From Counterportation to Local Wormholes

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.

41 pages, 5 figures

References in corpus (22)

• Gravitationally-induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity
• Nanophotonic quantum phase switch with a single atom
• A Quantum Gate between a Flying Optical Photon and a Single Trapped Atom
• A photon-photon quantum gate based on a single atom in an optical resonator
• Electromagnetically induced transparency with single atoms in a cavity
• No extension of quantum theory can have improved predictive power
• Protocol for direct counterfactual quantum communication
• Is a time symmetric interpretation of quantum theory possible without retrocausality?
• Constructor Theory of Information
• Particle Path Through a Nested Mach-Zehnder Interferometer
• Copenhagen vs Everett, Teleportation, and ER=EPR
• Past of a quantum particle: Common sense prevails
• Modification of "Counterfactual communication protocols" which eliminates weak particle traces
• Comment on "Past of a quantum particle revisited"
• Exchange-Free Computation on an Unknown Qubit at a Distance
• What is nonlocal in counterfactual quantum communication?
• The laws of physics do not prohibit counterfactual communication
• Comment on "Particle Path Through a Nested Mach-Zehnder Interferometer"
• Deterministic Teleportation and Universal Computation Without Particle Exchange
• Reply to Comment on "Particle Path Through a Nested Mach-Zehnder Interferometer"
• Some unusual wormholes in general relativity
• Counterfactual quantum erasure: spooky action without entanglement

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