Maldacena-Qi protocol: coupled SYK clusters as dual holographic wormhole
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Fidelity
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Peak time
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λ_L / (2π/β)
Two SYK clusters L and R, each with N Majorana fermions, are coupled by H_int = igΣ_j ψ^L_j ψ^R_j. This negative-energy injection opens a traversable wormhole: a signal injected at t=-t₀ on the left emerges on the right at t=+t₀. Teleportation fidelity F peaks when coupling g crosses the wormhole-opening threshold. The SYK model saturates the chaos bound λ_L = 2π/β, consistent with black hole scrambling.