Polchinski 2.4.1 change of coordinates

  • Context: Graduate 
  • Thread starter Thread starter electroweak
  • Start date Start date
  • Tags Tags
    Change Coordinates
Click For Summary

Discussion Overview

The discussion revolves around deriving equation 2.4.1 from Polchinski's text and understanding the implications of expressing the stress tensor with new indices, specifically z and z-bar. The scope includes conceptual clarification and technical explanation related to theoretical physics.

Discussion Character

  • Conceptual clarification, Technical explanation

Main Points Raised

  • One participant seeks to understand how to derive equation 2.4.1 and questions the meaning of writing the stress tensor with the new indices z and z-bar.
  • Another participant clarifies that their inquiry is not related to a homework problem or class assignment.
  • A later reply indicates that the initial confusion was due to forgetting to lower indices, suggesting that the issue may not be as complex as initially thought.
  • Another participant reflects on having encountered a similar situation recently, implying a shared experience in grappling with the material.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus, as there is a mix of confusion, realization, and shared experiences without a definitive resolution to the initial question posed.

electroweak
Messages
43
Reaction score
1
I've been working through Polchinski on my own, and I have a really basic question. How would one derive equation 2.4.1? What does it even mean to write the stress tensor with the new indices z and z-bar? I thought this was obvious, but it isn't working out for me.
 
Physics news on Phys.org
clarification: this is not a homework problem, and it is not for a class.
 
got it. wow, forgot to lower indices. there is nothing deep here, as i had originally suspected.
 
Just did something analogous last week...dontcha just wish you would have waited??
 

Similar threads

  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 1 ·
Replies
1
Views
689
  • · Replies 50 ·
2
Replies
50
Views
5K
  • · Replies 12 ·
Replies
12
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 9 ·
Replies
9
Views
1K
  • · Replies 41 ·
2
Replies
41
Views
5K
  • · Replies 62 ·
3
Replies
62
Views
12K