{"id":226468,"date":"2025-10-15T12:24:08","date_gmt":"2025-10-15T12:24:08","guid":{"rendered":"https:\/\/www.newsbeep.com\/us\/226468\/"},"modified":"2025-10-15T12:24:08","modified_gmt":"2025-10-15T12:24:08","slug":"researchers-achieve-atomic-scale-control-of-quantum-interference","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/us\/226468\/","title":{"rendered":"Researchers achieve atomic-scale control of quantum interference"},"content":{"rendered":"

\"Researchers<\/p>\n

Electric control of the energy detuning of a single Ti spin. Credit: Nature Communications (2025). DOI: 10.1038\/s41467-025-64022-9<\/p>\n

In a study published in Nature Communications<\/a>, a research team demonstrates the all-electrical control of quantum interference in individual atomic spins on a surface.<\/p>\n

Quantum interference arises when a system exists in a superposition of states, with relative phases producing constructive or destructive interference<\/a>. An example is Landau-Zener-St\u00fcckelberg-Majorana (LZSM) interference, which arises when a quantum two-level system is repeatedly driven through an anticrossing in the energy-level diagram, and undergoes multiple nonadiabatic transitions.<\/p>\n

This mechanism is a powerful tool for fast and reliable quantum control, but it remains a significant challenge to achieve tunable LZSM interference in an atomic-scale quantum architecture where multiple spins can be precisely assembled and controllably coupled on demand.<\/p>\n

In this study, using a custom-built advanced microscope known as electron spin resonance-scanning tunneling microscope (ESR-STM), the researchers developed an all-electrical method to control LZSM quantum interference<\/a> in individual and coupled atomic spins on insulating films.<\/p>\n

By modulating atomically confined tip-atom interactions with strong electric fields, they rapidly drove spin states through anticrossings and observed rich interference patterns, including multiphoton resonances and signatures of spin-transfer torque.<\/p>\n

Multilevel LZSM spectra measured on coupled spins with tunable interactions showed distinct interference patterns depending on their many-body energy landscapes.<\/p>\n

These findings open new avenues for all-electrical quantum manipulation in spin-based quantum processors in the strongly driven regime. This study opens up new possibilities for fast and robust quantum-state manipulation at the atomic scale.<\/p>\n

The researchers were led by Prof. Yang Kai from the Institute of Physics of the Chinese Academy of Sciences, along with Prof. Joaqu\u00edn Fern\u00e1ndez-Rossier from International Iberian Nanotechnology Laboratory.<\/p>\n

More information:
\n\t\t\t\t\t\t\t\t\t\t\t\tHao Wang et al, Electrically tunable quantum interference of atomic spins on surfaces, Nature Communications (2025). DOI: 10.1038\/s41467-025-64022-9<\/a><\/p>\n

\n\t\t\t\t\t\t\t\t\t\t\t\t\tProvided by
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tChinese Academy of Sciences<\/a>
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n

\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/p>\n

\n\t\t\t\t\t\t\t\t\t\t\t\tCitation:
\n\t\t\t\t\t\t\t\t\t\t\t\tResearchers achieve atomic-scale control of quantum interference (2025, October 14)
\n\t\t\t\t\t\t\t\t\t\t\t\tretrieved 15 October 2025
\n\t\t\t\t\t\t\t\t\t\t\t\tfrom https:\/\/phys.org\/news\/2025-10-atomic-scale-quantum.html\n\t\t\t\t\t\t\t\t\t\t\t <\/p>\n

\n\t\t\t\t\t\t\t\t\t\t\t This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
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