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Edit suggestions

+ 2 like - 0 dislike
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asked Feb 20, 2015 in Public Official Posts by dimension10 (1,950 points) [ revision history ]
edited Mar 23, 2015 by dimension10

3 Answers

+ 2 like - 0 dislike

[APPROVED by Dilaton]

Title clean up at http://physicsoverflow.org/33418/linear-involution-construct-adhm-data-hyper-ahler-quotient

inti- --> anti-

K/"ahler --> Kähler

Just cut and paste the following:

What is the anti-linear involution used to construct the ADHM data and the hyper-Kähler quotient?

Gotta feed those search engines

answered Sep 27, 2015 by Aabaakawad (40 points) [ revision history ]
edited Sep 27, 2015 by Dilaton
+ 1 like - 0 dislike

[APPROVED by Dilaton]

http://www.physicsoverflow.org/36903/trajectory-satelite-predicted-initial-velocity-position ought to read:

How can the trajectory of a satellite between the Moon and the Earth be predicted if the initial velocity and position are known?

How can this be solved if it is assumed that the satellite does not affect the motion of the Earth and the Moon?

answered Aug 20, 2016 by PeterMortensen (0 points) [ revision history ]
edited Aug 20, 2016 by Dilaton

Thanks, done.

+ 1 like - 0 dislike

[APPROVED by Dilaton]

Summary suggestion for the review of Ideal clocks - a convenient fiction

abstract : We show that no device built according to the rules of quantum field theory can measure proper time along its path. Highly accelerated quantum clocks experience the Unruh effect, which inevitably influences their time rate. This contradicts the concept of an ideal clock, whose rate should only depend on the instantaneous velocity.

The authors derive analytically from a simplest case of a uniform acceleration through the study of a decaying particle in a cavity that the time measured by a clock depends on its acceleration and even more for a general accelerated motion.

They conclude that "All known physical processes and consequently all devices must become sensitive to their accelerations at certain scales and therefore the rate of any physical clock must inevitably differ from the idealized formula" and suggest further (numerical) evaluations of the impact.

answered Oct 25, 2016 by igael (100 points) [ revision history ]
edited Oct 25, 2016 by Dilaton

@igael thanks for the nice summary; maybe you could also write a review for the paper if you have read it in some detail?

It would not have to be a full review like for a peer-reviewd journal that considers all details of the paper. On PhysicsOverflow reviews (answers to submissions) that discuss partial aspects of the work at hand are also highly welcome and appreciated.

@Dilaton: it is difficult because the authors come and go from classical relativities to QFT. Many assumptions have to be checked precisely, for example when they apply GR to the decay with a precise number of particles ( one ) and a very precise trajectory. For me, it is unclear how this may apply to quantum entities. Nevertheless, it is a very interesting document as much for the exercise ( (11) -> (25) ! ) and its fundamental contents. Notice that there is an older similar work on the effects on time of the "Casimir effect". Probably in a few weeks...

@igael yes, I think writing reviews is rather difficult and time-consuming, if one wants to do a reasonable job. So take your time ;-)

Of course there also seem to be exceptional people who seemingly produce them without any effort, such as Lubos for example who often writes about good and bad papers on his blog ...

Lubos, Ron, Arnold ? I don't try to compete at all. Reading them is a sufficient pleasure  :)

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