门组评估指标,用于密闭循环中对钻石中气空缺中心组合的最佳控制
Philipp J Vetter1,2, Thomas Reisser3,4, Maximilian G Hirsch1,2,5
1Institute for Quantum Optics, Ulm University, Ulm, Germany.
NPJ quantum information
|October 7, 2024
概括
这项研究比较了量子门性能指标,以实现最佳控制. 研究人员使用空缺中心提高了门的性能,改进了所有测试方法.
科学领域:
- 量子科学和技术是量子科学和技术.
- 量子信息处理是一种量子信息处理.
- 量子计算硬件 量子计算硬件
背景情况:
- 精确控制量子动力学对于量子操作 (量子门) 是至关重要的.
- 量子门容易产生特定应用程序的错误,影响控制策略.
- 对于面向应用的量子最佳控制,需要上下文门组性能测量.
研究的目的:
- 为了比较闭环量子最佳控制的不同措施的有效性.
- 确定量子过程断层扫描,门组断层扫描 (GST) 和随机基准测试 (RB) 之间的权衡.
- 通过最佳控制来证明增强门组性能.
主要方法:
- 用钻石中的空 (NV) 中心的宏观组合作为实验测试床.
- 探索和比较了量子过程断层扫描 (QPT),线性反转门组断层扫描 (LIGST),随机线性门组断层扫描 (RLIGST) 和随机基准测试 (RB).
- 应用闭环量子最佳控制策略,以这些性能指标为基础.
主要成果:
- 证明了QPT,LIGST,RLIGST和RB在最佳控制实验中的相对权衡和适用性.
- 显著提高了研究量子门组的性能.
- 在所有评估的门组性能指标中实现了可衡量的改进.
结论:
- 门性能测量的选择显著影响量子最佳控制的成功.
- 基于适当措施的优化控制策略可以使量子门的可靠性得到显著改善.
- 钻石中的NV中心为测试和推进量子控制技术提供了一个可行的平台.
更多相关视频
15:47Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
Published on: November 1, 2013
16.2K
08:42High-Sensitivity Nuclear Magnetic Resonance at Giga-Pascal Pressures: A New Tool for Probing Electronic and Chemical Properties of Condensed Matter under Extreme Conditions
Published on: October 10, 2014
11.6K
相关概念视频
01:16Potential-Energy Criterion for Equilibrium
525
Potential energy or potential function plays an essential role in determining the stability of a mechanical system. If a system is subjected to both gravitational and elastic forces, the potential function of the system can be expressed as the algebraic sum of gravitational and elastic potential energy. If the system is in equilibrium and is displaced by a small amount, then the work done on the system equals the negative of the change in the system's potential energy from the initial to...
525
02:33Lattice Centering and Coordination Number
9.5K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
Types of Unit Cells
Imagine taking a large number of identical...
9.5K
01:12Fermi Level Dynamics
227
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
227
01:17Open and closed-loop control systems
675
Control systems are foundational elements in automation and engineering. They are broadly categorized into open-loop and closed-loop systems. These classifications hinge on the presence or absence of feedback mechanisms, significantly influencing the system's performance, complexity, and application.
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal...
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal...
675
01:23Equilibrium Conditions for a Particle
1.1K
When an object is in equilibrium, it is either at rest or moving with a constant velocity. There are two types of equilibrium: static and dynamic. Static equilibrium occurs when an object is at rest, while dynamic equilibrium occurs when an object is moving with a constant velocity. In both cases, there must be a balance of forces acting on the object.
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
1.1K
01:23Stability of Equilibrium Configuration
434
Understanding the stability of equilibrium configurations is a fundamental part of mechanical engineering. In any system, there are three distinct types of equilibrium: stable, neutral, and unstable.
A stable equilibrium occurs when a system tends to return to its original position when given a small displacement, and the potential energy is at its minimum. An example of a stable equilibrium is when a cantilever beam is fixed at one end and a weight is attached to the other end. If the weight...
A stable equilibrium occurs when a system tends to return to its original position when given a small displacement, and the potential energy is at its minimum. An example of a stable equilibrium is when a cantilever beam is fixed at one end and a weight is attached to the other end. If the weight...
434