A Quantum Definition of the Kilogram

Finally, after 130 years of establishment, the new kilogram definition came into effect on 20th May 2019, coinciding with the World Metrology Day. The decision was arrived at unanimously during the 2019 General Conference on Weights and Measures (GCWM). Many people are still wondering what this means, and whether it was even necessary. As keen followers to the process, we take upon the responsibility in this essay to explicate the genesis of the problem, why it matters to all of us, and the mathematical physics behind the process. To ensure a consistent flow of information, let us first trace…