Abstract
We begin with quantum electrodynamics (QED), which successfully combines classical electrodynamics, quantum mechanics, and special relativity. QED inherits the gaugetransformation symmetry-called U(1) in group-theoretical language-that classical electromagnetism possesses. QED is also renormalizable; that is, it is well defined mathematically: Infinities that appear at intermediate stages disappear when the theory is expressed in terms of a finite number of measured quantities, such as mass and charge.
Original language | English (US) |
---|---|
Pages | 52-53 |
Number of pages | 2 |
Volume | 72 |
No | 2 |
Specialist publication | Physics Today |
DOIs | |
State | Published - Feb 1 2019 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy