Public Lecture: Quantum entanglement and 2022 Nobel Prize in Physics
The mass lecture was held in both face-to-face and online formats via the zoom platform
Assoc. Prof. Dr. Nguyen Ai Viet, Vietnam National University, Hanoi, with the lecture "The theoretical and practical significance of experimental verification of quantum non-locality"
Assoc. Prof. Dr. Nguyen Ai Viet, Vietnam National University, Hanoi, presented the lecture "The theoretical and practical significance of experimental verification of quantum non-locality.” According to Assoc. Dr. Nguyen Ai Viet, until now, the debate on the basis of quantum mechanics has not stopped bringing new concepts and practical consequences. One of the important concepts of classical physics is that the locality and propagation of interactions in space-time have become difficult to reconcile in relativity theory and quantum mechanics. To solve this problem, modern physics on the one hand aims to perfect quantum mechanics with hidden variables, and on the other hand, admits quantum non-locality. Experimental testing of quantum non-locality will determine the basis of a new world system. Experiments on quantum non-locality were started by John Clauser in the 1960s, completed by Alain Aspect and filled in holes in the 1980s, and applied by Anton Zeilinger to communication, opening the period of the rapid development of quantum information. The 2022 Nobel Prize in Physics has confirmed quantum non-locality thanks to these experimental results.
Assoc. Prof. Dr. Nguyen Ba An, Thang Long Institute of Mathematics and Applied Science, Thang Long University presented the lecture "On Bell's inequality". Bell's inequality, introduced by John Bell in 1964, was considered the most profound discovery in science. It allowed to settle the 30-year debate between Albert Einstein and Niel Bohr. The 2022 Nobel Prize in Physics was awarded to Alain Aspect, John Clauser and Anton Zeilinger for their experiments that confirmed the violation of Bell's inequality. The report focuses on the derivation of the Bell inequality and its far-reaching implications after briefly mentioning quantum bits, quantum entanglement, EPR paradox, localized realism, and hidden variables.
Dr. Nguyen Quoc Hung, Vietnam National University, Hanoi, gave a lecture "Three experiments on polarized light leading to the 2022 Nobel Prize in Physics". According to Dr. Nguyen Quoc Hung, the 2022 Nobel Prize in Physics was awarded to the authors of three experiments that confirmed the existence of quantum entanglement and quantum non-locality. In 1972, Clausser used a pair of co-polarized light emitted by Ca atoms to observe their nonlocal relationship. In 1982, Aspect repeated the experiment but only randomly measured to rule out hidden mechanisms. But this metric system is small in size, so local relationships have not been eliminated. In the 1990s, Zeilinger repeated similar experiments at distances of up to several kilometers to confirm that the correlation of polarized light was non-local. The sequence of increasingly precise experiments to remove holes, even from mechanisms we don't know yet, is a natural evolution of Physics. Although in the future quantum physics may be replaced by a better theory, this theory must still explain quantum entanglement and non-locality as verified facts.
In the past time, the Institute of Mathematics, the Vietnam Physics Association, the Institute of Physics and the Institute for Scientific Information have coordinated to organize many public lectures with different topics. This activity aims to strengthen science communication and spread the love of science and technology to everyone, especially young people who are passionate about scientific research.
Translated by Tuyet Nhung
Link to Vietnamese version
