Researchers Link Defects To Loss Of Qubit Coherence

Quantum information science has entered its second phase, enabling more complex computations and sensing technologies than previously possible. This new era demands advances in materials science as limitations now stem less from device design and increasingly from poorly defined material properties across multiple platforms including superconducting circuits and two-dimensional materials. More powerful quantum computers are now constrained not by design but by imperfections within constituent materials; this ‘structure-coherence problem’ affects various types of hardware including superconducting circuits and two-dimensional materials.

These limitations arise from poorly understood atomic-scale surfaces, interfaces and defects which degrade performance across all solid-state platforms. Addressing these fundamental material issues is essential for creating larger, more reliable quantum processors capable of exceeding current capabilities. Material imperfections increasingly limit advances in quantum computing hardware, whereas previously, design limitations were the primary obstacle.

This shift marks ‘Quantum Evolution 2.0’, where building scalable multi-qubit processors demands deeper understanding of atomic-scale defects within solid-state platforms like superconducting circuits and two-dimensional materials, extremely thin layers stacked together much like LEGO bricks. A key challenge is decoherence, a gradual loss of signal clarity akin to increasing static interference on a radio, impacting performance across all systems.