{"id":96954,"date":"2019-10-02T17:44:18","date_gmt":"2019-10-03T00:44:18","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2019\/10\/quantum-vacuum-less-than-zero-energy"},"modified":"2019-10-02T17:44:18","modified_gmt":"2019-10-03T00:44:18","slug":"quantum-vacuum-less-than-zero-energy","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2019\/10\/quantum-vacuum-less-than-zero-energy","title":{"rendered":"Quantum vacuum: Less than zero energy"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/quantum-vacuum-less-than-zero-energy2.jpg\"><\/a><\/p>\n<p>Energy is a quantity that must always be positive\u2014at least that\u2019s what our intuition tells us. If every single particle is removed from a certain volume until there is nothing left that could possibly carry energy, then a limit has been reached. Or has it? Is it still possible to extract energy even from empty space?<\/p>\n<p>Quantum physics has shown time and again that it contradicts our intuition, which is also true in this case. Under certain conditions, negative energies are allowed, at least in a certain range of space and time. An international research team at the TU Vienna, the Universit\u00e9 libre de Bruxelles (Belgium) and the IIT Kanpur (India) have now investigated the extent to which negative <a href=\"https:\/\/phys.org\/tags\/energy\/\" rel=\"tag\" class=\"\">energy<\/a> is possible. It turns out that no matter which quantum theories are considered, no matter what symmetries are assumed to hold in the universe, there are always certain limits to \u201cborrowing\u201d energy. Locally, the energy can be less than zero, but like money borrowed from a bank, this energy must be \u201cpaid back\u201d in the end.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Energy is a quantity that must always be positive\u2014at least that\u2019s what our intuition tells us. If every single particle is removed from a certain volume until there is nothing left that could possibly carry energy, then a limit has been reached. Or has it? Is it still possible to extract energy even from empty [\u2026]<\/p>\n","protected":false},"author":513,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48,1617],"tags":[],"class_list":["post-96954","post","type-post","status-publish","format-standard","hentry","category-particle-physics","category-quantum-physics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/96954","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\/513"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=96954"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/96954\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=96954"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=96954"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=96954"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}