{"id":4258,"date":"2026-05-11T08:52:09","date_gmt":"2026-05-11T08:52:09","guid":{"rendered":"https:\/\/greekablessingindisguise.com\/philoquantum-book-2\/i-pliroforia-den-chanetai-pote\/"},"modified":"2026-08-31T13:29:58","modified_gmt":"2026-08-31T13:29:58","slug":"i-pliroforia-den-chanetai-pote","status":"publish","type":"page","link":"https:\/\/greekablessingindisguise.com\/en\/philoquantum-book-2\/i-pliroforia-den-chanetai-pote\/","title":{"rendered":"Information Is Never Lost"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"4258\" class=\"elementor elementor-4258 elementor-2980\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9e1758d e-flex e-con-boxed e-con e-parent\" data-id=\"9e1758d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-941bf73 elementor-widget elementor-widget-html\" data-id=\"941bf73\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<div class=\"qn-card\">\r\n\r\n    <h2 class=\"qn-title\">\r\n        <i class=\"fas fa-infinity\" style=\"color:#c8a96a;\"><\/i>\r\n        Quantum Nugget #24 \u2014 Is Information Never Lost?\r\n    <\/h2>\r\n\r\n    <div class=\"qn-image\">\r\n        <img decoding=\"async\" src=\"https:\/\/greekablessingindisguise.com\/wp-content\/uploads\/2026\/05\/QUANTUM-NUGGET-23.jpg\" alt=\"Information is never lost\">\r\n    <\/div>\r\n\r\n    <div class=\"qn-content\">\r\n\r\n        <p class=\"qn-section-title\">\r\n            <i class=\"fas fa-database\"><\/i>\r\n            Preservation, Scrambling and the Mystery of Black Holes\r\n        <\/p>\r\n\r\n        <p>\r\n            <strong>Terms of the Day:<\/strong><br>\r\n            <em>Quantum Information \u2014 Unitary Evolution<\/em>\r\n        <\/p>\r\n\r\n        <hr class=\"qn-separator\">\r\n\r\n        <p>\r\n            In everyday life, information seems to disappear constantly.\r\n        <\/p>\r\n\r\n        <p>\r\n            A letter burns.\r\n        <\/p>\r\n\r\n        <p>\r\n            A file is deleted.\r\n        <\/p>\r\n\r\n        <p>\r\n            A memory fades.\r\n        <\/p>\r\n\r\n        <p>\r\n            A fragrance disperses into the air.\r\n        <\/p>\r\n\r\n        <p>\r\n            Quantum mechanics, however, introduces a deeper meaning\r\n            of information.\r\n        <\/p>\r\n\r\n        <p class=\"qn-highlight\">\r\n            <i class=\"fas fa-lightbulb\"><\/i>\r\n            It does not refer to the meaning of a message or to our\r\n            personal memories. It refers to everything required for\r\n            a complete description of the quantum state of a\r\n            physical system.\r\n        <\/p>\r\n\r\n        <hr class=\"qn-separator\">\r\n\r\n        <p class=\"qn-section-title\">\r\n            <i class=\"fas fa-sync-alt\"><\/i>\r\n            Unitary Evolution\r\n        <\/p>\r\n\r\n        <p>\r\n            In standard quantum mechanics, the state of an ideally\r\n            isolated system evolves <strong>unitarily<\/strong>.\r\n        <\/p>\r\n\r\n        <p>\r\n            This means that its evolution is reversible in principle:\r\n            if we knew the final quantum state with perfect accuracy,\r\n            together with every law governing its evolution, we could\r\n            mathematically reconstruct the initial state.\r\n        <\/p>\r\n\r\n        <p class=\"qn-highlight\">\r\n            <i class=\"fas fa-infinity\"><\/i>\r\n            Information is not erased by this evolution.\r\n            It is transformed.\r\n        <\/p>\r\n\r\n        <hr class=\"qn-separator\">\r\n\r\n        <p class=\"qn-section-title\">\r\n            <i class=\"fas fa-tint\"><\/i>\r\n            Lost or Dispersed?\r\n        <\/p>\r\n\r\n        <p>\r\n            Imagine a drop of ink placed in a glass of water.\r\n        <\/p>\r\n\r\n        <p>\r\n            After a while, the ink has spread throughout the glass.\r\n            The original drop is no longer visible, and restoring\r\n            it to its earlier form would be extraordinarily difficult.