9:58 a.m.
Dear friends,
This afternoon at 3:30 in D5.01, Charles Bedard will give an impromptu seminar on
gravitational teleportation. Title and abstract below.
Hope to see you there,
Will Schober
Work in progress with Maria Violaris and Simone Rijavec
Title: Does Gravitational Teleportation Fail?
Abstract: In the famous protocol, the continuous parameters specifying a qubit are
transported---or teleported---using shared entanglement and only two bits of classical
communication.
This raises the problem of which system, if any, actually carries the dependence on the
input state.
Multiple explanations have been offered, and to date, they remain empirically
indistinguishable in standard implementations. Here we show that one of them---the
Deutsch--Hayden explanation, distinguished by its strictly local and causal flow of
information---makes a concrete empirical prediction: teleportation must fail whenever the
communication channel is fundamentally classical.
This turns teleportation into a probe for the classicality of candidate communication
media, making gravity a decisive test case. We thus propose a new empirical test: does
gravitational communication of the two bits support a functioning teleportation protocol?