{"id":294130,"date":"2026-06-22T19:57:22","date_gmt":"2026-06-22T19:57:22","guid":{"rendered":"http:\/\/6a397faf45b62a5ff1c03228"},"modified":"2026-06-22T19:57:22","modified_gmt":"2026-06-22T19:57:22","slug":"los-nuevos-relojes-mas-precisos-del-planeta-miden-el-tiempo-con-nucleos-atomicos","status":"publish","type":"post","link":"https:\/\/sarmiento24h.com\/?p=294130","title":{"rendered":"Los nuevos relojes m\u00e1s precisos del planeta miden el tiempo con n\u00facleos at\u00f3micos"},"content":{"rendered":"<p>Los cient\u00edficos est\u00e1n obsesionados con construir el reloj m\u00e1s preciso posible. La raz\u00f3n va mucho m\u00e1s all\u00e1 de saber la hora. Cuanto m\u00e1s preciso es un reloj, m\u00e1s f\u00e1cil resulta detectar peque\u00f1as anomal\u00edas en el comportamiento del universo. Una desviaci\u00f3n imperceptible para un reloj de bolsillo podr\u00eda marcar la diferencia al investigar cambios en las constantes fundamentales de la f\u00edsica o la influencia de fen\u00f3menos a\u00fan desconocidos.<\/p>\n<p>Durante d\u00e9cadas, los relojes at\u00f3micos ocuparon la cima de la precisi\u00f3n, ya que miden transiciones energ\u00e9ticas entre electrones. Al registrar la frecuencia exacta con la que absorben luz, generan una referencia extremadamente estable, una especie de metr\u00f3nomo natural que no depende de engranajes ni <a href=\"https:\/\/es.wired.com\/articulos\/el-tiempo-en-marte-corre-distinto-el-reloj-se-mueve-477-microsegundos-mas-rapido-que-en-la-tierra\">cron\u00f3metros tradicionales<\/a>. Cada oscilaci\u00f3n funciona como un \u201ctic\u201d del reloj. Tan confiable es este mecanismo que la humanidad utiliza una transici\u00f3n at\u00f3mica de cesio para definir oficialmente cu\u00e1nto dura un segundo.<\/p>\n<p>Sin embargo, mientras los relojes at\u00f3micos se consolidaban como el est\u00e1ndar mundial, los f\u00edsicos persegu\u00edan una idea a\u00fan m\u00e1s ambiciosa: <strong>el reloj nuclear<\/strong>. Estos dispositivos siguen el mismo principio b\u00e1sico, pero en lugar de observar electrones, observan transiciones energ\u00e9ticas dentro del <a href=\"https:\/\/es.wired.com\/articulos\/investigadores-logran-controlar-el-movimiento-de-atomos-como-si-fueran-juguetes-y-logran-el-hiperentrelazamiento-cuantico\">n\u00facleo at\u00f3mico.<\/a><\/p>\n<hr>\n<div class=\"ContentCardEmbedWrapper-hkvhYu kMYDit content-card-embed content-card-embed--stacked\" data-testid=\"ContentCardEmbedWrapper\" readability=\"18.380165289256\">\n<div class=\"ContentCardEmbedImage-bqahne fjmzkP content-card-embed__image\" data-testid=\"ContentCardEmbedImage\"><span class=\"SpanWrapper-kFnjvc eKnjjD responsive-asset\"><picture class=\"ResponsiveImagePicture-jKunQM gjCCFj responsive-image\"><img decoding=\"async\" alt=\"Reloj de Juicio Final.