In novel quantum computer design, qubits use magnets to selectively communicate

https://phys.org/news/2024-01-quantum-qubits-magnets-communicate.html

"sending signals through magnets, not air, entangling individual qubits across chip at room temperature... scalable... nitrogen vacancy (NV) centers—defects in diamond used as qubits... Connecting NV center qubits with magnets enables selective interaction... 2 qubits talking at slightly different frequency entangle without disturbing or being affected by other qubits or those in- between... NV center talked to magnet transmitting microwave magnon... future: magnet mediates between 2 NV centers"