Coherence length of velocity fields

[Apashanka]

I have came across a term "coherence length of velocity field $\lambda$ ",tried to search in the internet but doesn't find any result...will anyone please give a brief summary of this in this context..

 

[DrClaude]

You'll have to give more context and details. Where exactly did you read this?

 

[Apashanka]

You'll have to give more context and details. Where exactly did you read this?

Okay fine the paper is
https://arxiv.org/abs/1703.08809And the line where I have read this is in the 2nd paragraph

 

[Apashanka]

Can anyone please help..

 

[kimbyd]

It's very frustrating that they never define what they mean by coherence length.

Typically, coherence length is the distance for which structures in propagating waves can be maintained. That is, if you start a pulse with a specific shape, after the coherence length the pulse will become diffused, its structure lost.

In quantum mechanics, this might also have something to do with quantum decoherence. But in any event, it would have been nice if they would have explained what they meant by the term. In the mean time, a reasonable assumption that they're talking about the exact same thing as explained in this Wikipedia article:
https://en.wikipedia.org/wiki/Coherence_length

 

[Apashanka]

Okay fine the paper is
https://arxiv.org/abs/1703.08809And the line where I have read this is in the 2nd paragraph
View attachment 244377

Can anyone please help me out here...they actually mean coherence length of peculiar velocity field