gondolom, mindenkinek egyértelmű, hogy van Elburg kritikája nem azt vitatja, hogy pont azt a közismert tényt hagyták volna ki, ami a GPS alapja.

 

az órák eltérő járásával kapcsolatban a Nature cikke kifejti, hogy a két mérőállomás gravitációja eltér, az általános relativitáselmélet alapján ebből adódó időeltolódást pedig nem vették figyelembe az órák szinkronizálásánál.

 

Faster-than-light neutrinos face time trial

Did gravity mess with the clocks that measured particles breaking cosmic speed limit?

http://www.nature.com/news/2011/111005/full/news.2011.575.html

 

"Less than two weeks after the revelation that ghostly particles called neutrinos had been spotted travelling faster than the speed of light, physicists are saying they have found flaws in the analysis that would stop the claim in its tracks."

 

az eredeti publikáció:

 

The OPERA neutrino velocity result and the synchronisation of clocks

http://xxx.lanl.gov/abs/1109.6160

"The CERN-OPERA experiment claims to have measured a one-way speed of neutrinos that is apparently faster than the speed of light c. One-way speed measurements such as these inevitably require a convention for the synchronisation of clocks in non-inertial frames since the Earth is rotating. We argue that the effect of the synchronisation convention is not properly taken into account in the OPERA analysis and may well invalidate their interpretation of superluminal neutrino velocity."

 

ebben az írásban részletesen is kifejtik Contaldi észrevételeit, illetve azokat a korrekciókat, melyeket figyelembe kell venni a mérés értékelésénél:

 

Can general relativity explain the OPERA neutrino result?

Imperial College physicist looks at gravitational time effects

http://www.theregister.co.uk/2011/10/06/opera_and_general_relativity/

 

"Since GPS clocks are only managed to 100 nanosecond accuracy, the CERN experiment needed to devise some way to increase the accuracy threshold. “the OPERA experiment employed a travelling Time-Transfer Device (TTD) to calibrate the difference in time signals at each receiver. We assume this device to be a transportable atomic clock of sufficient accuracy [15]. The TTD constitutes a classic moving clock synchronisation conundrum in relativity,” the letter states.

He notes that the experimental setup introduces three relativistic time distortions that need to be corrected in analyzing the apparent time-of-flight of the neutrinos: time dilation resulting from “moving the TTD through a non-uniform gravitational potential”; a “Doppler-type effect” resulting from the TTD’s velocity with respect to Earth’s “rotating frame of reference”; and finally, errors due to “the rotation of the Earth as the TTD travels to its destination”."