A trio of researchers from Germany, Bulgaria and Russia has proposed the idea of using a molecular clock to determine if the electron-proton mass ratio changes over time. In their paper published in Physical Review Letters, Stephan Schiller, Dimitre Bakalov, and Vladimir Korobov describe a theoretical method for building such a clock and why if one were built, it might lead to new physics.
Everyone knows that atomic clocks are the gold standard for timing accuracy—they work by measuring the frequency of radiation as electrons from a single atom move from one energy level to another. In their paper, the researchers suggest that amolecular clock could be constructed by using a molecule with just two atoms and simultaneously combining multiple frequencies. They suggest such an approach could provide a more accurate assessment of whether the electron-proton mass ratio changes over time.
Read more at: Phys.org