在门依赖噪声下,经典影子的稳定性
Raphael Brieger1,2, Markus Heinrich1, Ingo Roth3
1Heinrich Heine University Düsseldorf, Faculty of Mathematics and Natural Sciences, Düsseldorf, Germany.
Physical review letters
|March 25, 2025
概括
经典的影子通过克利福德电路提供了准确的量子状态估计,但"魔法"可观测物对噪声敏感. 强大的影子可以减轻一些错误,但可能会在特定的杂量子计算场景中引入偏差.
科学领域:
- 量子信息科学是一种量子信息科学.
- 量子计算是一种量子计算.
背景情况:
- 经典的影子通过随机测量来估计量子状态.
- 了解噪声对阴影估计的影响对于实际应用至关重要.
研究的目的:
- 在现实的噪音条件下分析经典影子协议的稳定性.
- 为了研究强大的影子在减轻噪音方面的性能.
主要方法:
- 用克利福德单元数对影子估计协议的理论分析.
- 对边界稳定器的噪声影响以及对边界稳定器标准和噪声影响的证明.
- 魔术 魔术 魔术 魔术 魔术 魔术 魔术
- 可以观察到的. 可观察到的.
- 识别影响阴影估计器的平均噪声通道.
主要成果:
- 基于克利福德的经典影子在受边界稳定器规范可观测的门依赖噪声下是稳定的.
- 估计的估计.
- 魔术 魔术 魔术 魔术 魔术 魔术 魔术
- 可观测的物质很容易发生校准错误,具有指数偏差.
- 强大的影子可以在门依赖噪声下引入偏差,但在更一般的噪声设置中,它们的功能得到了保证.
结论:
- 经典的影子协议对于在Clifford操作和门依赖噪声下的特定可观测值是强大的.
- 需要仔细考虑可观测的类型和噪声模型,才能对量子状态进行可靠的估计.
- 对噪声特征的进一步研究可以完善量子传感和计算精度.
相关概念视频
Stability of Equilibrium Configuration
415
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...
415
Stability of structures
149
In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...
149
Pole and System Stability
226
The transfer function is a fundamental concept representing the ratio of two polynomials. The numerator and denominator encapsulate the system's dynamics. The zeros and poles of this transfer function are critical in determining the system's behavior and stability.
Simple poles are unique roots of the denominator polynomial. Each simple pole corresponds to a distinct solution to the system's characteristic equation, typically resulting in exponential decay terms in the system's...
Simple poles are unique roots of the denominator polynomial. Each simple pole corresponds to a distinct solution to the system's characteristic equation, typically resulting in exponential decay terms in the system's...
226
Stability of Equilibrium Configuration: Problem Solving
558
The stability of equilibrium configurations is an important concept in physics, engineering, and other related fields. In simple terms, it refers to the tendency of an object or system to return to its equilibrium position after being disturbed. The stability of an equilibrium configuration can be analyzed by considering the potential energy function of the system and examining its behavior near the equilibrium point.
Problem-solving in the context of the stability of equilibrium configuration...
Problem-solving in the context of the stability of equilibrium configuration...
558
Stability
72
The time response of a linear time-invariant (LTI) system can be divided into transient and steady-state responses. The transient response represents the system's initial reaction to a change in input and diminishes to zero over time. In contrast, the steady-state response is the behavior that persists after the transient effects have faded.
The stability of an LTI system is determined by the roots of its characteristic equation, known as poles. A system is stable if it produces a bounded...
The stability of an LTI system is determined by the roots of its characteristic equation, known as poles. A system is stable if it produces a bounded...
72
BIBO stability of continuous and discrete -time systems
314
System stability is a fundamental concept in signal processing, often assessed using convolution. For a system to be considered bounded-input bounded-output (BIBO) stable, any bounded input signal must produce a bounded output signal. A bounded input signal is one where the modulus does not exceed a certain constant at any point in time.
To determine the BIBO stability, the convolution integral is utilized when a bounded continuous-time input is applied to a Linear Time-Invariant (LTI) system....
To determine the BIBO stability, the convolution integral is utilized when a bounded continuous-time input is applied to a Linear Time-Invariant (LTI) system....
314


