Manipulation of Majorana-Kramers qubit and its tolerance in time-reversal invariant topological superconductor
Manipulation of Majorana-Kramers qubit and its tolerance in time-reversal invariant topological superconductor
复制标题
马约拉纳-克莱默量子位的操纵及其在时间反转不变拓扑超导体中的耐受性
DOI:
10.1103/physrevb.106.014522
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发表时间:
2022
影响因子:
3.7
通讯作者:
S. Fujimoto
中科院分区:
文献类型:
--
作者:
Y. Tanaka;T. Sanno;T. Mizushima;S. Fujimoto
We investigate non-Abelian statistics of Majorana-Kramers pairs (MKPs) in a network system of one-dimensional time-reversal invariant topological superconductors by using numerical simulations of braiding dynamics and examine the tolerance against various perturbations which may cause decoherence of MKPs. We, first, consider effects of a magnetic field which breaks time-reversal symmetry. In contrast to a naive expectation, the non-Abelian braiding of MKPs is robust against applied magnetic fields provided that the initial and final states of a braiding process are invariant under the combination of a time reversal and a mirror reflection, even when intermediate states break the combined symmetry. Second, we investigate the stability of non-Abelian braidings in the case with gate-induced inhomogeneous potentials at junctions between superconducting nanowires, which generally generate a non-Majorana nearly zero-energy Andreeev bound state at the junctions. It is found that the non-Majorana nearly zero-energy states interfere with MKPs, resulting in the failure of non-Abelian braidings, when the length scale of the inhomogeneous potentials is comparable to the coherence length of the superconductors.
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影响因子:
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作者:
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通讯作者:
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影响因子:
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通讯作者:
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DOI:
--
发表时间:
2022
期刊:
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影响因子:
8.6
作者:
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通讯作者:
Fujimoto, Satoshi
DOI:
--
发表时间:
2020
期刊:
影响因子:
--
作者:
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通讯作者:
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