{"id":13408,"date":"2020-06-23T15:47:00","date_gmt":"2020-06-23T12:47:00","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/quantum-physics-provides-a-way-to-hide-ignorance\/"},"modified":"2020-06-23T15:47:00","modified_gmt":"2020-06-23T12:47:00","slug":"quantum-physics-provides-a-way-to-hide-ignorance","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/quantum-physics-provides-a-way-to-hide-ignorance\/","title":{"rendered":"#Quantum physics provides a way to hide ignorance"},"content":{"rendered":"

“#Quantum physics provides a way to hide ignorance<\/strong>”<\/p>\n

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\"Quantum<\/img>
\n In the classical world, the student\u2019s ignorance is revealed by the teacher\u2019s questions. In the quantum world, the student hides their ignorance using hints written in a quantum alphabet. Credit: Michael Kewming
\n <\/figcaption><\/figure>\n<\/div>\n<\/div>\n

Students can hide their ignorance and answer questions correctly in an exam without their lack of knowledge being detected by teachers\u2014but only in the quantum world.<\/p>\n

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University of Queensland researchers have successfully verified a counterintuitive idea from quantum theory\u2014that ignorance of the whole does not necessarily imply ignorance of the parts\u2014in the lab.<\/p>\n

UQ physicist Dr. Jacqui Romero from the ARC Centre of Excellence for Engineered Quantum Systems (EQUS) said the team’s findings would be important when evaluating security in quantum encryption.
\n“What’s also really nice is that we provide an accessible, real-world interpretation of a statement that comes from pure probability theory,” Dr. Romero said.
\nAccording to classical intuition, ignorance can be traced to a source\u2014if a student’s knowledge of a book is incomplete, a teacher can design a test to probe which parts of the book are unknown to the student.
\nUQ Ph.D. candidate and EQUS experimental physicist Michael Kewming said that this wasn’t always the case in the quantum world.
\n“Our results confirm that the student’s source of ignorance can be concealed from the teacher using quantum systems,” Mr Kewming said. “When we communicate, we use special symbols called letters that form an alphabet. In our study, we do the same thing but we use light to create a quantum alphabet.”
\nAccording to Mr Kewming quantum alphabets have strange properties.
\n“Let’s say the student is sitting an exam that covers two topics, and although they haven’t studied they’ve been given a single hint by a knowledgeable friend,” he said.
\n“In the classical situation, this hint can only be so helpful\u2014providing information about only one topic\u2014and the teacher can still uncover which topic the student is ignorant of. But a hint written using our quantum alphabet could simultaneously contain information about both topics, despite app<\/a>earing to be about only one. As a result, the teacher cannot determine the source of the student’s ignorance because the hint is always useful to the student.”
\nThe UQ research team was able to verify this in a physical experiment by writing information in the shape of single photons\u2014the particles that make up light.
\n“Our result has implications for the security of quantum-based encryption because we have shown that what is true for classical hints is not true for quantum hints,” Dr. Romero said.
\nUnfortunately for students preparing for exams, quantum hints won’t be available outside the lab anytime soon.
\nThe results are published in Physical Review Letters<\/i>.<\/p>\n

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More information:<\/strong>
\n M. J. Kewming et al. Hiding Ignorance Using High Dimensions, Physical Review Letters<\/i> (2020). DOI: 10.1103\/PhysRevLett.124.250401\n <\/div>\n

\n Citation<\/strong>:
\n Quantum physics provides a way to hide ignorance (2020, June 23)
\n retrieved 23 June 2020
\n from https:\/\/phys.org\/news<\/a>\/2020-06-quantum-physics.html<\/p>\n

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
\n part may be reproduced without the written permission. The content is provided for information purposes only.<\/p><\/div>\n<\/p><\/div>\n

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“#Quantum physics provides a way to hide ignorance” In the classical world, the student\u2019s ignorance is revealed by the teacher\u2019s questions. In the quantum world, the student hides their ignorance using hints written in a quantum alphabet. Credit: Michael Kewming Students can hide their ignorance and answer questions correctly in an exam without their lack…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[16],"tags":[10608,26235],"class_list":["post-13408","post","type-post","status-publish","format-standard","hentry","category-sciencee","tag-quantum-physics","tag-quantum-physics-provides-a-way-to-hide-ignorance"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/13408","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=13408"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/13408\/revisions"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=13408"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=13408"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=13408"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}