1208.0729 (J. -R. Souquet et al.)

Finite frequency noise in a quantum point contact between helical edge
states    [PDF]

J. -R. Souquet, P. Simon

We propose and analyze the non-equilibrium finite frequency current-current correlations as a mean to characterize the helical nature of the edge states in a quantum spin hall geometry. We show that the finite frequency noise enables to unambiguously discriminate between the one-particle and the two-particles processes occurring in the helical liquid for both tunneling or weak-backscattering regimes.

View original: http://arxiv.org/abs/1208.0729