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Wormholes without averaging
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DOI：10.1007/JHEP09(2024)133.png)
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Abstract
En 中文
After averaging over fermion couplings, SYK has a collective field description that sometimes has wormhole solutions. We study the fate of these wormholes when the couplings are fixed. Working mainly in a simple model, we find that the wormhole saddles persist, but that new saddles also appear elsewhere in the integration space - half-wormholes. The wormhole contributions depend only weakly on the specific choice of couplings, while the half-wormhole contributions are strongly sensitive. The half-wormholes are crucial for factorization of decoupled systems with fixed couplings, but they vanish after averaging, leaving the non-factorizing wormhole behind.
Keywords:
AdS-CFT Correspondence
Models of Quantum Gravity
1/N Expansion
Journal
IF:
5.5
Papers:
3.9W
Citations:
13.7W