Emergence and Causality in Complex Systems: A Survey on Causal Emergence and Related Quantitative Studies

• URL: http://arxiv.org/abs/2312.16815v3
• Date: Sun, 25 Feb 2024 15:15:22 GMT
• Title: Emergence and Causality in Complex Systems: A Survey on Causal Emergence and Related Quantitative Studies
• Authors: Bing Yuan, Zhang Jiang, Aobo Lyu, Jiayun Wu, Zhipeng Wang, Mingzhe Yang, Kaiwei Liu, Muyun Mou, Peng Cui
• Abstract summary: Causal emergence theory employs measures of causality to quantify emergence. Two key problems are addressed: quantifying causal emergence and identifying it in data. We highlighted that the architectures used for identifying causal emergence are shared by causal representation learning, causal model abstraction, and world model-based reinforcement learning.
• Score: 12.78006421209864
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Emergence and causality are two fundamental concepts for understanding complex systems. They are interconnected. On one hand, emergence refers to the phenomenon where macroscopic properties cannot be solely attributed to the cause of individual properties. On the other hand, causality can exhibit emergence, meaning that new causal laws may arise as we increase the level of abstraction. Causal emergence theory aims to bridge these two concepts and even employs measures of causality to quantify emergence. This paper provides a comprehensive review of recent advancements in quantitative theories and applications of causal emergence. Two key problems are addressed: quantifying causal emergence and identifying it in data. Addressing the latter requires the use of machine learning techniques, thus establishing a connection between causal emergence and artificial intelligence. We highlighted that the architectures used for identifying causal emergence are shared by causal representation learning, causal model abstraction, and world model-based reinforcement learning. Consequently, progress in any of these areas can benefit the others. Potential applications and future perspectives are also discussed in the final section of the review.

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