Spontaneous Modulation of Superconducting Phase in Kitaev Ladder

被引：1

作者：

Nakosai, Sho ^{[1
,2
]}

Tanaka, Yukio ^{[2
]}

Ng, Tai Kai ^{[3
,4
]}

Nagaosa, Naoto ^{[5
,6
]}

机构：

[1] RIKEN, Condensed Matter Theory Lab, Wako, Saitama 3510198, Japan

[2] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4640861, Japan

[3] Hong Kong Univ Sci & Technol, Dept Phys, Clear Water Bay, Hong Kong, Peoples R China

[4] Hong Kong Acad Gifted Educ, Shatin, Hong Kong, Peoples R China

[5] RIKEN Ctr Emergent Matter Sci CEMS, Wako, Saitama 3510198, Japan

[6] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138654, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2018年 / 87卷 / 08期

关键词：

D-WAVE SUPERCONDUCTORS; MAJORANA FERMIONS; QUANTUM COMPUTATION; NANOWIRE; PARTICLES; SIGNATURE; DEVICES; ANYONS; STATES; EDGE;

D O I：

10.7566/JPSJ.87.083702

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study theoretically two Kitaev chains placed in parallel, i.e., Kitaev ladder, connected through Josephson coupling. The pi-junction between the Majorana bound states at the ends of the chains competes with the usual Josephson coupling along the chain, and this frustration leads to modulation of the phase difference of the superconducting order parameter in the two chains. We show that this modulation results in double degeneracy of the ground states, which can be manipulated by external electric and magnetic fields.

引用

页数：5

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