Hello Sayandip,   It would be easier to create some 2D lattice and embed the 1D  wires as  stripes of unit thickness, all parallel and in the same direction (say x ),  with y-coordinate being 0,1,2  for the three leads. Then, create a three-site system at (0,0), (0,1), (0,2)  and attach leads to it.   The hoppings set up between these 3 sites will model your junction transmissions. Best wishes, Sergey

On 12/05/2021 21:57, Sayandip Dhara wrote:

Hello, I want to create a three-wire "(1D each wire) junction for calculating conductance. Can I use kwant.lattice.chain() to use three separate chains and then join them somehow? I also need to change the angle between these 3 wires. It would be really helpful if anyone can give me the idea to make such a graph (lattice ) in kwant. Thanks, Sayandip Dhara