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This breakthrough establishes a "quasi-all-to-all" coupling architecture for neutral-atom quantum computers by using Rydberg atom chains as coherent buses. By enabling nonlocal operations between spatially separated qubits without physical movement, this method overcomes the short-range interaction limits that previously restricted scalable network designs. The demonstrated stability against atomic fluctuations and finite lifetimes suggests a viable path toward reconfigurable, high-connectivity quantum processors.

Sursă care acoperăQuantum Zeitgeist

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Researchers Build Nonlocal Links with Rydberg Atom Bus

Quantum Zeitgeist17 septembrie 20264 min de cititArticolul și perspectiva sunt în engleză.

A chain of Rydberg atoms now mediates connections between qubits without requiring physical movement or direct links. This establishes ‘quasi-all-to-all’ coupling within neutral atom systems, overcoming limitations imposed by spatially restricted native interactions. The method effectively transforms one-dimensional arrangements into networks capable of nonlocal operations and more complex computations.

A chain of Rydberg atoms functions as a coherent quantum bus, converting a simple one-dimensional atomic arrangement into an effective network with connections extending beyond immediate neighbours. This capability enables controllable interaction between spatially separated qubits through virtual excitations within the system. Simulations confirm these mediated dynamics remain stable even when accounting for real-world factors such as fluctuations in atomic position and finite lifetimes of excited states. Chains of ‘Rydberg’ atoms enable neutral atoms to communicate within quantum computers, allowing qubits further apart to…

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