在非赫尔密斯系统中的生物正角动态量子相位过渡.
Yecheng Jing1, Jian-Jun Dong1, Yu-Yu Zhang1
1Department of Physics and Chongqing Key Laboratory for Strongly Coupled Physics, Chongqing University, Chongqing 401331, China.
Physical review letters
|June 15, 2024
概括
我们引入了一个新的框架,用于研究非赫米特系统的动态量子相位过渡,使用双直角基. 这种方法揭示了拓顺序参数的1/2变化,此前隐藏在自我正常基中.
科学领域:
- 量子物理学的量子物理学
- 凝聚物质理论 凝聚物质理论
- 非赫米特系统的非赫米特系统.
背景情况:
- 动态量子相位转换 (DQPTs) 对于理解非赫米特系统至关重要.
- 标准方法经常与复杂的固有值和负的洛什米德率作斗争.
- 生物对角基为分析这些系统提供了一个潜在的替代方案.
研究的目的:
- 开发一个全面的框架来研究非赫尔密斯系统中的DQPT.
- 引入一个自动正常化的双直角洛什米特回声.
- 在非赫米蒂安DQPT中揭示新的现象.
主要方法:
- 使用生物对角基来进行理论分析.
- 使用关联状态定义一个自动规范的双直角洛什米特回声.
- 将框架应用于非赫米蒂安式的苏-施里弗-希格尔模型.
主要成果:
- 在非赫米特系统中建立了生物正角DQPT的综合框架.
- 关联状态使自动规范化的双直角洛什米特回声,处理复杂的固有值和消除负率.
- 在生物直角基中观察到动态拓顺序参数的1/2变化,在自我正常基中不存在.
- 发现生物对角DQPT的周期性取决于子系统行为 (振荡与稳定状态).
结论:
- 拟议的双直角框架为研究非赫米特系统中的DQPT提供了可靠的方法.
- 这种方法揭示了隐藏的拓过渡,并为它们的周期性提供了新的见解.
- 这些发现为深入了解开放量子系统中的量子动力学铺平了道路.
相关概念视频
02:31Phase Transitions
19.1K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
19.1K
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
1.0K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.0K
01:10Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule
1.2K
In the AX proton spin system, proton A can sense the two spin states of a coupled proton X, resulting in a doublet NMR signal with two peaks of equal (1:1) intensity. When proton A is coupled to two equivalent protons (AX2 spin system), the spin states of each X can be aligned with or against the external field, creating three possible scenarios. This results in a 1:2:1 triplet signal, where the central peak corresponds to the chemical shift of A and is twice as large or intense as the...
1.2K
02:45The Quantum-Mechanical Model of an Atom
42.2K
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.
42.2K
01:21Path Between Thermodynamics States
3.1K
Consider the two thermodynamic processes involving an ideal gas that are represented by paths AC and ABC in Figure 1:
3.1K
02:32The de Broglie Wavelength
25.8K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
25.8K