We consider a model of Parisi where a single particle hops on an infinite-dimensional hypercube, under the influence of a uniform but disordered magnetic flux. We reinterpret the hypercube as the Fock-space graph of a many-body Hamiltonian and the flux as a frustration of the return amplitudes in Fock-space. We will identify the set of observables that have the same correlation functions as the double-scaled Sachdev-Ye-Kitaev (DS-SYK) model, and hence the hypercube model is an equally good quantum model for ${\text{near-AdS}}_2/{\text{near-CFT}}_1$ (${\mathrm{NAdS}}_2/{\mathrm{NCFT}}_1$) holography. Unlike the SYK model, the hypercube Hamiltonian is not $p$ local. Instead, the SYK model can be understood as a Fock-space model with similar frustrations. Hence we propose this type of Fock-space frustration as the broader characterization for ${\mathrm{NAdS}}_2/{\mathrm{NCFT}}_1$ microscopics, which encompasses the hypercube and the DS-SYK models as two specific examples. We then speculate on the possible origin of such frustrations.

• Received 7 November 2023
• Accepted 16 January 2024

DOI:https://doi.org/10.1103/PhysRevLett.132.081601

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Published by the American Physical Society