论文标题
通过磁场角依赖性鉴定基塔夫量子自旋液体
Identification of a Kitaev Quantum Spin Liquid by Magnetic Field Angle Dependence
论文作者
论文摘要
量子自旋液体从局部旋转中实现巨大的纠缠和分数准粒子，该旋转被认为是量子科学和技术的途径。特别是，在基塔夫量子旋转液体的非亚洲阶段提出了拓扑量子计算，该阶段具有majorana fermions，检测Majorana fermions是现代冷凝物质物理学中最杰出的问题之一。在这里，我们提出了一种通过磁场角依赖性来识别非亚伯kitaev量子旋转液体的具体方法。在磁场角的平面上存在拓扑保护的临界线，它们的形状由微观自旋相互作用确定。手性操作员在展示临界线的微观依赖方面起着关键作用。我们还表明，手性操作员可用于评估非亚伯kitaev量子自旋液体的拓扑特性，而无需依赖Majoraana fermion描述。为将来的实验提供了非亚伯旋转液态的实验标准。
Quantum spin liquids realize massive entanglement and fractional quasiparticles from localized spins, proposed as an avenue for quantum science and technology. In particular, topological quantum computations are suggested in the non-abelian phase of Kitaev quantum spin liquid with Majorana fermions, and detection of Majorana fermions is one of the most outstanding problems in modern condensed matter physics. Here, we propose a concrete way to identify the non-abelian Kitaev quantum spin liquid by magnetic field angle dependence. Topologically protected critical lines exist on a plane of magnetic field angles, and their shapes are determined by microscopic spin interactions. A chirality operator plays a key role in demonstrating microscopic dependences of the critical lines. We also show that the chirality operator can be used to evaluate topological properties of the non-abelian Kitaev quantum spin liquid without relying on Majorana fermion descriptions. Experimental criteria for the non-abelian spin liquid state are provided for future experiments.
