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arXiv · 1911.06314

Quantum Gravity in the Lab: Teleportation by Size and Traversable Wormholes

Adam R. Brown·Hrant Gharibyan·Stefan Leichenauer·Henry W. Lin·Sepehr Nezami·Grant Salton·Leonard Susskind·Brian Swingle·Michael Walter
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Abstract

With the long-term goal of studying models of quantum gravity in the lab, we propose holographic teleportation protocols that can be readily executed in table-top experiments. These protocols exhibit similar behavior to that seen in the recent traversable wormhole constructions of [1,2]: information that is scrambled into one half of an entangled system will, following a weak coupling between the two halves, unscramble into the other half. We introduce the concept of teleportation by size to capture how the physics of operator-size growth naturally leads to information transmission. The transmission of a signal through a semi-classical holographic wormhole corresponds to a rather special property of the operator-size distribution we call size winding. For more general systems (which may not have a clean emergent geometry), we argue that imperfect size winding is a generalization of the traversable wormhole phenomenon. In addition, a form of signalling continues to function at high temperature and at large times for generic chaotic systems, even though it does not correspond to a signal going through a geometrical wormhole, but rather to an interference effect involving macroscopically different emergent geometries. Finally, we outline implementations feasible with current technology in two experimental platforms: Rydberg atom arrays and trapped ions.

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Adam R. Brown, Hrant Gharibyan, Stefan Leichenauer, Henry W. Lin, Sepehr Nezami, Grant Salton, Leonard Susskind, Brian Swingle, Michael Walter. 2019-11-14. Quantum Gravity in the Lab: Teleportation by Size and Traversable Wormholes. https://doi.org/10.1103/prxquantum.4.010320

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