Unitarity bound violation in holography and the instability toward the charge density wave
- Title
- Unitarity bound violation in holography and the instability toward the charge density wave
- Author
- 신상진
- Keywords
- Gauge/gravity duality; fermion spectral function; charge density wave
- Issue Date
- 2020-07
- Publisher
- WORLD SCIENTIFIC PUBL CO PTE LTD
- Citation
- INTERNATIONAL JOURNAL OF MODERN PHYSICS A, v. 35, no. 22, article no. 2050128, page. 0-16
- Abstract
- We study the spectral function of holographic fermions with Pauli term. We find the k-dependent instability signaled by the tachyonic spectrum (k-gap) from the m ˃ 1/2 regime where unitarity is violated. We suggest that this is the instability toward the charge density wave (CDW) based on the similarity of the unitarity violation in conformal field theory (CFT) and the nesting Fermi surface phenomena in weakly interaction system: both of them give divergent enhancement of degree of freedom.
- URI
- https://www.worldscientific.com/doi/abs/10.1142/S0217751X20501286https://repository.hanyang.ac.kr/handle/20.500.11754/175105
- ISSN
- 0217-751X; 1793-656X
- DOI
- 10.1142/S0217751X20501286
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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