IQN (NewsDesk): IBM researchers successfully linked two separate 120-qubit quantum processors using a photonic interconnect, achieving a 99 percent state transfer fidelity between the chips.
The demonstration is a step toward “quantum networking” — connecting multiple smaller processors into one larger, more powerful system rather than relying on a single monolithic chip, which becomes harder to manufacture and cool as qubit counts rise. IBM has positioned modular, linked architectures as central to its roadmap toward fault-tolerant quantum computing later this decade.
The high fidelity rate suggests the interconnect introduces minimal error when information passes between chips, a key requirement for any future large-scale, distributed quantum computer.
