From Counterportation to Local Wormholes

TL;DR

This paper presents an efficient experimental protocol for counterfactual quantum communication called counterportation, which exchanges qubits without particles, challenging traditional notions of interaction and suggesting the existence of traversable wormholes.

Contribution

It introduces a resource-efficient implementation of counterportation that does not require entanglement or classical communication, and links the phenomenon to local wormholes within constructor theory.

Findings

Achieves fidelity beyond classical limits without pre-shared entanglement.

Demonstrates resource efficiency over previous methods.

Suggests experimental evidence for traversable wormholes in quantum lab settings.

Abstract

We propose an experimental realisation of the protocol for the counterfactual disembodied transport of an unknown qubit -- or what we call counterportation -- where sender and receiver, remarkably, exchange no particles. We employ cavity quantum electrodynamics, estimating resources for beating the classical fidelity limit -- except, unlike teleportation, no pre-shared entanglement nor classical communication are required. Our approach is multiple orders of magnitude more efficient in terms of physical resources than previously proposed implementations, paving the way for a demonstration using existing imperfect devices. Surprisingly, while such communication is intuitively explained in terms of "interaction-free" measurement and the Zeno effect, we show that neither is necessary, with far-reaching implications in support of an underlying physical reality. We go on to characterise an explanatory framework for counterportation starting from constructor theory: local wormholes. Conversely, a counterportation experiment demonstrating the traversability of space, by means of what is essentially a 2-qubit exchange-free quantum computer, can point to the existence in the lab of such traversable wormholes.