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- W3212051357 abstract "We investigate two sparse Sachdev-Ye-Kitaev (SYK) systems coupled by a bilinear term as a holographic quantum mechanical description of an eternal traversable wormhole in the low temperature limit. Each SYK system consists of $N$ Majorana fermions coupled by random $q$-body interactions. The degree of sparseness is captured by a regular hypergraph in such a way that the Hamiltonian contains exactly $k,N$ independent terms. We improve on the theoretical understanding of the sparseness property by using known measures of hypergraph expansion. We show that the sparse version of the two coupled SYK model is gapped with a ground state close to a thermofield double state. Using Krylov subspace and parallelization techniques, we simulate the system for $q=4$ and $q=8.$ The sparsity of the model allows us to explore larger values of $N$ than the ones existing in the literature for the all-to-all SYK. We analyze in detail the two-point functions and the transmission amplitude of signals between the two systems. We identify a range of parameters where revivals obey the scaling predicted by holography and signals can be interpreted as traversing the wormhole." @default.
- W3212051357 created "2021-11-22" @default.
- W3212051357 creator A5042708177 @default.
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- W3212051357 date "2021-11-01" @default.
- W3212051357 modified "2023-09-23" @default.
- W3212051357 title "Sparse SYK and traversable wormholes" @default.
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- W3212051357 doi "https://doi.org/10.1007/jhep11(2021)015" @default.
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