Timekeeping Theory Combines Quantum Clocks and Einstein's Relativity
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Timekeeping theory combines quantum clocks and Einstein's relativity:
A phenomenon of quantum mechanics known as superposition can impact timekeeping in high-precision clocks, according to a theoretical study from Dartmouth College, Saint Anselm College and Santa Clara University.
Research describing the effect shows that superposition-the ability of an atom to exist in more than one state at the same time-leads to a correction in atomic clocks known as "quantum time dilation."
The research, published in the journal Nature Communications, takes into account quantum effects beyond Albert Einstein's theory of relativity to make a new prediction about the nature of time.
"Whenever we have developed better clocks, we've learned something new about the world," said Alexander Smith, an assistant professor of physics at Saint Anselm College and adjunct assistant professor at Dartmouth College, who led the research as a junior fellow in Dartmouth's Society of Fellows. "Quantum time dilation is a consequence of both quantum mechanics and Einstein's relativity, and thus offers a new possibility to test fundamental physics at their intersection."
Journal Reference:
Alexander R. H. Smith, Mehdi Ahmadi. Quantum clocks observe classical and quantum time dilation [open], Nature Communications (DOI: 10.1038/s41467-020-18264-4)
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