Quantum Energy Teleportation across Multi-Qubit Systems using W-State Entanglement

Alif Elham Khan, Humayra Anjum

Abstract: Quantum energy teleportation (QET) has so far only been realized on a two-qubit platform. Real-world communication, however, typically involves multiple parties. Here we design and experimentally demonstrate the first multi-qubit QET protocol using a robust W-state multipartite entanglement. Three-, four-, and five-qubit circuits were executed both on noiseless simulators and on IBM superconducting hardware. In every case a single sender injects an energy $E_{0}$ that is then deterministically and decrementally harvested by several remote receivers, confirming that energy introduced at one node can be redistributed among many entangled subsystems at light-speed-limited classical latency. Our results open a practical route toward energy-aware quantum networks.