So here is my question. Have a 2-D electron gas where:
E = P(x)^2/(2m) + P(y)^2/(2m)
Where p^2= p(y)^2 + p(x)^2
1. How many single particle energy states are there with momentum p?
( this may be a really simple question but I need a refresher.)
2. If there are N electrons is...