Bidirectional teleportation using scrambling dynamics: a practical protocol

TL;DR

This paper presents a practical protocol for bidirectional quantum teleportation using scrambling dynamics, combining concepts from black hole information recovery and quantum teleportation to enable state exchange without local control.

Contribution

It introduces a novel protocol that leverages quantum scrambling and the Hayden-Preskill scheme for bidirectional quantum state transfer in systems lacking universal local control.

Findings

Protocol enables coherent bidirectional quantum state transfer.

Proposes experimental realization with Dicke model in cavity-QED and trapped-ion systems.

Clarifies roles of information spreading, entanglement, and chaos in quantum teleportation.

Abstract

We show that quantum information scrambling can enable a generic SWAP gate between collective degrees of freedom in systems without universal local control. Our protocol combines the Hayden-Preskill recovery scheme, associated with the black hole information paradox, with quantum teleportation and runs them in parallel and in opposite directions, enabling bidirectional exchange of quantum states through global interactions alone. This approach cleanly distinguishes the roles of information spreading, entanglement, and chaos for enabling both coherent state transfer and recovery. We propose an experimental realization using the Dicke model, which can be realized in cavity-QED and trapped-ion platforms, highlighting the utility of holography in designing practical quantum gates.