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Time dilation effects on Earth surface: Optical lattice clocks measurements.
- Source :
-
Physical Review D: Particles, Fields, Gravitation & Cosmology . 10/15/2020, Vol. 102 Issue 8, p1-1. 1p. - Publication Year :
- 2020
-
Abstract
- Recently, Takamoto et al. (2020) have discussed high precision measurements of gravity induced time dilation effects on optical lattice clocks located near the Earth surface. A relative tick frequency change, δν/ν0=(49 337.8±4.3)10-18, is found between two optical lattice clocks, one located at the ground floor, h=0 m, and the second one at an altitude hexp=452.596 m, on the Skytree tower in Tokyo. The results are compared with the predictions of Einstein's equivalence principle (EEP) estimated as an average over gravimeter measurements at h=0 m and h=450 m. We present a different derivation of the EEP prediction based on the calculation of the effective gravitational potential on the ground floor and at h=hexp, in excellent agreement with the value δν/ν0, providing an independent method to validate the differences in time dilation measured experimentally. In addition, we obtain the next-order correction to the present results, which may be tested in future more accurate experiments. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 24700010
- Volume :
- 102
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Physical Review D: Particles, Fields, Gravitation & Cosmology
- Publication Type :
- Periodical
- Accession number :
- 147010040
- Full Text :
- https://doi.org/10.1103/PhysRevD.102.084064