William D. Phillips (1997 Nobel Laureate in Physics), National Institute of Standards and Technology & University of Maryland
Scientists must rely on a system of units to provide a quantitative description of our universe. The International System of Units (the SI, or Metric system) starts with seven base units from which all measurable properties of objects and phenomena can be expressed. The universal and international character of science strives for the standards that define the units-necessary for the effective scientific communication that underpins the longstanding and continued success of science-to be unambiguous, precise, constant and accessible to everyone.
On May 20, 2019, World Metrology Day, the international metrology community adopted revolutionary changes to the SI wherein all of the base units of measure are defined by fixing the values of constants of nature. The SI is now firmly based on quantum methods of measurement. The talk will explain why we needed such reform and how we achieved it.
Негізгі бет A new Measure: the Revolutionary Quantum Reform of the Metric System, William D. Phillips
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