Dear Joseph. Thank you for your reply. If I got it well, you mean the first site the hopping along x direction and second site the hopping in the y direction. Best A.BELAYADI
Le lun. 2 sept. 2019 à 09:15, Joseph Weston <joseph.westo...@gmail.com> a écrit : > Hello, > > > What is the difference between hop[0].tag and hop[1].tag > > hop[0].tag is the tag of the first site in the hopping and hop[1].tag is > the tag of the second site in the hopping. > > > > My second question > the onsite fuction for example: def onsite(site, V):return V > > why it depends on site where the shape functions for example > def circle(pos): rsq = pos[0] ** 2 + pos[1] ** 2 > depends on pos > > Because when creating a shape in realspace you typically only care about > the position, whereas your onsite matrix elements could potentially depend > on other things (e.g. the lattice that the site is from) > > > Happy Kwanting, > > > Joe >
