{"id":237631,"date":"2026-05-23T02:21:37","date_gmt":"2026-05-23T07:21:37","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/05\/canceling-quantum-noise"},"modified":"2026-05-23T02:21:37","modified_gmt":"2026-05-23T07:21:37","slug":"canceling-quantum-noise","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/05\/canceling-quantum-noise","title":{"rendered":"Canceling Quantum Noise"},"content":{"rendered":"<p style=\"padding-right: 20px\"><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/canceling-quantum-noise.jpg\"><\/a><\/p>\n<p>A new technique uses an \u2018anti-noise\u2019 signal to cancel out the unavoidable quantum noise associated with precision measurements like those needed for gravitational-wave detection.<\/p>\n<p>When light is used to detect motion with high-precision\u2014for example, in accelerometers or gravitational-wave detectors\u2014its ultimate sensitivity is limited by quantum noise, which is unavoidable. A research team has now demonstrated a tabletop device that can reduce the disruption of quantum noise by modifying a light beam before using it to make a measurement [<a href=\"https:\/\/physics.aps.org\/articles\/v19\/77#c1\">1<\/a>]. This beam preparation cancels out the noise in a manner reminiscent of noise-canceling headphones [<a href=\"https:\/\/physics.aps.org\/articles\/v19\/77#c1\">1<\/a>]. Working across a wide frequency range and potentially offering up to 77% noise reduction, the system might ultimately find additional uses in quantum information processing.<\/p>\n<p>Observing gravitational waves involves detecting changes in the interference pattern created by a pair of interacting laser beams, each of which has bounced off a remote mirror whose distance changes slightly when a wave passes. Such detections require very high sensitivity, which is compromised by inherent quantum fluctuations in the light field. To reduce quantum noise, researchers currently use a technique called squeezing, in which the quantum fluctuations can be shifted from one parameter, such as the phase, to another, such as the intensity [<a href=\"https:\/\/physics.aps.org\/articles\/v19\/77#c2\">2<\/a>, <a href=\"https:\/\/physics.aps.org\/articles\/v19\/77#c3\">3<\/a>].<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A new technique uses an \u2018anti-noise\u2019 signal to cancel out the unavoidable quantum noise associated with precision measurements like those needed for gravitational-wave detection. When light is used to detect motion with high-precision\u2014for example, in accelerometers or gravitational-wave detectors\u2014its ultimate sensitivity is limited by quantum noise, which is unavoidable. A research team has now demonstrated [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1617],"tags":[],"class_list":["post-237631","post","type-post","status-publish","format-standard","hentry","category-quantum-physics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/237631","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=237631"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/237631\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=237631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=237631"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=237631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}