\r\n        <\/p>\r\n\r\n        <p>\r\n            Its molecules have not vanished.\r\n        <\/p>\r\n\r\n        <p>\r\n            The information about its evolution has become dispersed\r\n            among countless microscopic positions, motions and\r\n            correlations.\r\n        <\/p>\r\n\r\n        <p>\r\n            Something similar can occur in a complex quantum system.\r\n        <\/p>\r\n\r\n        <p>\r\n            Information may become so deeply distributed among\r\n            correlations between the system and its environment\r\n            that recovering it is practically impossible.\r\n        <\/p>\r\n\r\n        <p class=\"qn-highlight\">\r\n            <i class=\"fas fa-random\"><\/i>\r\n            This is often described as the\r\n            <strong>scrambling of information<\/strong>.\r\n        <\/p>\r\n\r\n        <hr class=\"qn-separator\">\r\n\r\n        <p class=\"qn-section-title\">\r\n            <i class=\"fas fa-project-diagram\"><\/i>\r\n            The Part and the Whole\r\n        <\/p>\r\n\r\n        <p>\r\n            A small quantum system is rarely isolated.\r\n            It interacts and becomes entangled with its environment.\r\n        <\/p>\r\n\r\n        <p>\r\n            If we examine only the small system, some of its\r\n            information appears to have been lost.\r\n        <\/p>\r\n\r\n        <p>\r\n            If we could describe the system\r\n            <strong>together with its entire environment<\/strong>,\r\n            however, that information might still be present\r\n            in the correlations between them.\r\n        <\/p>\r\n\r\n        <p>\r\n            This is the crucial distinction:\r\n        <\/p>\r\n\r\n        <p class=\"qn-highlight\">\r\n            <i class=\"fas fa-eye-slash\"><\/i>\r\n            <strong>\r\n                Information may be lost to our access without\r\n                disappearing from the complete physical description.\r\n            <\/strong>\r\n        <\/p>\r\n\r\n        <hr class=\"qn-separator\">\r\n\r\n        <p class=\"qn-section-title\">\r\n            <i class=\"fas fa-flask\"><\/i>\r\n            Measurement and Irreversibility\r\n        <\/p>\r\n\r\n        <p>\r\n            When we perform a quantum measurement, we obtain\r\n            a particular result.\r\n        <\/p>\r\n\r\n        <p>\r\n            In practice, that result alone does not allow us\r\n            to reconstruct the complete earlier quantum state.\r\n        <\/p>\r\n\r\n        <p>\r\n            Interaction with the measuring instrument and the\r\n            environment distributes information among an enormous\r\n            number of degrees of freedom.\r\n        <\/p>\r\n\r\n        <p>\r\n            How this process should ultimately be understood depends\r\n            partly upon the interpretation of quantum mechanics.\r\n        <\/p>\r\n\r\n        <p class=\"qn-point\">\r\n            <i class=\"fas fa-exclamation-circle\"><\/i>\r\n            We must not, therefore, turn the phrase \u201cinformation\r\n            is never lost\u201d into an unlimited metaphysical law.\r\n        <\/p>\r\n\r\n        <hr class=\"qn-separator\">\r\n\r\n        <p class=\"qn-section-title\">\r\n            <i class=\"fas fa-circle\"><\/i>\r\n            Black Holes and the Information Paradox\r\n        <\/p>\r\n\r\n        <p>\r\n            Black holes created one of the deepest conflicts\r\n            in modern theoretical physics.\r\n        <\/p>\r\n\r\n        <p>\r\n            According to Hawking, a black hole can emit thermal\r\n            radiation and eventually evaporate.\r\n        <\/p>\r\n\r\n        <p>\r\n            If that radiation contains no information about the\r\n            matter that entered the black hole, the original\r\n            information appears to have been destroyed.\r\n        <\/p>\r\n\r\n        <p class=\"qn-highlight\">\r\n            <i class=\"fas fa-question-circle\"><\/i>\r\n            This conflicts with unitary quantum evolution and creates\r\n            the <strong>Black Hole Information Paradox<\/strong>.