Understanding and refining the gyromagnetic issue, or “g issue,” is greater than a theoretical pursuit—it straight impacts how we enhance real-world instruments like MRI machines, atomic clocks, and quantum sensors. These applied sciences rely on exactly measuring how tiny particles work together with magnetic fields, and even slight enhancements in that understanding can result in sharper photographs, extra correct timekeeping, and higher sensors.
The g issue is a quantity that helps describe how particles like electrons reply to magnetic fields. It tells us how the electron’s personal magnetic energy pertains to the best way it spins. In earlier work from practically a century in the past, physicist Paul Dirac predicted that this worth can be precisely two. However later discoveries in fashionable physics confirmed that the quantity is barely greater than two. This small distinction, often called the “anomalous magnetic second,” which implies a slight however vital shift within the anticipated magnetic conduct, has grow to be a helpful clue for testing our present theories about how the universe works.
Professor Jing-Ling Chen, Xing-Yan Fan, and Xiang-Ru Xie from Nankai College have launched a daring new concept that might change the best way scientists take into consideration this g issue. Their analysis, printed within the scientific journal Leads to Physics, provides a brand new clarification for why the g issue would possibly change. The idea, which they name “electron-braidon mixing,” reveals that even with out utilizing superior quantum discipline theories—which describe how particles work together on the smallest scales—the g issue of an electron may nonetheless be altered in noticeable methods.
On the heart of this concept is one thing referred to as a “braidon,” a made-up idea primarily based on braiding patterns—just like how threads are woven collectively. These patterns, often called braid relations, are utilized in some areas of physics to elucidate how particles would possibly behave in particular methods, particularly in techniques the place their association issues. Professor Chen’s workforce discovered that the principle equation used to explain an electron’s power, referred to as the Dirac Hamiltonian, could possibly be handled as only one half of a bigger system. On this greater image, two extra variations of this equation naturally seem, every providing a barely totally different view of the identical electron. By combining the common electron with these different types, they created a blended model of the electron that behaves in a different way in a magnetic discipline.
This mix will depend on a few adjustable settings, known as mixing angles. These are values that decide how a lot of every model of the electron is current within the combine, like mixing colours in several proportions. The scientists confirmed that by altering these angles, the g issue may additionally change. In a single instance they examined, the g issue shifts primarily based on a easy mathematical hyperlink between these angles and how briskly the electron is shifting in comparison with its mass. “Our outcomes shed new gentle on the issue of the anomalous magnetic moments of leptons,” Professor Chen famous. Leptons are a household of particles that features electrons, muons, and tau particles.
Importantly, this course of of blending doesn’t create any new particles. It merely adjustments the best way the present electron is described utilizing mathematical instruments. “Dirac’s braidon will not be a brand new particle. Particularly, Dirac’s braidon continues to be an electron, however a unitary-transformed ‘electron,’” Professor Chen defined. A unitary transformation is a mathematical methodology that adjustments how one thing is represented with out altering its core bodily properties. In different phrases, the braidon is simply one other strategy to signify the identical electron, not a distinct sort of matter.
This methodology is also utilized to different heavier particles which might be just like electrons, comparable to muons and tau particles. These particles are extra affected by adjustments within the g issue due to their higher weight. Through the use of the identical equations, scientists may determine what sort of mixing would possibly clarify the variations seen in experiments. This provides physicists a brand new software to know unusual outcomes.
Regardless that this concept continues to be theoretical—which means it has not but been confirmed by experiments—it provides an thrilling chance for real-world testing. Scientists may search for indicators that the g issue adjustments in new methods, not due to outdoors forces or new particles, however due to how the electron is blended with its different variations. If this proves true, it may assist make clear the outcomes of previous experiments and provide higher steerage for future ones. Professor Chen counsel extra work is required to know the deeper symmetry guidelines—primary patterns that assist clarify bodily legal guidelines—behind this mixing. For now, Professor Chen believes this concept “paves an attractive means for physicists to seek out ‘new physics,’” even utilizing well-established concepts.
Journal Reference
Chen J.-L., Fan X.-Y., Xie X.-R. “A doable mechanism to change gyromagnetic issue.” Leads to Physics, 2025; 69: 108125. DOI: https://doi.org/10.1016/j.rinp.2025.108125
Concerning the Writer
Jing-Ling Chen is a professor of physics at Nankai College. He bought his bachelor’s diploma (1994), grasp’s diploma (1997) and physician’s diploma (2000) in Nankai College, P. R. China. He has been a post-doc at Beijing institute of apply physics (2000-2002) and a analysis fellow at Nationwide College of Singapore (2002-2005), respectively. His analysis curiosity is quantum physics and quantum info, particularly in quantum elementary issues, comparable to EPR paradox, quantum entanglement, EPR steering, Bell’s nonlocality and quantum contextuality. Because of his contribution in quantum foundations, he has gained the Paul Ehrenfest Greatest Paper Award for Quantum Foundations (2021). Lately, he has made some authentic explorations on spin, comparable to proposing the spin vector potential, presenting the spin-type Aharonov-Bohm impact, and predicting the spin angular-momentum wave.
