ELFT HÍRADÓ

[Balazs Dora <dora AT kapica.phy.bme.hu>]

  Masaaki Nakamura (Tokyo Institute of Technology) eloadast tart

"Exact results for a fermion chain with fractionalized excitations"

cimmel a BME Fizika Tanszeken (F epulet, 2. emelet, 13-as terem) marcius 
14-en delutan 3 orakor.

Abstract:
We present a number of exact results for a fermion chain with center of
mass conservation at 1/3 filling. The ground state of our model, which
is three-fold degenerate even in the case of site dependent interactions, 
show striking similarities with the superconducting BCS wave functions, 
the AKLT spin chain, and in particular, with the Laughlin state describing 
the fractional quantum Hall effect. This state supports exact zero modes 
with fractional charge slightly below 1/3 filling, and it has a matrix 
product representation which enables us to analytically calculate 
correlation functions, excitation gaps, and the entanglement spectrum. We 
further extend the present argument to general 1/q filling systems.

M. Nakamura, Z.-Y. Wang and E. J. Bergholtz, arXiv:1110.5033



Minden erdeklodot szivesen latunk!

Dora Balazs