effectively embed
these physical attributes into the generation process, WISA incorporates
several key designs, including Mixture-of-Physical-Experts Attention (MoPA) and
a Physical Classifier, enhancing the model's physics awareness. Furthermore,
most existing datasets feature videos where physical phenomena are either
weakly represented or entangled with multiple co-occurring processes, limiting
their suitability as dedicated resources for learning explicit physical
principles. We propose a novel video dataset, WISA-32K, collected based on
qualitative physical categories. It consists of 32,000 videos, representing 17
physical laws across three domains of physics: dynamics, thermodynamics, and
optics. Experimental results demonstrate that WISA can effectively enhance the
compatibility of T2V models with real-world physical laws, achieving a
considerable improvement on the VideoPhy benchmark. The visual exhibitions of
WISA and WISA-32K are available in the https://360cvgroup.github.io/WISA/.