Researchers have mapped out the physical limits of quantum teleportation, revealing how many particles can be 'beamed' before the signal collapses.
March 31, 2026
Original Paper
How Many Qubits Can Be Teleported? Scalability of Fidelity-Constrained Quantum Applications
arXiv · 2603.28672
The Takeaway
Quantum teleportation is moving from science fiction to network engineering as scientists calculate exactly how long a teleported state can survive in physical memory. They discovered that the decay of quantum memory, rather than the distance of the transmission, is the primary bottleneck preventing a global quantum internet.
From the abstract
Quantum networks (QNs) enable the transfer of qubits between distant nodes using quantum teleportation, which reproduces a qubit state at a remote location by consuming a shared Bell pair. After teleportation, qubits are stored in quantum memories, where decoherence progressively degrades their quantum states. This degradation is quantified by the fidelity, defined as the overlap between the stored quantum state and the ideal target state. Some quantum applications (QApps) require the teleportat