"IBM and Cisco are developing the groundwork for networked distributed quantum computing. The companies aim to demonstrate a proof-of-concept in 2030, in which multiple large-scale quantum computers reinforce each other. Connecting quantum computers requires complex technology. Qubits from different quantum computers must be entangled while they are in separate cryogenic environments. IBM will build a Quantum Networking Unit (QNU) for this purpose. This unit acts as an interface for the Quantum Processing Unit (QPU) and converts stationary quantum information into "flying" quantum information."
"Cisco is developing a quantum network vision for data centers that distributes entanglement between QNUs. The company is developing a software protocol that dynamically reconfigures networks to distribute entanglement when partial calculations are complete. Microwave-optical transducers should enable the transport of quantum information over longer distances. In collaboration with Fermi National Accelerator Laboratory through the Superconducting Quantum Materials and Systems Center, IBM plans to demonstrate multiple interconnected QPUs over the next three years."
"Quantum computing is on the cusp of a new phase. IBM has plans to deliver large-scale, fault-tolerant quantum computers before the end of this decade. However, a single quantum computer is not sufficient for the most complex applications. Jay Gambetta, Director of IBM Research and IBM Fellow, says: "By working with Cisco to explore how to link multiple quantum computers like these together into a distributed network, we will pursue how to further scale quantum's computational power.""
IBM and Cisco are building the infrastructure to connect multiple large-scale quantum processors into a distributed network that reinforces computational power. Qubits in separate cryogenic environments must be entangled, and IBM will build a Quantum Networking Unit (QNU) to interface with QPUs and convert stationary quantum information into "flying" quantum information. Cisco is creating a data-center quantum network design and a dynamic software protocol to distribute entanglement as partial calculations finish. Microwave-optical transducers are expected to enable longer-distance transport of quantum information. IBM will collaborate with Fermilab to demonstrate interconnected QPUs over the next three years. Networks are required to scale to tens or hundreds of thousands of qubits and much larger computational capacity.
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