On May 6, researchers from QuTech and Delft University of Technology demonstrated a new approach to connecting semiconductor spin qubits: moving qubits rather than keeping them fixed. Using travelling electrical potentials, electron-spin qubits were transported toward one another by 240 nanometres, achieving about 99% two-qubit gate fidelity.

They also demonstrated conditional quantum-state teleportation between qubits 320 nanometres apart, with about 87% fidelity. This mobile-qubit architecture could reduce wiring and connectivity challenges in large quantum processors by allowing qubits to move between storage, interaction, entanglement, and readout zones.

While still experimental, the work suggests quantum information itself could move across future silicon chips.