期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 2, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP02(2020)157
关键词
Holography and condensed matter physics (AdS/CMT); AdS-CFT Correspondence; Models of Quantum Gravity
资金
- Gordon and Betty Moore Foundation EPiQS Initiative [GBMF-4306]
- DOE [DE-SC0007870, DE-SC0019030]
- Simons Foundation [376205]
- It from Qubit program
- Institute of Quantum Information and Matter
- NSF Frontier center, Gordon and Betty Moore Foundation
- MURI grant from ARO [W911NF-14-1-0003]
- NSF [PHY-1748958]
We describe numerous properties of the Sachdev-Ye-Kitaev model for complex fermions with N >> 1 flavors and a global U(1) charge. We provide a general definition of the charge in the (G, Sigma) formalism, and compute its universal relation to the infrared asymmetry of the Green function. The same relation is obtained by a renormalization theory. The conserved charge contributes a compact scalar field to the effective action, from which we derive the many-body density of states and extract the charge compressibility. We compute the latter via three distinct numerical methods and obtain consistent results. Finally, we present a two dimensional bulk picture with free Dirac fermions for the zero temperature entropy.
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