Ruhr-Uni-Bochum

Quantum gravity in the lab. II. Teleportation by size and traversable wormholes

2022

Conference / Journal

Authors

Stefan Leichenauer Grant Salton Leonard Susskind Brian Swingle Michael Walter

Research Hub

Research Hub A: Kryptographie der Zukunft

Abstract

In [1] we discussed how quantum gravity may be simulated using quantum devices and gave a specific proposal—teleportation by size and the phenomenon of size-winding. Here we elaborate on what it means to do ‘Quantum Gravity in the Lab’ and how size-winding connects to bulk gravitational physics and traversable wormholes. Perfect size-winding is a remarkable, fine-grained property of the size wavefunction of an operator; we show from a bulk calculation that this property must hold for quantum systems with a nearly-AdS2 bulk. We then examine in detail teleportation by size in three systems: the Sachdev-Ye-Kitaev model, random matrices, and spin chains, and discuss prospects for realizing these phenomena in near-term quantum devices.

Tags

Quantum Information