By Tristan Greene
Publication Date: 2026-04-03 11:00:00
Researchers have achieved a new record for qubit fidelity in superconducting quantum computer systems — overcoming a key barrier in quantum computing.
In a study published Feb. 27 in the journal Nature Communications, scientists from IBM, RWTH Aachen University in Germany and Los Angeles-based startup Quantum Elements addressed quantum error correction and suppression, which is the largest hurdle to building machines more powerful than the fastest supercomputers.
Superconducting quantum computers use quantum bits (qubits), the quantum equivalent of a computer bit, to perform computations. The systems the researchers used — IBM’s 127-qubit Kyiv and Marrakesh processors — employ a combination of “physical qubits” and “logical qubits,” groups of entangled physical qubits that store the same information in different places, in case a physical qubit storing that information fails mid-calculation.
Physical qubits are embedded…
