Cisco is positioning quantum networking as the next evolution in networking technology. During a session at Cisco Live 2026, Ramana Kompella, head of Cisco Research, emphasized that while quantum computing is gaining attention, it is the network infrastructure that will truly unlock its potential.
Kompella explained that the current limitations in practical quantum computing are primarily due to inadequate networking capabilities rather than processing power. He likened the adaptation needed in quantum networking to how classical networking scaled to create the modern internet, arguing that it could drastically shorten the timeline for implementing functional quantum computing.
Understanding Quantum Networking
Quantum networking differs fundamentally from classical networking. In classical systems, data is packaged into packets and transmitted through switches and routers. In contrast, quantum networks utilize entangled photon pairs to convey information, where the measurement of one photon instantly reveals the state of its paired counterpart, regardless of distance.
In this framework, classical bits (0s and 1s) are replaced by qubits, which can exist in multiple states simultaneously due to a property called superposition. As such, quantum networks enable information transfer through a process termed “quantum teleportation,” where qubits can seemingly vanish from one location and manifest in another without traversing the physical space in between. However, the receiver must still await a classical signal to confirm the qubit’s interpretation, ensuring that the transmission ultimately operates within the speed of light limit.
Cisco’s Innovations
Kompella shared insights into Cisco’s advancements in hardware designed for quantum networking. The company has developed an entanglement source capable of generating 200 million entangled photon pairs per second, which functions with existing fiber infrastructure, eliminating the need for specialized quantum-only fibers. Additionally, the Cisco Universal Quantum Switch—a new chip designed to manage quantum data flows—faces the unique challenge of preserving delicate quantum states without interference.
This switch is versatile, capable of interacting with various types of quantum computers—whether superconducting, neutral atom, or ion trap systems—effectively creating a unified interconnection layer for disparate quantum processing approaches.
Potential Applications in the Classical World
Quantum networking is not only relevant to future quantum computing but is already manifesting utility in today’s classical computing terrain. Two specific applications highlighted by Kompella include:
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Quantum Sync: This method allows trading desks to synchronize actions across long distances, activating simultaneous buy/sell orders without being hindered by latency, offering a significant advantage in high-frequency trading scenarios.
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Quantum Alert: This security measure detects eavesdropping on encrypted communications. By utilizing entangled photons for correlation and measurement, it can identify unauthorized access, ensuring that signal integrity remains intact.
Moving Forward
Cisco has begun testing entanglement techniques under real-world conditions, partnering with a company named Connect to conduct experiments over existing fiber networks in New York. Collaborations with major players like IBM and Atom Computing further illustrate Cisco’s commitment to developing a comprehensive, interoperable quantum networking framework capable of supporting various quantum computer designs.
Kompllea’s presentation underscored that quantum networking holds substantial promise, not just for advanced computational tasks but also for practical enhancements to current classical systems, paving the way for a future where quantum and classical networks coexist and enhance each other.
