相关实验视频
Updated: Jul 14, 2025

10:26
Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
11.4K
高阻抗共振器在脏的介电环境中的性能
J H Ungerer1,2, D Sarmah1, A Kononov1
1Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland.
概括
高阻抗共振器对于自旋量子比特量子计算至关重要. 这项研究表明,常见的介电材料不会限制共振器性能,从而使可扩展的量子处理器成为可能.
科学领域:
- 量子计算是一种量子计算.
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
背景情况:
- 高阻抗共振器是旋转量子比特之间的长距离纠门的关键.
- 在旋转量子比特制造中使用的门介电材料可以降低共振器质量.
研究的目的:
- 调查高阻抗化 (NbTiN) 共振器在二氧化 (SiO2) 和氧化 (Al2O3) 介电器附近的损失机制.
- 在高磁场和温度下对共振器性能进行基准测试.
- 为了评估这些介电结构对于基于旋转的量子处理器的兼容性.
主要方法:
- 高阻抗NbTiN共振器的制造.
- 热培养SiO2和原子层沉积 (ALD) Al2O3介电物的整合.
- 在高磁场和温度下对共振器的性能特征.
- 对共振器质量因素和损失机制的分析.
主要成果:
- 发声器的内部质量因子被发现在使用的氧化物中被限制在两级系统的合中.
- 尽管有局限性,但在所有研究的氧化物配置中,内部质量因子超过了10.
- 响应器性能并没有受到测试过的介电构造的显著限制.
结论:
- 研究的介电结构不会阻碍自旋量子比特设备的高阻抗共振器的性能.
- 结果促进了这些共振器直接集成到基于旋转的量子处理器中.
- 这项工作支持大规模,基于自旋的量子计算机的开发.
相关概念视频
Characteristics of Series Resonant Circuit
263
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
263
Series Resonance
188
The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
188
Capacitor With A Dielectric
4.0K
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
4.0K
Dielectric Polarization in a Capacitor
4.7K
The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
4.7K
Parallel Resonance
215
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
215
Concept of Resonance and its Characteristics
5.1K
If a driven oscillator needs to resonate at a specific frequency, then very light damping is required. An example of light damping includes playing piano strings and many other musical instruments. Conversely, to achieve small-amplitude oscillations as in a car's suspension system, heavy damping is required. Heavy damping reduces the amplitude, but the tradeoff is that the system responds at more frequencies. Speed bumps and gravel roads prove that even a car's suspension system is not...
5.1K

