相关实验视频
Updated: Jan 12, 2026

10:00
Gradient Echo Quantum Memory in Warm Atomic Vapor
Published on: November 11, 2013
13.2K
在变量量子自溶解器中快速无梯度优化激发
Jonas Jäger1,2,3,4, Thierry N Kaldenbach1, Max Haas1
1German Aerospace Center (DLR), Institute of Materials Research, Cologne, Germany.
概括
我们开发了ExcitationSolve,这是一款用于寻找分子基本状态的新型量子优化器. 这种新方法加速了量子化学计算,用更少的资源实现了高精度.
科学领域:
- 量子计算是一种量子计算.
- 计算化学是一种计算化学.
- 量子算法中的量子算法
背景情况:
- 变量量子自身溶解器 (VQEs) 是量子化学的关键.
- 目前的优化器在物理动机的运算中使用的复杂的激发运算符中扎.
- 像Rotosolve这样的现有方法仅限于更简单的操作类型.
研究的目的:
- 介绍ExcitationSolve,一个新的量子意识优化器.
- 将优化功能扩展到具有特定生成器属性的参数化单元 (G ^ 3 = G).
- 为量子化学中的激发运算符实现高效的优化.
主要方法:
- ExcitationSolve是一个全球知情,无梯度和无超参数的优化器.
- 它通过使用等同于一个梯度基础更新步骤的量子资源来确定每个参数的全球最佳值.
- 提供了固定的和适应性的策略,包括同时多次激发的优化.
主要成果:
- ExcitationSolve在分子基态能量基准上表现优于最先进的优化器.
- 快速实现平衡几何学的化学精度 (单参数扫描).
- 产生较浅的适应性应变,并证明对硬件噪声的稳定性.
结论:
- 激发解决方案在量子计算机上为量子化学提供了重大进展.
- 结合了物理洞察力和高效的优化,用于可扩展的计算.
- 为更准确,更高效的分子模拟铺平了道路.
相关概念视频
Equilibrium Conditions for a Particle
2.1K
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...
2.1K
Fermi Level Dynamics
640
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...
640
Free Energy Changes for Nonstandard States
13.4K
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:
13.4K
Euler Equations of Motion
586
Imagine a rigid body that is rotating at an angular velocity of ω within an inertial frame of reference. Along with this, picture a second rotating frame that is attached to the body itself. This frame moves along with the body and possesses an angular velocity of Ω. The total moment about the center of mass is calculated by adding the rate of change of angular momentum about the center of mass in relation to the rotating frame and the cross-product of the body's angular velocity...
586
Entropy Change in Reversible Processes
3.2K
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.
3.2K
Maxwell-Boltzmann Distribution: Problem Solving
2.8K
Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
2.8K

