{"id":97245,"date":"2024-09-05T14:41:30","date_gmt":"2024-09-05T14:41:30","guid":{"rendered":"https:\/\/www.uri.edu\/news\/?p=97245"},"modified":"2025-03-18T20:30:00","modified_gmt":"2025-03-18T20:30:00","slug":"theoretical-research-establishes-unified-way-to-quantify-vital-quantum-properties","status":"publish","type":"post","link":"https:\/\/www.uri.edu\/news\/2024\/09\/theoretical-research-establishes-unified-way-to-quantify-vital-quantum-properties\/","title":{"rendered":"Theoretical research establishes unified way to quantify vital quantum properties<\/strong>"},"content":{"rendered":"\n

KINGSTON, R.I. \u2013 Sept. 5, 2024 \u2013 The foundation of nearly all quantum information applications \u2013 such as computation and communication \u2013 rely on the quantum properties of superposition and entanglement.<\/p>\n\n\n\n

In quantum computers \u2013 which hold the promise of performing complex calculations that today\u2019s classical computers can\u2019t handle \u2013 superposition and entanglement go hand in hand. While superposition allows a physical system \u2013 like a particle \u2013 to be in multiple states simultaneously, entanglement links particles allowing them to form an inseparable state, even when they are separated by a large distance. <\/p>\n\n\n\n

\u201cThey are the fundamental properties of quantum mechanics, the determining properties for many applications,\u201d said Wenchao Ge, assistant professor of physics at the äçÐÄvlogÃâ·ÑBÕ¾, whose theoretical research explores fundamental issues in quantum mechanics. \u201cWithout superposition and entanglement, no quantum-enhanced application would exist.\u201d<\/p>\n\n\n\n

In recent theoretical research, Ge and collaborators Jiru Liu and M. Suhail Zubairy, members of the Institute for Quantum Science and Engineering at Texas A&M University, explored the relationship between the two fundamental resources to quantum physics. They established a single way to quantify the two properties, defining a mathematical description of each. Their paper, \u201cClassical-Nonclassical Polarity of Gaussian States,\u201d was published<\/a> in the prestigious Physical Review Letters.<\/p>\n\n\n\n

\u201cIt\u2019s theoretical proof that the two properties \u2013 superposition and entanglement \u2013 can be interchanged quantitatively,\u201d said Ge. \u201cOur work discovers an important quantitative relation between these two fundamental quantum effects for a large class of quantum states. This work opens a new direction of research in quantifying these resources for quantum information processing.\u201d<\/p>\n\n\n\n

The ability to quantify the properties allows for the conversion of these two resources from one state to the other. \u201cSometimes in quantum mechanics, one resource may be difficult to prepare,\u201d said Ge. \u201cIf you could have the other type of resource, you can convert between these resources.\u201d<\/p>\n\n\n\n

In the field of quantum mechanics, there has been interest in understanding and application of nonclassical resources \u2013 resources that do not have a classical counterpart, such as a particle in a state with a negative probability. But research has fallen short in coming up with a satisfactory unified evaluation of both properties, Ge said.<\/p>\n\n\n\n

The researchers wanted to explore the internal relationship between the two quantum properties, which determine many high-level quantum applications such as computation, communication and sensing. To do so, they looked at Gaussian states, a large class of states in quantum mechanics known for their ease in reproducing and manipulation during quantum information experiments.<\/p>\n\n\n\n

Previous studies have looked at quantitative relationships of the two properties for two-mode or three-mode (two or three particle) Guassian states.  The team advanced the research, proposing a single measure for quantum superposition in one-particle systems and entanglement between multiple particles (two or three particle modes). The new measure, \u201cclassical-nonclassical polarity,\u201d is shown to unify the two effects quantitatively for a large class of Gaussian states, Ge said. <\/p>\n\n\n\n

Ge said the work can form a foundation for exploring other quantum properties for information applications such as quantum sensing and computing.<\/p>\n\n\n\n

\u201cThis is the first step in finding a quantitative relation between these two properties,\u201d said Ge. \u201cFor Gaussian states, we have only proved this relationship up to three modes. It may be useful to study four, five or even more bipartite. We conjecture such a quantitative relation even beyond Gaussian states.<\/p>\n\n\n\n

\u201cFor physics research, we want to see what are the properties, what are the fundamental principles,\u201d he added. \u201cIf we discover a fundamental principle, there could be far-reaching applications.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"

KINGSTON, R.I. \u2013 Sept. 5, 2024 \u2013 The foundation of nearly all quantum information applications \u2013 such as computation and communication \u2013 rely on the quantum properties of superposition and entanglement. In quantum computers \u2013 which hold the promise of performing complex calculations that today\u2019s classical computers can\u2019t handle \u2013 superposition and entanglement go hand […]<\/p>\n","protected":false},"author":25,"featured_media":97246,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[1905],"class_list":["post-97245","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-archives","tag-research"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/posts\/97245","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/users\/25"}],"replies":[{"embeddable":true,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/comments?post=97245"}],"version-history":[{"count":3,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/posts\/97245\/revisions"}],"predecessor-version":[{"id":97249,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/posts\/97245\/revisions\/97249"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/media\/97246"}],"wp:attachment":[{"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/media?parent=97245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/categories?post=97245"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.uri.edu\/news\/wp-json\/wp\/v2\/tags?post=97245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}