量子-达尔文主义-编码转换的可解决模型
1Université Paris-Saclay, CNRS, LPTMS, 91405 Orsay, France.
Physical review letters
|April 2, 2024
概括
我们介绍了一个可解决的量子达尔文主义模型,展示了量子信息传播中的过渡. 该模型显示了信息检索的不同阶段,这对理解量子信息动态和测量诱导的阶段过渡有意义.
科学领域:
- 量子信息科学 量子信息科学
- 多体量子系统是多体的.
- 量子动力学 量子动力学是什么?
背景情况:
- 在单元动力学下,在多体系统中传播的量子信息是复杂的.
- 了解信息编码中的转换对于量子技术至关重要.
- 量子达尔文主义为新兴的古典客观性提供了一个框架.
研究的目的:
- 提出和分析量子达尔文主义的可解决模型.
- 研究量子信息传播中的突然变化 (过渡).
- 探索量子达尔文主义与测量诱导相变 (MIPT) 之间的关系.
主要方法:
- 使用一个随机的克利福德电路在一个不断扩大的树结构.
- 纠了一个输入量子位与一个参考量子位来跟踪信息.
- 采用了两次复制计算来与准确结果进行比较.
主要成果:
- 确定了一个量子达尔文主义阶段,信息可以从一小部分量子比特中获取.
- 确定了一个编码阶段,在该阶段无法检索此类信息.
- 观察到两个连续的过渡分离这些阶段,中间有一个混合阶段.
结论:
- 拟议的模型为研究量子信息编码过渡提供了一个可处理的框架.
- 来自复制计算的"化"相图是稳健的,适用于哈尔随机单元.
- 只有在经过修改的窃听模型中,在完全环境访问的情况下才能观察到尖的MIPT.
相关概念视频
The Quantum-Mechanical Model of an Atom
42.3K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
42.3K
Entropy Change in Reversible Processes
2.5K
In the Carnot engine, which achieves the maximum efficiency between two reservoirs of fixed temperatures, the total change in entropy is zero. The observation can be generalized by considering any reversible cyclic process consisting of many Carnot cycles. Thus, it can be stated that the total entropy change of any ideal reversible cycle is zero.
The statement can be further generalized to prove that entropy is a state function. Take a cyclic process between any two points on a p-V diagram.
The statement can be further generalized to prove that entropy is a state function. Take a cyclic process between any two points on a p-V diagram.
2.5K
Free Energy Changes for Nonstandard States
11.4K
The free energy change for a process taking place with reactants and products present under nonstandard conditions (pressures other than 1 bar; concentrations other than 1 M) is related to the standard free energy change according to this equation:
where R is the gas constant (8.314 J/K·mol), T is the absolute temperature in kelvin, and Q is the reaction quotient. This equation may be used to predict the spontaneity of a process under any given set of conditions.
Reaction Quotient...
where R is the gas constant (8.314 J/K·mol), T is the absolute temperature in kelvin, and Q is the reaction quotient. This equation may be used to predict the spontaneity of a process under any given set of conditions.
Reaction Quotient...
11.4K
Entropy and the Second Law of Thermodynamics
2.8K
The second law of thermodynamics can be stated quantitatively using the concept of entropy. Entropy is the measure of disorder of the system.
The relation between entropy and disorder can be illustrated with the example of the phase change of ice to water. In ice, the molecules are located at specific sites giving a solid state, whereas, in a liquid form, these molecules are much freer to move. The molecular arrangement has therefore become more randomized. Although the change in average...
The relation between entropy and disorder can be illustrated with the example of the phase change of ice to water. In ice, the molecules are located at specific sites giving a solid state, whereas, in a liquid form, these molecules are much freer to move. The molecular arrangement has therefore become more randomized. Although the change in average...
2.8K
Transmission-Line Differential Equations
286
Transmission lines are essential components of electrical power systems. They are characterized by the distributed nature of resistance (R), inductance (L), and capacitance (C) per unit length. To analyze these lines, differential equations are employed to model the variations in voltage and current along the line.
Line Section Model
A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured...
Line Section Model
A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured...
286
First Law Of Thermodynamics: Problem-Solving
2.6K
The first law of thermodynamics states that the change in internal energy of the system is equal to the net heat transfer into the system minus the net work done by the system. This equation is a generalized form of energy conservation and can be applied to any thermodynamic process.
The following strategies can be used to solve any problem involving the first law of thermodynamics.
The following strategies can be used to solve any problem involving the first law of thermodynamics.
2.6K


