在介电性近零元材料中的远程量子纠

科学领域:

• 量子信息科学
• 超材料
• 量子光学

背景情况:

• 量子纠对于量子信息处理至关重要,但受到空间脱和散射的限制.
• 现有的解决方案通常依赖于等离子波导,这些波导存在固有的损失.
• 长距离纠对于开发可扩展的芯片量子技术至关重要.

研究的目的:

• 为实现远程量子纠提出并演示一种全新的电介质平台.
• 通过使用接近零的epsilon (ENZ) 和接近零的mu (MNZ) 超材料来克服损失性等离子系统的局限性.
• 增强芯片内量子信息处理的纠范围和稳定性,特别是与空 (NV) 钻石中心兼容.

主要方法:

• 采用了一种完全介电平台,其中包含近于零 (MNZ) 的超材料.
• 通过在芯片上集成的空 (NV) 钻石中心研究纠性质.
• 评估过渡和稳定状态并发和零时间延迟的第二阶段相关函数 ($g12 ( 2 ) ( ).主要成果:在超过17个自由空间波长 (约12.5μm) 的距离上实现了纠.与之前的作品相比,在纠竞争中表现出一个数量级的增强.在二次相关函数中观察到一个反捆绑签名, 表明高质量的纠.结论:拟议的介电MNZ平台为远程量子纠提供了重大进步.这项技术与NV钻石中心等芯片内量子系统兼容,为实际的量子信息处理铺平了道路.增强的纠范围和质量代表了克服脱和消散挑战的突破.更多相关视频05:39Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas PlatformPublished on: August 2, 20199.7K09:33Demonstration of Equal-Intensity Beam Generation by Dielectric MetasurfacesPublished on: June 7, 20196.4KSee all related videos相关概念视频01:30Electromagnetic Waves in Matter3.3KElectromagnetic waves can travel in the vacuum as well as in matter. For example light, which is an electromagnetic wave, can travel through air, water, or glass.Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the...3.3K01:26Diamagnetism2.5KMaterials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....2.5K01:30Paramagnetism2.6KParamagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...2.6K01:27Electrostatic Boundary Conditions in Dielectrics1.4KWhen an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...1.4K01:29Potential Due to a Polarized Object470A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...47001:26Susceptibility, Permittivity and Dielectric Constant1.8KWhen placed in an external electric field, a dielectric material gets polarized. The charge density in the dielectric material is given by the sum of the bound and free charge densities, while the total charge density can also be written in terms of the total electric field. The bound charge density can be measured in terms of polarization, leading to the relationship between electric displacement and polarization.1.8K$