Entanglement and New Quantum Phenomena in Semiconductor Nanostructures

半导体纳米结构中的纠缠和新量子现象

• 批准号: 2723510
• 金额: --
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2723510
• 关键词: Entanglement; New; Quantum; Phenomena; Semiconductor

The project will develop and extend our recent experimental discovery that electron-electron repulsion canbreak a single row of confined carriers into two or more separate rows, this is the start of a Wigner Lattice inwhich the mutual repulsion of the electrons determines how they organise in space. The separate lines of thezig-zag are entangled and give rise a new fractional conductance, which comprises novel, highly interacting,fractional state. This phenomenon is the long sought non-magnetic equivalent of the Fractional Quantum HallEffect. Theory has established that the fractions arise due to the entanglement of two rows of electrons whichcan be manipulated by varying their mutual separation.The new fractions will be studied as a function ofelectric and magnetic fields which alter the wavefunctions, in particular the formation of the fractional state inquantum dots of differing geometries will be explored and a read-out mechanism established.Electron focussing in which a current is injected into a 2D region and then focused by a magnetic field allowsan imaging of the ground state wave function which changes as electrons strongly interact. We have recentlyshown that this method allows observation of the transtion from single to double rows and it will be a valuablediagnostic tool for the formation of the Wigner lattice. The technique can also be used to determine the spinpolarisation of the separate rows of the lattice.The physics of the process will be explored and a Quantum Computation scheme developed based around theentanglement of the electrons as the Wigner Lattice forms. The experiments will use the group's very lowtemperature facilities and will involve device fabrication in the LCN Clean Room and collaboration with theoristsin the UK and abroad.

该项目将发展和扩展我们最近的实验发现，电子-电子斥力可以将单排受限制的载流子分解成两行或更多行，这是维格纳晶格的开始，其中电子的相互斥力决定了它们在空间中的组织方式。这种锯齿状的分离线相互纠缠，产生了一种新的分数电导，它包含了一种新颖的、高度相互作用的分数态。这种现象是长期寻找的分数量子霍尔效应的非磁性等效物。理论已经证实，分数的产生是由于两排电子的纠缠，这可以通过改变它们的相互分离来操纵。新的分数将作为改变波函数的电场和磁场的函数来研究，特别是将探索不同几何形状的分数态量子点的形成并建立读出机制。在电子聚焦中，电流被注入二维区域，然后被磁场聚焦，这样就可以对基态波函数进行成像，基态波函数在电子强烈相互作用时发生变化。我们最近表明，这种方法允许观察从单行到双行的转变，它将是一个有价值的诊断工具，为维格纳晶格的形成。这项技术也可以用来确定晶格中不同行的自旋极化。该过程的物理将被探索和量子计算方案开发基于电子纠缠作为维格纳晶格的形式。实验将使用该小组的低温设备，包括在LCN洁净室制造设备，并与英国和国外的理论家合作。