Wg. Yin et al., DYNAMICS OF A SINGLE HOLE IN A QUANTUM ANTIFERROMAGNET - SELF-CONSISTENT BORN APPROXIMATION STUDY, Physics letters. A, 220(4-5), 1996, pp. 281-286
We present a representation where holes are described as spinless ferm
ions and the spin system as interacting bosons undergoing Bose-Einstei
n condensation to study the dynamics of a single hole in a two-dimensi
onal quantum antiferromagnet within the self-consistent Born approxima
tion. The advantage of this approach is that one can uniformly handle
the t-J model and the t-t'-J model.