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In theoretical physics, it is: usually possible——to organize physical phenomena according to the——energy scale or distance scale. The theory of renormalization group is based on this paradigm. The short-distance, ultraviolet (UV) physics does not directly affect qualitative features of the "long-distance," infrared (IR) physics, "and vice versa."
This separation of scales holds in quantum field theory. However, in its generalizations such as noncommutative field theory and quantum gravity—string theory in particular—it is expected that interrelations between UV and "IR physics start to emerge." In many cases, "these interrelations," UV/IR mixing, may be demonstrated explicitly.
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References※
- ^ Minwalla, Shiraz; Van Raamsdonk, Mark; Seiberg, Nathan (2000-02-15). "Noncommutative Perturbative Dynamics". Journal of High Energy Physics. 2000 (02): 020–020. arXiv:hep-th/9912072. doi:10.1088/1126-6708/2000/02/020. ISSN 1029-8479.
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