Researchers demonstrate high-fidelity gates and quantum teleportation with mobile silicon spin qubits
Updated
Updated · Nature.com · May 6
Researchers demonstrate high-fidelity gates and quantum teleportation with mobile silicon spin qubits
7 articles · Updated · Nature.com · May 6
In Nature, the team reported 98.86% CZ-gate fidelity and 86.7% teleportation fidelity between qubits separated by 320nm in a six-quantum-dot silicon device.
Two electron spins were shuttled 240nm toward each other in travelling potential minima, enabling tunable exchange interactions and about 99% two-qubit gate fidelity in 58ns operations.
The work targets scalable, reconfigurable semiconductor quantum processors with flexible connectivity, though the teleportation remains conditional and post-selected rather than fully deterministic.
As thousands of qubits begin moving on-chip, how will scientists prevent quantum traffic jams?
Does moving qubits create more errors than it solves for quantum computing's future?
Is this the ultimate quantum blueprint, or just one piece in a future hybrid machine?
High-Fidelity (99%) Two-Qubit Operations Enabled by Mobile Qubit Conveyor-Mode in Silicon Quantum Processors
Overview
In April 2026, researchers achieved a major breakthrough by implementing high-fidelity two-qubit gates between mobile semiconductor spin qubits using a novel conveyor-mode shuttling technique. This method moves electrons smoothly within moving potential wells, enabling scalable control with fixed wiring and high-fidelity operations. The approach supports complex 2D qubit routing and precise quantum interactions during transport. While environmental noise and control imperfections challenge coherence, solutions like passive noise reduction, motional narrowing, dynamical decoupling, and advanced gate control have significantly improved qubit stability. Combining mobile qubits for flexible connectivity with static qubit clusters forms a promising hybrid architecture, leveraging CMOS compatibility to pave the way toward scalable, manufacturable quantum processors.