"Nighthawk, a computing chip anticipated to be ready for use by the end of this year, features 120 qubits connected via 218 next-generation tunable couplers. This increased connectivity between qubits supports seamless data processing to solve intricate calculations that demand up to 5,000 two-qubit gates - the specific operations that manipulate quantum data. IBM said it expects to continue expanding the number of gates Nighthawk can process to 7,500 by the end of 2026, with the goal of reaching 10,000 in 2027."
"Its novel architecture features longer couplers that physically connect qubits in a single lattice. As these couplers facilitate qubit connectivity, qubits have less barriers to entanglement, thus supporting stable quantum computing. "Loon is a device built to demonstrate a path to fault-tolerant quantum computing," Gambetta said. "It requires many more layers of metal than Nighthawk, and it's our default path to build these future fault-tolerant quantum computers by 2029. So the key difference is that it has more couplers.""
IBM is advancing toward fault-tolerant quantum computing through two new processors: Nighthawk and Loon. Nighthawk is a 120-qubit processing chip with 218 next-generation tunable couplers that increases qubit connectivity to handle up to 5,000 two-qubit gates now and targets 7,500 gates by end of 2026 and 10,000 by 2027. Loon is a larger lattice processor with longer couplers and additional metal layers to improve physical qubit connections, reduce barriers to entanglement, and support more reliable, stable quantum computing. Both designs aim to accelerate fast, accurate computation and provide a path toward fault-tolerant machines by 2029.
Read at Nextgov.com
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