期刊
PHYSICAL REVIEW LETTERS
卷 124, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.124.191602
关键词
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资金
- ERC [648630 IQFT]
- Swedish Research Council (VR) [2013-4329]
- Knut and Alice Wallenberg foundation
- RFBR [18-01-00460 A]
- Simons Foundation
We initiate a systematic, non-perturbative study of the large-N expansion in the two-dimensional SU(N) x SU(N) principal Chiral model (PCM). Starting with the known infinite-N solution for the ground state at fixed chemical potential, we devise an iterative procedure to solve the Bethe ansatz equations order by order in 1/N. The first few orders, which we explicitly compute, reveal a systematic enhancement pattern at strong coupling calling for the near-threshold resummation of the large-N expansion. The resulting double-scaling limit bears striking similarities to the c = 1 noncritical string theory and suggests that the double-scaled PCM is dual to a noncritical string with a (2 + 1)-dimensional target space where an additional dimension emerges dynamically from the SU(N) Dynkin diagram.
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