{"id":65616,"date":"2025-05-01T12:09:07","date_gmt":"2025-05-01T12:09:07","guid":{"rendered":"https:\/\/www.europesays.com\/uk\/65616\/"},"modified":"2025-05-01T12:09:07","modified_gmt":"2025-05-01T12:09:07","slug":"hemispherical-mirror-technique-results-in-quantum-noise-reduction","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/uk\/65616\/","title":{"rendered":"Hemispherical mirror technique results in quantum noise reduction"},"content":{"rendered":"

\"Breakthrough<\/p>\n

An illustration showing a standing light wave reflected from a curved mirror with a spherical particle at the center. A stream of information, represented by 0s and 1s, emerges from the system. Credit: Dr James Bateman<\/p>\n

Researchers at Swansea University have discovered a way to use mirrors to dramatically reduce the quantum noise that disturbs tiny particles\u2014a breakthrough that might seem magical but is rooted in quantum physics.<\/p>\n

When scientists measure extremely small objects, such as nanoparticles, they face a difficult challenge: simply observing these particles disturbs them. This happens because photons, particles of light, used for measurement “kick” the tiny particles<\/a> they hit, an effect known as “backaction.”<\/p>\n

In a new study published<\/a> in Physical Review Research, a team from the university’s Physics Department has revealed a remarkable connection, that this relationship works both ways.<\/p>\n

Swansea University Ph.D. student Rafal Gajewski, first author of the study, said, “Our work has shown that if you can create conditions where measurement becomes impossible, the disturbance disappears too.”<\/p>\n

“Using a hemispherical mirror with the particle at its center, we found that under specific conditions, the particle becomes identical to its mirror image<\/a>. When this happens, you can’t extract position information from the scattered light<\/a>, and at the same time, the quantum backaction vanishes.”<\/p>\n

This breakthrough holds potential for a number of exciting applications, including:<\/p>\n