1206.0958 (A. Golub et al.)

Charge Resistance in a Majorana RC circuit    [PDF]

A. Golub, E. Grosfeld

We investigate the dynamical charge response in a system formed by a Majorana Coulomb box (realized by two Majorana fermions hosted at the ends of a short wire). The box is coupled by one side to the normal lead and low frequency gate voltage is applied to the system. There is no dc-current. The system may be considered as an RC quantum circuit. We calculate the effective capacitance and charge relaxation resistance. The latter is in agreement with Korringa-Shiba formula where, however, the charge relaxation resistance is equal to $h/2e^2$. This value corresponds to the strong Coulomb blockade limit suggested in Ref.7 for a topological superconducting wire.

View original: http://arxiv.org/abs/1206.0958