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2015 ; 5
(ä): 12233
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Robust interface between flying and topological qubits
#MMPMID26216201
Xue ZY
; Gong M
; Liu J
; Hu Y
; Zhu SL
; Wang ZD
Sci Rep
2015[Jul]; 5
(ä): 12233
PMID26216201
show ga
Hybrid architectures, consisting of conventional and topological qubits, have
recently attracted much attention due to their capability in consolidating
robustness of topological qubits and universality of conventional qubits.
However, these two kinds of qubits are normally constructed in significantly
different energy scales, and thus the energy mismatch is a major obstacle for
their coupling, which can support the exchange of quantum information between
them. Here we propose a microwave photonic quantum bus for a strong direct
coupling between the topological and conventional qubits, where the energy
mismatch is compensated by an external driving field. In the framework of
tight-binding simulation and perturbation approach, we show that the energy
splitting of Majorana fermions in a finite length nanowire, which we use to
define topological qubits, is still robust against local perturbations due to the
topology of the system. Therefore, the present scheme realizes a rather robust
interface between the flying and topological qubits. Finally, we demonstrate that
this quantum bus can also be used to generate multipartitie entangled states with
the topological qubits.