Chen-Ning Yang, the renowned Chinese American physicist who passed away at 103 years old, left behind an indelible mark on our understanding of fundamental forces in physics. Born in Hefei, China, and raised in Beijing, Yang was a prodigious student who graduated from National Southwestern Associated University in Yunnan in 1942.
Yang's academic journey took him to the United States, where he pursued his PhD under the guidance of Edward Teller at the University of Chicago. This marked the beginning of an illustrious career that would take him to the forefront of theoretical physics. In the early 1950s, Yang befriended Tsung-Dao Lee, another young Chinese รฉmigrรฉ, with whom he collaborated on groundbreaking work that challenged the widely accepted "parity laws."
Their pioneering research, which won them the Nobel Prize in Physics in 1957, overthrew the concept of "mirror symmetry" and led to a fundamental shift in our understanding of forces acting on subatomic particles. This breakthrough not only paved the way for Yang-Mills theories but also laid the foundation for modern particle physics.
Yang's work was instrumental in developing quantum field theory, which describes the interactions between fundamental particles like photons, gluons, and W bosons. His insight into local gauge invariance, a key feature of QED, enabled him to conceptualize the existence of massless vector particles that carry electric charge, such as the photon.
However, it was not until the work of Peter Higgs and others in 1964 that Yang's ideas were fully confirmed: the presence of the "Higgs field" gave these particles mass. Today, these massive charged particles are known to be responsible for the weak nuclear force, which governs certain radioactive decays.
Yang's contributions extended beyond particle physics. He made significant contributions to statistical mechanics and condensed matter physics, and played a key role in establishing large-scale research centers in China during his later years.
Throughout his life, Yang was recognized with numerous awards, including the US National Medal of Science (1986) and the Albert Einstein medal in 1995. His work has left an enduring legacy that continues to shape our understanding of fundamental forces in physics.
Yang's academic journey took him to the United States, where he pursued his PhD under the guidance of Edward Teller at the University of Chicago. This marked the beginning of an illustrious career that would take him to the forefront of theoretical physics. In the early 1950s, Yang befriended Tsung-Dao Lee, another young Chinese รฉmigrรฉ, with whom he collaborated on groundbreaking work that challenged the widely accepted "parity laws."
Their pioneering research, which won them the Nobel Prize in Physics in 1957, overthrew the concept of "mirror symmetry" and led to a fundamental shift in our understanding of forces acting on subatomic particles. This breakthrough not only paved the way for Yang-Mills theories but also laid the foundation for modern particle physics.
Yang's work was instrumental in developing quantum field theory, which describes the interactions between fundamental particles like photons, gluons, and W bosons. His insight into local gauge invariance, a key feature of QED, enabled him to conceptualize the existence of massless vector particles that carry electric charge, such as the photon.
However, it was not until the work of Peter Higgs and others in 1964 that Yang's ideas were fully confirmed: the presence of the "Higgs field" gave these particles mass. Today, these massive charged particles are known to be responsible for the weak nuclear force, which governs certain radioactive decays.
Yang's contributions extended beyond particle physics. He made significant contributions to statistical mechanics and condensed matter physics, and played a key role in establishing large-scale research centers in China during his later years.
Throughout his life, Yang was recognized with numerous awards, including the US National Medal of Science (1986) and the Albert Einstein medal in 1995. His work has left an enduring legacy that continues to shape our understanding of fundamental forces in physics.