In a unitary qubit-circuit model of black-hole evaporation, a θ-scrambled initial hole state shifts firewall emergence earlier and, for θ inside an analytic window (Eq. 53), lets radiation carry away the information for every value of Mω.
Disentangling Scrambling and Decoherence via Quantum Teleportation
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abstract
Out-of-time-order correlation (OTOC) functions provide a powerful theoretical tool for diagnosing chaos and the scrambling of information in strongly-interacting, quantum systems. However, their direct and unambiguous experimental measurement remains an essential challenge. At its core, this challenge arises from the fact that the effects of both decoherence and experimental noise can mimic that of information scrambling, leading to decay of OTOCs. Here, we analyze a quantum teleportation protocol that explicitly enables one to differentiate between scrambling and decoherence. Moreover, we demonstrate that within this protocol, one can extract a precise "noise" parameter which quantitatively captures the non-scrambling induced decay of OTOCs. Using this parameter, we prove explicit bounds on the true value of the OTOC. Our results open the door to experimentally measuring quantum scrambling with built-in verifiability.
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gr-qc 1years
2026 1verdicts
UNVERDICTED 1representative citing papers
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Entanglement and firewalls in quantum circuit model of black hole evaporation
In a unitary qubit-circuit model of black-hole evaporation, a θ-scrambled initial hole state shifts firewall emergence earlier and, for θ inside an analytic window (Eq. 53), lets radiation carry away the information for every value of Mω.