(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

One thing that has been bothering me about the light-cone gauge that Zwiebach uses is that we have equations such as 9.63 and 9.71 in which X^+ and X^- are given by completely different expressions.

I am not sure why this makes sense physically since we can interchange X^+ and X^- just by moving to coordinate system in which X^1' = -X^1. So, shouldn't it be arbitrary which coordinate is X^+ and X^- and if it is arbitrary and coordinate-system dependent, how can physics depend on which way we choose our coordinate system?

2. Relevant equations

3. The attempt at a solution

**Physics Forums - The Fusion of Science and Community**

# Zwiebach string theory quesiton

Know someone interested in this topic? Share a link to this question via email,
Google+,
Twitter, or
Facebook

Have something to add?

- Similar discussions for: Zwiebach string theory quesiton

Loading...

**Physics Forums - The Fusion of Science and Community**