PDF문서mec seminar poster_prof. jaewan kim.pdf

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Mechanical Engineering

Seminar Series

2022 Nobel Physics Prize and the 
Quantum Information Technology

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Date: Wednesday, November 16th, 2022

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Time: 5:00 PM KST 

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Venue: Academic Building A Room 211

Prof. Jaewan Kim

Prof.  Jaewan  Kim  is  a  Vice  President  of  Korea  Institute 
for  Advanced  Study  (KIAS).  Also,  he  is  a  professor  of 
Computational  Sciences,  KIAS.  He  received  his  Ph.D.  in 
Physics  at  University  of  Houston,  and  B.S  in  Physics  at 
Seoul  National  University.  His  research  focuses  on 
Theoretical Study of Quantum Information Science. Also, 
Prof. Kim was Research associate professor of Physics in 
KAIST. 

Abstract
 Aspect, Clauser, and Zeilinger are receiving 2022 Nobel Prize in physics "for experiments with 
entangled photons, establishing the violation of Bell inequalities and pioneering quantum information 
science." In quantum mechanics, physical quantity is not decided until it is measured. Einstein raised 
questions on this aspect of quantum measurement. He thought physical quantity should be a reality 
which means that physical quantity should be independent of measurement process. In 1935, Einstein, 
Podolsky, and Rosen (EPR) published a paper claiming quantum theory does not seem to be complete 
and presented two particles with correlated physical property demonstrating "spooky action at a 
distance" which is now called in various names; EPR-pair, entangled pair, Bell pair, Bell state and so on. 
In 1964, John Bell proposed a mathematical inequality which must be satisfied by the measurement on 
EPR-pairs if there is "local reality" as Einstein and his colleagues suggested. In 1970's, Clauser 
designed experiments to test Bell's inequality and found that it is violated by Bell pairs. In 1982, Aspect 
improved the experiment to avoid loopholes in Clauser's experiment and demonstrated Bell's inequality 
is indeed violated. Since 1990's up until now, Zeilinger improved the test of Bell's inequality and 
pioneered many fundamental experiments to test quantum theory including the first quantum 
teleportation. Einstein's incessant question on quantum theory played an important role in opening the 
era of quantum information science and technology.