@misc{zanten2019photon,
author = {Zanten, David M.T. van and Sabonis, Deividas and Suter, Judith and Vayrynen, Jukka and Karzig, Torsten and Pikulin, Dmitry and O'Farrell, Eoin and Razmadze, Davydas and Petersson, Karl and Krogstrup, Peter and Marcus, Charles},
title = {Photon Assisted Tunneling of Zero Modes in a Majorana Wire},
howpublished = {arXiv: Mesoscale and Nanoscale Physics},
year = {2019},
month = {February},
abstract = {Hybrid nanowires with proximity-induced superconductivity in the topological regime host Majorana zero modes (MZMs) at their ends, and networks of such structures can produce topologically protected qubits. In a double-island geometry where each segment hosts a pair of MZMs, inter-pair coupling mixes the charge parity of the islands and opens an energy gap between the even and odd charge states at the inter-island charge degeneracy. Here, we report on the spectroscopic measurement of such an energy gap in an InAs/Al double-island device by tracking the position of the microwave-induced quasiparticle (qp) transitions using a radio-frequency (rf) charge sensor. In zero magnetic field, photon assisted tunneling (PAT) of Cooper pairs gives rise to resonant lines in the 2e-2e periodic charge stability diagram. In the presence of a magnetic field aligned along the nanowire, resonance lines are observed parallel to the inter-island charge degeneracy of the 1e-1e periodic charge stability diagram, where the 1e periodicity results from a zero-energy sub-gap state that emerges in magnetic field. Resonant lines in the charge stability diagram indicate coherent photon assisted tunneling of single-electron states, changing the parity of the two islands. The dependence of resonant frequency on detuning indicates a sizable (GHz-scale) hybridization of zero modes across the junction separating islands.},
url = {http://approjects.co.za/?big=en-us/research/publication/photon-assisted-tunneling-of-zero-modes-in-a-majorana-wire/},
}