Quantum Gravity Theories
QG
양자 중력
양자역학의 원리와 일반적인 상대성이론을 조화시키기 위해 양자중력이론이 필요하지만, 존재할 것이라고 예측되는 중력 보손을 통해 양자장이론의 일반적인 방법을 중력에 적용할 때 어려움이 발생한다. 문제는 이런 방식으로 얻는 이론은 재규격화 가 불가능하다는 것인데, 질량과 같은 관측 가능한 물체의 특성에 대해 무한한 값을 예측하기 때문에 질량과 같은 물질의 특성에 대해 의미있는 값을 도출해 낼 수 없다.
https://ko.wikipedia.org/wiki/%EC%96%91%EC%9E%90_%EC%A4%91%EB%A0%A5
The Digital Quest for Quantum Gravity
Could the key to understanding quantum gravity, one of the most sought-after theories in physics, be much more elementary than many physicists believe? Theoretical physicist Renate Loll has developed an elegant theory called Causal Dynamical Triangulations (CDT) that has produced surprising findings while simulating quantum gravity inside a computer. Her research may one day lead to new insights into how the fabric of space-time formed.
00:00 Is string theory and loop quantum gravity theory wrong?
01:40 What is quantum gravity and how do you develop a theory of it?
02:05 Causal Dynamical Triangulations theory (CDT)
03:27 Computer-simulated quantum gravity revealed a 4D universe
04:28 The future of quantum gravity research
Read the full article at Quanta Magazine: https://www.quantamagazine.org/renate-loll-blends-universes-to-unlock-quantum-gravity-20230525/
Learn more about Quantum Field Theory: https://www.quantamagazine.org/what-is-quantum-field-theory-and-why-is-it-incomplete-20220810/
Read an explainer of the path integral in Quanta: https://www.quantamagazine.org/how-our-reality-may-be-a-sum-of-all-possible-realities-20230206/
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Quanta Magazine is an editorially independent publication supported by the Simons Foundation: https://www.simonsfoundation.org/
#Quantum #Gravity #physics #generalrelativity
https://www.youtube.com/watch?v=A7NTNkYPr9Q


Seonglae Cho