arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1601.07073cond-mat.mes-hall
收藏

X结几何中Majorana态的操纵

Manipulation of Majorana states in X-junction geometries

D. N. Aristov, D. B. Gutman

摘要:

我们研究了基于四个马约拉纳束缚态的X-结几何的量子操纵。这种结构的参数空间比以前研究的Y结的参数空间大,并且用SO(4)对称群描述。为了使量子计算不受退相的影响,两个马约拉纳态必须始终保持简并。我们找到了一个必要的条件,并计算贝里的阶段,$2α$,在操作过程中积累。我们构建了简单的协议的各种值的$α$,包括$π/8$量子计算的目的所需的。虽然在一般的X-结几何的操作没有拓扑保护,他们可能被证明是一个可行的妥协量子计算的目标。

英文摘要:

We study quantum manipulation based on four Majorana bound states in X-junction geometry. The parameter space of this setup is bigger than of the previously studied Y-junction and is described by SO(4) symmetry group. In order for quantum computation to be dephasing free, two Majorana states have to stay degenerate at all times. We find a condition necessary for that and compute the Berry's phase, $2α$, accumulated during the manipulation. We construct simple protocols for the variety of values of $α$, including $π/8$ needed for the purposes of quantum computation. Although the manipulations in general X-junction geometry are not topologically protected, they may prove to be a feasible compromise for aims of quantum computation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