\" loading=\"lazy\" class=\"ResponsiveImageContainer-dkeESL cQPiWi responsive-image__image\" srcset=\"https:\/\/media.es.wired.com\/photos\/697926dbeb9a279303e3b4d9\/master\/w_120,c_limit\/GettyImages-1459101668.jpg 120w, https:\/\/media.es.wired.com\/photos\/697926dbeb9a279303e3b4d9\/master\/w_240,c_limit\/GettyImages-1459101668.jpg 240w, https:\/\/media.es.wired.com\/photos\/697926dbeb9a279303e3b4d9\/master\/w_320,c_limit\/GettyImages-1459101668.jpg 320w, https:\/\/media.es.wired.com\/photos\/697926dbeb9a279303e3b4d9\/master\/w_640,c_limit\/GettyImages-1459101668.jpg 640w\" sizes=\"100vw\" src=\"https:\/\/media.es.wired.com\/photos\/697926dbeb9a279303e3b4d9\/master\/w_775%2Cc_limit\/GettyImages-1459101668.jpg\"><\/picture><\/span><\/div>\n<div class=\"ContentCardEmbedInfo-buyHWH gWLOee\" readability=\"19.528925619835\">\n<div class=\"BaseText-fEwdHD ContentCardEmbedHed-kDKGDs fUtEc dlHXUJ content-card-embed__hed\" data-testid=\"ContentCardEmbedHed\"><a class=\"BaseLink-haTOKm ContentCardEmbedHedLink-iBZsco gAoKdC hhUFQU content-card-embed__hed-link link\" href=\"https:\/\/es.wired.com\/articulos\/el-reloj-del-juicio-final-esta-en-la-hora-mas-critica-de-la-historia-85-segundos-para-la-medianoche\" data-testid=\"ContentCardEmbedHedLink\">El Reloj del Juicio Final est\u00e1 en la hora m\u00e1s cr\u00edtica de la historia: 85 segundos para la medianoche<\/a><\/div>\n<p>Desde su punto m\u00e1s seguro en 1991, el Reloj del Juicio Final ha avanzado 935 segundos. Es el nivel de riesgo m\u00e1s alto desde su creaci\u00f3n.<\/p>\n<\/div>\n<\/div>\n<hr>\n<h2>\u00bfPor qu\u00e9 construir un reloj nuclear?<\/h2>\n<p>En teor\u00eda, un reloj nuclear podr\u00eda superar a uno at\u00f3mico en precisi\u00f3n y estabilidad porque el n\u00facleo permanece mucho m\u00e1s aislado del entorno. Los electrones ocupan la regi\u00f3n m\u00e1s externa del \u00e1tomo, mientras que el n\u00facleo es hasta 100,000 veces m\u00e1s peque\u00f1o. Ese aislamiento natural podr\u00eda convertir las oscilaciones nucleares en una referencia temporal m\u00e1s estable que las transiciones electr\u00f3nicas utilizadas por los relojes actuales.<\/p>\n<p>Los cient\u00edficos llevan al menos dos d\u00e9cadas debatiendo c\u00f3mo construir un reloj nuclear funcional. La propuesta m\u00e1s prometedora gir\u00f3 alrededor del torio-229, un is\u00f3topo atractivo porque puede excitarse con la energ\u00eda de un l\u00e1ser de laboratorio. La mayor\u00eda de las transiciones nucleares requieren <a href=\"https:\/\/es.wired.com\/articulos\/un-nuevo-estallido-de-rayos-gamma-extragalactico-tiene-consternados-a-los-astronomos\">rayos gamma extremadamente energ\u00e9ticos<\/a>, lo que las vuelve poco pr\u00e1cticas para construir un reloj. El problema era que nadie conoc\u00eda con suficiente precisi\u00f3n la frecuencia exacta de la transici\u00f3n del torio-229. Sin ese dato, la idea de fabricar un reloj nuclear era inviable.<\/p>\n<p>Esa situaci\u00f3n podr\u00eda estar cambiando. Equipos de investigaci\u00f3n en distintas partes del mundo han comenzado a poner en marcha los primeros prototipos funcionales. Aunque todav\u00eda est\u00e1n lejos de alcanzar todo su potencial, estos dispositivos ya dejaron de ser una idea te\u00f3rica para convertirse en instrumentos reales que los cient\u00edficos pueden perfeccionar.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Los cient\u00edficos est\u00e1n obsesionados con construir el&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":294131,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[46],"tags":[],"class_list":["post-294130","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - 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