Quantum coherence, the phenomenon where particles exist in multiple states simultaneously, is a cornerstone of quantum computing and information science. Recent advancements have significantly extended the duration of quantum coherence, enhancing the stability and reliability of quantum systems. In July 2025, researchers at Aalto University in Finland reported a transmon qubit coherence time reaching the millisecond range, a substantial improvement over previous records. This progress allows quantum computers to perform more complex operations with reduced error rates, bringing us closer to practical, fault-tolerant quantum computing. eurekalert.org
Similarly, in October 2025, scientists at Caltech achieved a groundbreaking milestone by synchronizing 6,100 neutral atom qubits in a quantum array. Unlike superconducting qubits that require near absolute-zero temperatures, these neutral atoms operate at room temperature, offering easier scalability. The team extended the coherence time to an unprecedented 12.6 seconds, critical for conducting error-resistant quantum calculations. This achievement not only sets a new record for the number of atomic qubits placed in a single array but also demonstrates the potential for large-scale, fault-tolerant quantum computers. livescience.com
The extended coherence times in quantum systems enable more complex computations with fewer errors, leading to more reliable quantum computers. This reliability is crucial for practical applications in fields like cryptography, where secure communication relies on the integrity of quantum states.