相关实验视频
Updated: Jul 19, 2025

10:00
Gradient Echo Quantum Memory in Warm Atomic Vapor
Published on: November 11, 2013
12.9K
通过绕过长寿命连贯性来超加速量子热化动态:一种分析处理
Felix Ivander1, Nicholas Anto-Sztrikacs2, Dvira Segal1,2
1Chemical Physics Theory Group, Department of Chemistry and Centre for Quantum Information and Quantum Control, University of Toronto, 80 Saint George Street, Toronto, Ontario, Canada M5S 3H6.
Physical review. E
|August 16, 2023
概括
我们介绍了一种新的扰动方法,用于量子消散动力学. 这种技术揭示了量子连贯如何加速热平衡,提供了新的量子辅助的Mpemba效应.
科学领域:
- 量子物理学 量子物理学 是一种量子物理学.
- 量子动力学 量子动力学是什么?
- 统计力学 统计力学
背景情况:
- 马科夫量子散散动力学对于理解开放量子系统至关重要.
- 长期存在的量子连贯性可能会阻碍系统放松和热平衡.
研究的目的:
- 开发一种扰动技术,用于解决马科夫量子散散动力学.
- 分析量子连贯在热化中的作用.
- 展示一种加速放松过程的方法.
主要方法:
- 开发了一种扰动技术,使用一个小的自身光谱间隙作为扰动参数.
- 该方法应用于具有半退化的激发状态的三级系统.
- 分析解决方案是为了系统的动态而衍生出来的.
主要成果:
- 三级系统中的量子连贯性持续时间与能量分裂平方成反比例.
- 一种方法被证明可以超指数地加速热平衡,称为马科维量子辅助的Mpemba-like效应.
- 分析方法提供了精确的平衡时间表,突出了连贯和不连贯效应的相互作用.
结论:
- 开发的扰动技术为量子消散动力学提供了一种分析方法.
- 精心准备的初始状态与特定的连贯性可以大大加快放松.
- 这项工作为控制和加速量子系统平衡提供了洞察力.
相关概念视频
Phase Transitions: Vaporization and Condensation
17.7K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase...
17.7K
Path Between Thermodynamics States
3.2K
Consider the two thermodynamic processes involving an ideal gas that are represented by paths AC and ABC in Figure 1:
3.2K
Atomic Nuclei: Types of Nuclear Relaxation
323
Nuclear relaxation restores the equilibrium population imbalance and can occur via spin–lattice or spin–spin mechanisms, which are first-order exponential decay processes.
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers...
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers...
323
Thermal Sigmatropic Reactions: Overview
2.1K
Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in...
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in...
2.1K
The Quantum-Mechanical Model of an Atom
42.5K
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.
42.5K
Fermi Level Dynamics
284
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...
284

