Abstract
Based on the work of Gao-Jafferis-Wall and Maldacena-Stanford-Yang, we observe that the time-shifted thermofield states of two entangled CFTs can be made traversable by an appropriate coupling of the two CFTs, or alternatively by the application of a modified quantum teleportation protocol. This provides evidence for the smoothness of the horizon for a large class of entangled states related to the thermofield by time-translations. The smoothness of these states has some relevance for the firewall paradox and the proposal that some observables in quantum gravity may be state-dependent. We notice that quantum teleportation through these entangled states could be used in a laboratory setup to implement a “time-machine”, which allows the observer to travel far in the future.
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van Breukelen, R., Papadodimas, K. Quantum teleportation through time-shifted AdS wormholes. J. High Energ. Phys. 2018, 142 (2018). https://doi.org/10.1007/JHEP08(2018)142
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DOI: https://doi.org/10.1007/JHEP08(2018)142