Landau-Zener-Stückelberg Interferometry for Majorana Qubit.
Landau-Zener-Stückelberg Interferometry for Majorana Qubit.
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马约拉纳量子比特的朗道-齐纳-施塔克伯格干涉测量
DOI:
10.1038/s41598-018-26324-5
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发表时间:
2018-05-21
影响因子:
4.6
通讯作者:
Hu X
中科院分区:
文献类型:
--
作者:
Wang Z;Huang WC;Liang QF;Hu X
Stimulated by a recent experiment observing successfully two superconducting states with even- and odd-number of electrons in a nanowire topological superconductor as expected from the existence of two end Majorana quasiparticles (MQs) [Albrecht et al., Nature 531, 206 (2016)], we propose a way to manipulate Majorana qubit exploiting quantum tunneling effects. The prototype setup consists of two one-dimensional (1D) topological superconductors coupled by a tunneling junction which can be controlled by gate voltage. We show that the time evolution of superconducting phase difference at the junction under a voltage bias induces an oscillation in energy levels of the Majorana parity states, whereas the level-crossing is avoided by a small coupling energy of MQs in the individual 1D superconductors. This results in a Landau-Zener-Stückelberg (LZS) interference between the Majorana parity states. Adjusting pulses of bias voltage and gate voltage, one can construct a LZS interferometry which provides an arbitrary manipulation of the Majorana qubit.
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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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