Micklitz, T., Monteiro, Felipe ORCID: 0000-0002-1655-9066 and Altland, Alexander (2019). Nonergodic Extended States in the Sachdev-Ye-Kitaev Model. Phys. Rev. Lett., 123 (12). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

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Abstract

We analytically study spectral correlations and many body wave functions of a Sachdev-Ye-Kitaev model deformed by a random Hamiltonian diagonal in Fock space. Our main result is the identification of a wide range of intermediate coupling strengths where the spectral statistics is of Wigner-Dyson type, while wave functions are nonuniformly distributed over Fock space. The structure of the theory suggests that such manifestations of nonergodic extendedness may be a prevalent phenomenon in many body chaotic quantum systems.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Micklitz, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Monteiro, FelipeUNSPECIFIEDorcid.org/0000-0002-1655-9066UNSPECIFIED
Altland, AlexanderUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-141228
DOI: 10.1103/PhysRevLett.123.125701
Journal or Publication Title: Phys. Rev. Lett.
Volume: 123
Number: 12
Date: 2019
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 1079-7114
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
ENERGY-LEVELS; TRANSITION; PHASEMultiple languages
Physics, MultidisciplinaryMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/14122

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