Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors

Camjayi Alberto; Arrachea Liliana; Aligia Armando; von Oppen Felix

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Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors

机译：在时间反转不变的拓扑超导体中分数旋转和约瑟夫森效应

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Time-reversal-invariant topological superconducting (TRITOPS) wires are known to host a fractional spin h/4 at their ends. We investigate how this fractional spin affects the Josephson current in a TRITOPS-quantum dot-TRITOPS Josephson junction, describing the wire in a model that can be tuned between a topological and a nontopological phase. We compute the equilibrium Josephson current of the full model by continuous-time Monte Carlo simulations and interpret the results within an effective low-energy theory. We show that in the topological phase, the 0-to-pi transition is quenched via formation of a spin singlet from the quantum-dot spin and the fractional spins associated with the two adjacent topological superconductors.

机译：已知时间反转不变的拓扑超导（氚）导线在其端部托管分数旋转H / 4。我们调查该分数旋转如何影响Josephse-Tritops Josephse Endion的Josephson电流，描述可以在拓扑和非本质阶段之间调整的模型中的电线。我们通过连续时间蒙特卡罗模拟计算全模型的均衡约瑟夫森电流，并将结果解释在有效的低能量理论中。我们表明，在拓扑阶段，通过从量子点旋转形成旋转单线件和与两个相邻拓扑超导体相关的分数旋淬，淬灭0-pi转变。

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《Physical review letters》 |2017年第8期|046801.1-046801.5|共5页
作者
Camjayi Alberto; Arrachea Liliana; Aligia Armando; von Oppen Felix;
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作者单位

Univ Buenos Aires Dept Fis FCEyN Pabellon 1 Ciudad Univ RA-1428 Caba Argentina|IFIBA Pabellon 1 Ciudad Univ RA-1428 Caba Argentina;

ECyT UNSAM Int Ctr Adv Studies Campus Miguelete 25 Mayo & Francia RA-1650 Buenos Aires DF Argentina;

CNEA Ctr Atom Bariloche RA-8400 San Carlos De Bariloche Argentina|CNEA Inst Balseiro RA-8400 San Carlos De Bariloche Argentina;

Free Univ Berlin Dahlem Ctr Complex Quantum Syst & Fachbereich Phy D-14195 Berlin Germany;

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1. Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors [J] . Camjayi Alberto, Arrachea Liliana, Aligia Armando, Physical review letters . 2017,第4期

机译：时变不变拓扑超导体中的分数自旋和约瑟夫森效应
2. Fragility of the Fractional Josephson Effect in Time-Reversal-Invariant Topological Superconductors [J] . Knapp Christina, Chew Aaron, Alicea Jason Physical review letters . 2020,第20期

机译：分数Josephson效应的脆弱性在时间逆转不变的拓扑超导体中
3. Entangled end states with fractionalized spin projection in a time-reversal-invariant topological superconducting wire [J] . Aligia Armando A., Arrachea Liliana Physical review. B, Condensed Matter And Materals Physics . 2018,第17期

机译：时间不变的拓扑超导线中具有分数自旋投影的纠缠端态
4. Phase-Coherent Control of Interface Magnetization and Spin-Charge Currents in Topological Superconducting Junctions: Interface Magnetization and Currents in Topological Junctions [C] . A. Romano, C. Noce, M. Cuoco, International Superconductive Electronics Conference . 2017

机译：拓扑超导结中界面磁化和自旋电荷电流的相干控制：拓扑结中界面磁化和电流
5. Amplitude control of spin-triplet supercurrent in superconductor/ferromagnet/superconductor Josephson junctions [D] . Martinez, William M. 2015

机译：超导体/铁磁体/超导体约瑟夫森结中自旋三重态超电流的振幅控制
6. Josephson effect in junctions of conventional and topological superconductors [O] . Alex Zazunov, Albert Iks, Miguel Alvarado, 2018

机译：常规和拓扑超导体的结中的约瑟夫森效应
7. Fractional spin and Josephson effect in time-reversal-invariant topological superconductors [O] . Camjayi, Alberto, Arrachea, Liliana, Aligia, Armando, 2017

机译：分数自旋和约瑟夫森效应在时间反转不变量拓扑超导体

Fractional Spin and Josephson Effect in Time-Reversal-Invariant Topological Superconductors

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