Who did the 1957 winner of the Nobel Prize in Physics work with on the problem of magnetic flux?
Byers-Yang theorem: In quantum mechanics, the Byers-Yang theorem states that all physical properties of a doubly connected system (an annulus) enclosing a magnetic flux formula_1 through the opening are periodic in the flux with period formula_2 (the magnetic flux quantum). Byers-Yang theorem:  The theorem was first stated and proven by Nina Byers and Chen-Ning Yang (1961), and further developed by Felix Bloch (1970). Chen-Ning Yang: Chen-Ning Frank Yang, also known as Yang Zhenning (; born October 1, 1922), is a Chinese physicist who works on statistical mechanics and particle physics. Chen-Ning Yang:  He and Tsung-dao Lee received the 1957 Nobel Prize in Physics for their work on parity nonconservation of weak interaction.
Nina Byers