Quantum teleportation through time-shifted AdS wormholes

TL;DR

This paper demonstrates that entangled states in AdS/CFT can be made traversable through time-shifts, enabling quantum teleportation that could theoretically function as a time-machine, with implications for black hole physics and quantum gravity.

Contribution

It introduces a method to make time-shifted thermofield states traversable, linking quantum teleportation with time-travel and black hole horizon smoothness in AdS/CFT.

Findings

Time-shifted entangled states can be made traversable.

Quantum teleportation can simulate a time-machine.

Supports the smoothness of black hole horizons in certain states.

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.