\r\n        <\/p>\r\n\r\n        <p>\r\n            Many physicists expect a complete theory of quantum\r\n            gravity ultimately to preserve the information, perhaps\r\n            in an extraordinarily scrambled form within the radiation.\r\n        <\/p>\r\n\r\n        <p class=\"qn-point\">\r\n            <i class=\"fas fa-flask\"><\/i>\r\n            We do not yet possess a complete, experimentally\r\n            confirmed solution.\r\n        <\/p>\r\n\r\n        <hr class=\"qn-separator\">\r\n\r\n        <p class=\"qn-section-title\">\r\n            <i class=\"fas fa-ban\"><\/i>\r\n            What It Does Not Mean\r\n        <\/p>\r\n\r\n        <p>\r\n            The preservation of quantum information does not prove that:\r\n        <\/p>\r\n\r\n        <ul>\r\n            <li>Every human memory remains recoverable.<\/li>\r\n            <li>\r\n                A destroyed photograph continues to exist somewhere\r\n                intact.\r\n            <\/li>\r\n            <li>Personality survives bodily death.<\/li>\r\n            <li>\r\n                The Universe is conscious and remembers everything.\r\n            <\/li>\r\n        <\/ul>\r\n\r\n        <p class=\"qn-point\">\r\n            <i class=\"fas fa-balance-scale\"><\/i>\r\n            These are different philosophical or religious questions.\r\n            They do not follow from the mathematical concept of\r\n            quantum information.\r\n        <\/p>\r\n\r\n        <hr class=\"qn-separator\">\r\n\r\n        <p class=\"qn-section-title\">\r\n            <i class=\"fas fa-feather-alt\"><\/i>\r\n            A Poetic Bridge\r\n        <\/p>\r\n\r\n        <p>\r\n            Physics offers us an image subtler than\r\n            \u201cnothing is ever lost.\u201d\r\n        <\/p>\r\n\r\n        <p>\r\n            Whatever occurs may leave traces, alter correlations\r\n            and influence what follows.\r\n        <\/p>\r\n\r\n        <p>\r\n            Yet those traces may become so widely dispersed that\r\n            no observer could reconstruct their history.\r\n        <\/p>\r\n\r\n        <p>\r\n            Poetry may say:\r\n        <\/p>\r\n\r\n        <p class=\"qn-highlight\">\r\n            <i class=\"fas fa-quote-left\"><\/i>\r\n            <em>Nothing departs without touching the world.<\/em>\r\n        <\/p>\r\n\r\n        <p>\r\n            Physics would add:\r\n        <\/p>\r\n\r\n        <p class=\"qn-highlight\">\r\n            <i class=\"fas fa-link\"><\/i>\r\n            <em>\r\n                The touch may remain within correlations \u2014 even\r\n                when we can no longer read it.\r\n            <\/em>\r\n        <\/p>\r\n\r\n        <hr class=\"qn-separator\">\r\n\r\n        <p class=\"qn-point\">\r\n            <i class=\"fas fa-brain\"><\/i>\r\n            <strong>Keep This in Mind:<\/strong>\r\n        <\/p>\r\n\r\n        <p class=\"qn-highlight\">\r\n            <i class=\"fas fa-database\"><\/i>\r\n            <strong>\r\n                In ideal unitary quantum evolution, information\r\n                is not destroyed.<br>\r\n                It may, however, become so thoroughly scrambled\r\n                that it is practically inaccessible.\r\n            <\/strong>\r\n        <\/p>\r\n\r\n        <p>\r\n            Fundamental preservation is one thing.\r\n        <\/p>\r\n\r\n        <p>\r\n            Human recoverability is another.\r\n        <\/p>\r\n\r\n        <p>\r\n            <em>\r\n                Visual note: The transition from the luminous cloud\r\n                to the network symbolises the dispersal of information\r\n                across many correlations. It is not a literal\r\n                representation of quantum data.\r\n            <\/em>\r\n        <\/p>\r\n\r\n        <hr class=\"qn-separator\">\r\n\r\n        <p>\r\n            <small>\r\n                <strong>Scientific references:<\/strong>\r\n                The state of an isolated quantum system evolves\r\n                unitarily, preserving quantum information.