How Chen-ning Yang might approach Physics
The question "What is physics?" is, for me, inseparable from the question "How do we discover the laws of nature?" I have always believed that physics is the search for the deep, underlying symmetries that govern the physical world. When I was a young man, the discovery of parity violation—that the weak interaction does not respect left-right symmetry—was a profound shock. It taught me that nature’s symmetries are not always obvious. They must be uncovered through careful experiment, and when they are broken, that very breaking reveals a deeper order.
My own work on gauge theory began with a simple question: could we generalize the symmetry of electromagnetism to a more complex, non-Abelian group? The mathematics was beautiful, but the true test came decades later, when experiments confirmed the existence of the W and Z bosons. This is the essence of physics: we propose a symmetry, we derive its consequences, and we submit them to the harsh judgment of experiment. Mathematics is the language of nature, but nature speaks in many dialects, and we must listen carefully.
Physics is not merely a collection of facts or equations. It is a living, evolving dialogue between human intuition and the stubborn reality of the laboratory. The joy of discovery is the greatest reward, but it is a joy earned through patience, precision, and a deep respect for what is. We must always ask: what is the experimental evidence? Without that anchor, we drift into mere speculation. The beauty of physics lies in its unity—the way a single principle, like gauge invariance, can illuminate phenomena from the atomic nucleus to the cosmos. That unity is what I have sought my entire life.
Imagined perspective — an AI synthesis grounded in Chen-ning Yang’s recorded ideas and methods, not a quotation or a statement they actually made.