论文标题

非本地旋转相关性是被困在基塔夫旋转液体空缺中的人的签名

Non-local spin correlation as a signature of Ising anyons trapped in vacancies of the Kitaev spin liquid

论文作者

Takahashi, Masahiro O., Yamada, Masahiko G., Udagawa, Masafumi, Mizushima, Takeshi, Fujimoto, Satoshi

论文摘要

在Kitaev手学旋转液体中,Ising Anyons被认为是$ Z_2 $ FLUXES BINDING MADIONA零模式,但是,这是具有有限衰减速率的热激发。另一方面,晶格空缺即使在基础状态下也将$ Z_2 $通量捕获,从而在空缺中稳定地实现了Majorana零模式。我们证明了两个空缺位点之间的自旋旋转相关函数表现出由Majorana零模式的分离特征引起的远距离相关性,尽管大量自旋相关的强烈衰减。值得注意的是,随着两个空缺位点之间的距离增加,信号主要传送时,这种非本地自旋相关性不会降低。此外,我们澄清说,可以通过测量两个空位位点之间的非局部电导率进行电气检测到非本地相关性,该空位位点可直接用于读取Majorana Qubits。这些发现为基于测量的量子计算铺平了道路,其中的伊森(Ising)被困在基塔耶(Kitaev)旋转液体的空缺中。

In the Kitaev chiral spin liquid, Ising anyons are realized as $Z_2$ fluxes binding Majorana zero modes, which, however, are thermal excitations with finite decay rates. On the other hand, a lattice vacancy traps a $Z_2$ flux even in the ground state, resulting in the stable realization of a Majorana zero mode in a vacancy. We demonstrate that spin-spin correlation functions between two vacancy sites exhibit long-range correlation arising from the fractionalized character of Majorana zero modes, in spite of the strong decay of bulk spin correlations. Remarkably, this non-local spin correlation does not decrease as the distance between two vacancy sites increases, signaling Majorana teleportation. Furthermore, we clarify that the non-local correlation can be detected electrically via the measurement of non-local conductance between two vacancy sites, which is straightforwardly utilized for the readout of Majorana qubits. These findings pave the way to the measurement-based quantum computation with Ising anyons trapped in vacancies of the Kitaev spin liquid.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源