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関連する概念動画

Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

28.3K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
28.3K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

45.2K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
45.2K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

52.7K
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.
52.7K
Structures of Solids02:22

Structures of Solids

15.9K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
15.9K
The de Broglie Wavelength02:32

The de Broglie Wavelength

30.2K
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...
30.2K
Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

10.2K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
10.2K

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Updated: Oct 11, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

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量子プロセッサの時間結晶固有状態の順序

Xiao Mi1, Matteo Ippoliti2, Chris Quintana1

  • 1Google Research, Mountain View, CA, USA.

Nature
|November 30, 2021
PubMed
まとめ
この要約は機械生成です。

研究者らは,多体局所システムにおいて,離散時間結晶 (DTC) を実験的に観測した. この非均衡相は,超伝導量子ビットを使用して,均衡状態とは異なるユニークな時空秩序を示しています.

さらに関連する動画

On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature
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On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature

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Gradient Echo Quantum Memory in Warm Atomic Vapor
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Gradient Echo Quantum Memory in Warm Atomic Vapor

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関連する実験動画

Last Updated: Oct 11, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

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On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature
07:42

On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature

Published on: March 11, 2022

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Gradient Echo Quantum Memory in Warm Atomic Vapor
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Gradient Echo Quantum Memory in Warm Atomic Vapor

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科学分野:

  • 量子物理学
  • 凝縮物質物理学
  • 量子情報科学

背景:

  • 量子多体系では 複雑な相が均衡状態にある.
  • 非均衡のシステムは,離散時間結晶 (DTC) のような新しいダイナミック・フェーズをホストすることができます.
  • これらのダイナミックな相を実験的に観察することは,一時的な行動のために困難です.

研究 の 目的:

  • 実験的に多体局所化された離散時間結晶 (MBL-DTC) を観測する.
  • 一般的な初期状態に対する MBL-DTC の特徴的な空間時間反応を実証する.
  • 量子プロセッサの非均衡相を研究するためのスケーラブルな方法を確立する.

主な方法:

  • 超伝導量子ビットに調節可能な制御相ゲート (CPHASE) の実装.
  • 時間の逆転プロトコルを利用して 脱合効果を評価する.
  • スペクトルサンプリングの課題を克服するために量子型性を採用します.
  • 実験的な有限サイズの分析を行い,相変化を特定する.

主要な成果:

  • 超伝導量子ビット配列におけるMBL-DTCの実験観測.
  • 一般的な初期状態に対する MBL-DTC の特徴的な空間時間的応答の実証.
  • デコヘレンスの影響と相変化の位置を成功裏に定量化した.

結論:

  • この研究は,MBL-DTCを別々の非均衡段階として実験的証拠を提供します.
  • 開発された方法は,新しい非均衡現象を研究するためのスケーラブルなアプローチを提供します.
  • この発見は,熱の均衡を超えた量子相の理解を進めている.