Speaker
Prof.
Thomas Ihn
(ETH Zürich)
Description
A resonant exchange qubit utilizes two orthogonal (S = 1/2, Sz = 1/2) states composed of three electron spins as the qubit states. We realize such a qubit in a GaAs triple quantum dot with each quantum dot hosting a single electron. We couple the electron spins strongly to individual GHz-photons in a strip-line resonator via a tunable electric dipole coupling. Under optimum conditions, the qubit is found to have a decoherence rate of less than 10 MHz at a qubit-resonator coupling strength of 23 MHz. In a further experiment, we use resonator photons to couple the resonant exchange qubit coherently to a superconducting transmon qubit.
Authors
Prof.
Thomas Ihn
(ETH Zürich)
Mr
Andreas Landig
(ETH Zürich)
Dr
Jonne Koski
(ETH Zürich)
Dr
Pasquale Scarlino
(ETH Zürich)
Udson Mendes
(Univ. de Sherbrooke, Canadian Inst. for Adv. Research)
Alexandre Blais
(Univ. de Sherbrooke, Canadian Inst. for Adv. Research)
Dr
Christian Reichl
(ETH Zürich)
Prof.
Werner Wegscheider
(ETH Zürich)
Prof.
Andreas Wallraff
(Department of Physics, ETH Zürich)
Prof.
Klaus Ensslin
(ETH Zürich)
