# Dynamic phase shift within a falling glass cube is negligible: comment on ‘Relativistic theory of the falling retroreflector gravimeter’

@article{Svitlov2018DynamicPS, title={Dynamic phase shift within a falling glass cube is negligible: comment on ‘Relativistic theory of the falling retroreflector gravimeter’}, author={Sergiy Svitlov}, journal={Metrologia}, year={2018}, volume={55}, pages={609 - 613} }

A recent paper (Ashby 2018 Metrologia 55 1) provides a rigorous relativistic treatment of the laser interferometer with a free-falling cube retroreflector. When considering the phase shift due to the light propagation within the glass cube, the associated effect was found to be 6.8 µGal. The constant phase shift was misinterpreted in the data analysis, producing a pseudo effect. We show that the time-dependent phase shift within the glass cube causes a negligible bias of the computed gravity…

## 6 Citations

Reply to ‘Dynamic phase shift within a falling glass cube is negligible: comment on ‘Relativistic theory of the falling cube gravimeter’’

- PhysicsMetrologia
- 2018

In the subject paper Ashby (2018 Metrologia 55 1–10) of the comment Svitlov (2018 Metrologia 55 609–13), light propagation through an absolute gravimeter was analyzed, including the propagation delay…

Reply to ‘Comment on Relativistic theory of the falling cube gravimeter’

- Physics
- 2018

The comment (Křen and Pálinkás 2017 Metrologia 55 314–5) claims that the paper Relativistic theory of the falling cube gravimeter (Ashby 2017 Metrologia 55 1–10) is incorrect. The authors of this…

Use of the relativistic phase-time equation in absolute ballistic gravimetry

- PhysicsMetrologia
- 2019

The signal recorded in absolute ballistic gravimeters and used to track the trajectory of the free-falling corner-cube was recently studied for the first time in full agreement with relativistic…

Comparison of Open and Solid Falling Retroreflector Gravimeters

- PhysicsMetrologia
- 2020

We study whether the optical properties of a solid glass retroreflector influence the value of the acceleration of gravity g determined by dropping both solid and open retroreflectors in an absolute…

Relativistic theory of the falling cube gravimeter ∗

- Physics
- 2018

In the subject paper [1] of the comment [2], light propagation through an absolute gravimeter was analyzed, including the propagation delay through the falling retroreflector and through the vacuum.…

On the effect of the light propagation within the corner-cube reflector of absolute gravimeters

- Physics
- 2018

We have assessed the implications of the in-cube light propagation effect in absolute gravimeters, and found it contradictory to existing theoretical and experimental data. We maintain that the…

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No correction for the light propagation within the cube: comment on ‘Relativistic theory of the falling retroreflector gravimeter’

- PhysicsMetrologia
- 2018

Although the equation of motion developed in the paper (Ashby 2018 Metrologia 55 1) depends on the parameters of the falling cube, such as the depth and refraction index, the parameters are only…

Comment on ‘Relativistic theory of the falling retroreflector gravimeter’

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In the paper by Ashby (2018 Metrologia 55 1–10) the correction due to the time delay of light propagated through the prism retroreflector of absolute gravimeters is discussed. Accordingly, the…

Reply to ‘Comment on Relativistic theory of the falling cube gravimeter’

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- 2018

The comment (Křen and Pálinkás 2017 Metrologia 55 314–5) claims that the paper Relativistic theory of the falling cube gravimeter (Ashby 2017 Metrologia 55 1–10) is incorrect. The authors of this…

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We develop a relativistic treatment of interference between light reflected from a falling cube retroreflector in the vertical arm of an interferometer, and light in a reference beam in the…

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