Hanbury-Brown-Twiss correlations and noise in the charge transfer
statistics through a multiterminal Kondo dot
Thomas Schmidt
Universitaet Freiburg
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We analyze the full counting statistics of charge transfer through a
quantum dot in the Kondo regime, when coupled to an arbitrary number of
terminals N. At the unitary Kondo fixed point and for N>2 we recover
distinct anticorrelations of currents in concurring transport channels,
which are related to the fermionic Hanbury Brown and Twiss (HBT)
antibunching. This effect weakens as one moves away from the fixed
point. Furthermore, we identify a special class of current correlations
that are due entirely to the virtual polarization of the Kondo singlet.
These can be used for extracting information on the parameters of the
underlying Fermi-liquid model.