San Francisco, April 25, 2026, 14:04 (PDT)
- Cisco unveiled a prototype quantum switch designed to link various types of quantum computers and sensors.
- Cisco’s push is notable as it looks to stretch its core networking business into territory where hardware players like Alphabet’s Google and IBM currently dominate.
- The device remains in prototype form, with widespread quantum networks likely years away.
Cisco Systems, Inc. unveiled a switching chip it claims links multiple kinds of quantum computers—staking out a spot in quantum tech while steering clear of making the machines themselves. The San Jose network gear company introduced its prototype, dubbed the Cisco Universal Quantum Switch, saying it’s able to route quantum data via existing telecom fiber and does it all at room temperature.
Timing is key here. Quantum computing is still largely confined to research, yet big tech players are already working to shape the standards for how these machines will connect, secure data, and expand. Cisco, echoing the pitch that fueled its legacy business, argues that the network is just as critical as the machines themselves.
Investors are eyeing Cisco to see if it can push its growth narrative past its core lineup of routers, switches, and security software. U.S. markets were shut Saturday. Cisco shares last changed hands at $89.01, putting its market cap near $354.6 billion, market data show.
Quantum computers work with qubits, not bits, which act nothing like the ones and zeros in regular machines. The challenge? Each platform encodes qubits differently—some rely on light’s polarization, others on timing, frequency, or the path itself. Cisco says its new switch can convert across all those formats while keeping the quantum state intact.
Vijoy Pandey, who heads Outshift as senior vice president and general manager at Cisco, described the device to Reuters as a kind of “translator” between quantum systems. “You can speak any language,” said Pandey. Reuters
Cisco reported that its proof-of-concept trials kept quantum information largely intact, seeing average losses no higher than 4% in both encoding and entanglement fidelity. That’s the metric for how much the delicate quantum signals withstand transfer or conversion.
Competition in the sector is straightforward: Alphabet’s Google and IBM are busy developing their own quantum computers. Cisco, on the other hand, is pitching itself as the provider of the technology that links these machines—regardless of vendor. That strategy positions Cisco not as a head-to-head hardware competitor, but as a possible key operator for distributed quantum networks.
Cisco pointed out that the switch isn’t just for the long term—security applications could come much sooner. Using entanglement—a quantum effect where particles are linked and the connection snaps if someone tries to observe—it’s possible to build sensors that flag eavesdropping on a network. Jeetu Patel, Cisco’s president and chief product officer, told Reuters the ability to spot activity on a network using a quantum switch could overhaul a company’s “defense posture.” Reuters
Futurum Group analyst Tom Hollingsworth described Cisco’s prototype as a push to make interoperability in quantum networking “the default, not the exception.” He pointed out that the device takes on a market landscape where vendors prefer to lock down their systems. Futurum
Still, there’s plenty of risk here. Cisco’s documentation indicates that right now, it’s only tested the switch with polarization encoding. Support for time-bin and frequency-bin is still pending; those come next in the validation process. Reuters has pointed out that true large-scale quantum computer networks probably won’t emerge before the 2030s, though limited security applications could show up sooner.
The key issue: Can Cisco take this out of the lab and get it running in real-world infrastructure for telecoms, cloud outfits, and quantum hardware makers? Actual networks drag in loss, noise, and relentless cost demands. Quantum gear isn’t built to handle much of that.
Cisco isn’t chasing after the world’s largest quantum computer—not its play, at least for now. Instead, it’s staking out ground where it can help: making sure those future quantum machines can actually communicate.
