String Theory & Poincaré Invariance: Why & What?

[moriheru]

My question concerns poincare invariance (I have left out the accent) in bosonic string theory. As far as I know, action of a 1-d String is described by poincare invariance. So my question is: why poincare invariance? And here comes the more ambarassing question: What is poincare invariance(deriviations are more than welcome)? I am referring to Polchinskis first volume of two ,named "Introduction to bosonic string theory". The page is given below...Thanks for any help!

 

[Vanadium 50]

Why is this urgent?

 

[moriheru]

Why is this urgent?

Don't know just for fun. Thought it might accelerate messages :) .
Thanks for your valueable input.

 

[haushofer]

You should first understand special relativity before jumping to ST. See e.g. any book om QFT, like Peskin&Schroeder. Or try Zwiebach.

 

[moriheru]

You should first understand special relativity before jumping to ST. See e.g. any book om QFT, like Peskin&Schroeder. Or try Zwiebach.

I have only studied Universitys QM in depth esle I do mathematics. So is poincare invariance part of special relativity does Zwiebach cover metrics?

 

[haushofer]

Yes and yes. I think Zwiebach is the book you want :)

 

[moriheru]

Thankyou haushofer.