Topic
Time dilation
About: Time dilation is a research topic. Over the lifetime, 982 publications have been published within this topic receiving 9189 citations. The topic is also known as: spacetime dilation & space-time dilation.
Papers published on a yearly basis
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Papers
TL;DR: Using the precision of state-of-the-art optical clocks, Chou et al. have confirmed that relativistic effects can now be measured at speeds attained by 100 meters sprinters and gravitational effects due to just one meter height difference and can now also detect time dilation due to a change in height near Earth’s surface of less than 1 meter.
Abstract: Observers in relative motion or at different gravitational potentials measure disparate clock rates. These predictions of relativity have previously been observed with atomic clocks at high velocities and with large changes in elevation. We observed time dilation from relative speeds of less than 10 meters per second by comparing two optical atomic clocks connected by a 75-meter length of optical fiber. We can now also detect time dilation due to a change in height near Earth's surface of less than 1 meter. This technique may be extended to the field of geodesy, with applications in geophysics and hydrology as well as in space-based tests of fundamental physics.
861 citations
TL;DR: The conceptual basis, founded on special and general relativity, for navigation using GPS, and experimental tests of relativity obtained with a GPS receiver aboard the TOPEX/POSEIDON satellite will be discussed.
Abstract: The Global Positioning System (GPS) uses accurate, stable atomic clocks in satellites and on the ground to provide world-wide position and time determination. These clocks have gravitational and motional frequency shifts which are so large that, without carefully accounting for numerous relativistic effects, the system would not work. This paper discusses the conceptual basis, founded on special and general relativity, for navigation using GPS. Relativistic principles and effects which must be considered include the constancy of the speed of light, the equivalence principle, the Sagnac effect, time dilation, gravitational frequency shifts, and relativity of synchronization. Experimental tests of relativity obtained with a GPS receiver aboard the TOPEX/POSEIDON satellite will be discussed. Recently frequency jumps arising from satellite orbit adjustments have been identified as relativistic effects. These will be explained and some interesting applications of GPS will be discussed.
702 citations
TL;DR: Gravity and quantum mechanics are expected to meet at extreme energy scales, but time dilation could induce decoherence even at low energies affecting microscopic objects, a prospect that could be tested in future matter-wave experiments.
Abstract: Gravity and quantum mechanics are expected to meet at extreme energy scales, but time dilation could induce decoherence even at low energies affecting microscopic objects—a prospect that could be tested in future matter-wave experiments.
362 citations
TL;DR: In this paper, it is shown that the Sagnac effect is a consequence of the relativistic law of velocity composition and that it can also be explained adequately within the framework of general relativity.
Abstract: Different explanations for the Sagnac effect are discussed. It is shown that this effect is a consequence of the relativistic law of velocity composition and that it can also be explained adequately within the framework of general relativity. When certain restrictions on the rotational velocity are imposed, the Sagnac effect can be attributed to the difference in the time dilation (or phase change) of material particle wave functions in the scalar (or correspondingly vector) gravitational potential of the inertial forces in a rotating reference system for counterpropagating waves. It is also shown that all the nonrelativistic interpretations of the Sagnac effect, which are unfortunately sometimes found in scientific papers, monographs and textbooks, are wrong in principle, even though the results they yield are accurate up to relativistic corrections in some special cases.
273 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2026 | 4 |
| 2025 | 164 |
| 2024 | 46 |
| 2023 | 125 |
| 2022 | 143 |
| 2021 | 30 |