Remembering Chen Ning Yang: A Theoretical Physicist Who Left an Indelible Mark on Physics

Chen Ning Yang, a renowned theoretical physicist whose work spanned decades and left an indelible mark on the field of physics, passed away at the age of 103 on Saturday in Beijing. His contributions to physics, particularly in the areas of conservation of parity and the weak force, are still studied and revered today. Yang's work, often described as possessing "aesthetic appeal," has been recognized by the scientific community and beyond, earning him a Nobel Prize in Physics in 1957.

Key Takeaways:

• Chen Ning Yang was born on October 1, 1922, in Hefei, China, to a family of mathematicians. He would become the first Chinese-born laureate of the Nobel Prize in Physics.
• Yang's work on parity conservation, specifically the concept of the weak force ignoring mirror symmetry, revolutionized our understanding of nuclear decays and earned him and his colleague Tsung-Dao Lee the Nobel Prize in 1957.
• In a landmark paper published in The Physical Review, Yang and Lee proposed a method to investigate the existence of two types of kaons, the theta and the tau, which would later be observed to have different decay modes.
• Yang's collaboration with Lee began in the 1950s, resulting in 32 joint papers, but ultimately ended in 1962 due to tensions and personal differences.
• Yang's own account of the origins of the Nobel-winning work on parity conservation gave him most of the credit, whereas his colleague Dr. Lee later published a different account.
• Yang became a prominent figure in promoting basic research in China, serving as director of the Institute of Mathematical Sciences at the Chinese University of Hong Kong and as a professor at his alma mater, Tsinghua University.

Statistics:

• Yang published 32 papers with his co-author Tsung-Dao Lee beginning in 1956.
• Dr. Yang and Dr. Lee were awarded the Nobel Prize in Physics in 1957, at the age of 35 and 34 respectively, making them the first Chinese-born laureates.
• Dr. Yang gave up his United States citizenship in 2015 to become a citizen of China.
• Yang was married twice, first to Chih Li Tu for 53 years, and then to Weng Fan in 2004, at the age of 82.

Sources:

• The New York Times
• ScienceDaily
• Newsday
• The China Daily
• Tsinghua University
• Institute for Advanced Study
• National Bureau of Standards
• National Institute of Standards and Technology