Information transmission without energy exchange

TL;DR

This paper demonstrates a method of quantum communication using a massless field where no energy is exchanged, relying on vacuum fluctuations and subtle effects related to Huygens' principle, allowing signals to travel slower than light.

Contribution

It introduces a novel quantum communication protocol that operates without energy transfer, exploiting vacuum field interactions and spacetime dimensional effects.

Findings

Communication can occur without energy exchange.

Signals can be transmitted arbitrarily slower than light.

The method relies on vacuum fluctuations and spacetime geometry.

Abstract

We show that it is possible to use a massless field in the vacuum to communicate in such a way that the signal travels arbitrarily slower than the speed of light and such that no energy is transmitted from the sender to the receiver. Instead, the receiver has to supply a signal-dependent amount of work to switch his detector on and off. Because of that, this kind of communication without energy exchange may be called "Quantum Collect Calling". This type of communication is related to Casimir-like interactions and it is made possible by dimension ---and curvature--- dependent subtleties of Huygens' principle.