\r\n                In open systems, information may pass into correlations\r\n                with the environment and become inaccessible.\r\n                Whether and how information is preserved during\r\n                the complete evaporation of a black hole constitutes\r\n                the Information Paradox and is connected with the\r\n                still-unfinished search for a theory of quantum gravity.\r\n                <a href=\"https:\/\/ocw.mit.edu\/courses\/6-453-quantum-optical-communication-fall-2016\/d9beb82c9d4f3ac411496eb0633e8aee_MIT6_453F16_Lect2_Notes.pdf\"\r\n                   target=\"_blank\" rel=\"noopener noreferrer\">\r\n                    MIT OpenCourseWare \u2014 Unitary Quantum Evolution\r\n                <\/a>\r\n                \u00b7\r\n                <a href=\"https:\/\/plato.stanford.edu\/entries\/spacetime-singularities\/\"\r\n                   target=\"_blank\" rel=\"noopener noreferrer\">\r\n                    Stanford Encyclopedia of Philosophy \u2014 Black Holes and Information Loss\r\n                <\/a>\r\n            <\/small>\r\n        <\/p>\r\n\r\n    <\/div>\r\n\r\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a539f85 elementor-widget elementor-widget-html\" data-id=\"a539f85\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<a href=\"#\" onclick=\"goBack(event)\" class=\"qn-back-link\">\r\n    <i class=\"fas fa-arrow-left\"><\/i>\r\n \u0395\u03c0\u03b9\u03c3\u03c4\u03c1\u03bf\u03c6\u03ae\r\n<\/a>\r\n\r\n<script>\r\nfunction goBack(e) {\r\n    e.preventDefault();\r\n\r\n    if (document.referrer && document.referrer !== window.location.href) {\r\n        history.back();\r\n    } else {\r\n        window.location.href = \"\/philoquantum-book\/\";\r\n    }\r\n}\r\n<\/script>\r\n<style>\r\n    .qn-back-link {\r\n\r\n    font-size: 15px;\r\n    color: #777;\r\n    text-decoration: none;\r\n    letter-spacing: 0.5px;\r\n    transition: 0.2s;\r\n}\r\n\r\n.qn-back-link i {\r\n    margin-right: 6px;\r\n    color: #c8a96a;\r\n}\r\n\r\n.qn-back-link:hover {\r\n    color: #000;\r\n}\r\n<\/style>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Quantum Nugget #24 \u2014 Is Information Never Lost? Preservation, Scrambling and the Mystery of Black Holes Terms of the Day: Quantum Information \u2014 Unitary Evolution In everyday life, information seems to disappear constantly. A letter burns. A file is deleted. A memory fades. A fragrance disperses into the air. Quantum mechanics, however, introduces a deeper [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3879,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":{"_acf_changed":false,"_eb_attr":"","_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":"","footnotes":""},"class_list":["post-4258","page","type-page","status-publish","hentry"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":8}},"acf":[],"_hostinger_reach_plugin_has_subscription_block":false,"_hostinger_reach_plugin_is_elementor":false,"_links":{"self":[{"href":"https:\/\/greekablessingindisguise.com\/en\/wp-json\/wp\/v2\/pages\/4258","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/greekablessingindisguise.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/greekablessingindisguise.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/greekablessingindisguise.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/greekablessingindisguise.com\/en\/wp-json\/wp\/v2\/comments?post=4258"}],"version-history":[{"count":8,"href":"https:\/\/greekablessingindisguise.com\/en\/wp-json\/wp\/v2\/pages\/4258\/revisions"}],"predecessor-version":[{"id":6812,"href":"https:\/\/greekablessingindisguise.com\/en\/wp-json\/wp\/v2\/pages\/4258\/revisions\/6812"}],"up":[{"embeddable":true,"href":"https:\/\/greekablessingindisguise.com\/en\/wp-json\/wp\/v2\/pages\/3879"}],"wp:attachment":[{"href":"https:\/\/greekablessingindisguise.com\/en\/wp-json\/wp\/v2\/media?parent=4258"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}