Articles in peer-reviewed journals
|Surface and bulk critical behaviour of the XY chain in a transverse field|
|Journal of Physics A: Mathematical and General 33 (2000)|
|ArXiv : cond-mat/0009038 [PDF]|
The surface magnetization of the quantum XY chain in a transverse field is found for arbitrary nearest-neighbour interactions in closed form. This allows us to derive the bulk phase diagram in a simple way. The magnetic surface behaviour and the bulk correlation length are found exactly.