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関連する概念動画

Phase Transitions02:31

Phase Transitions

23.4K
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...
23.4K
Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

15.4K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
15.4K
Phase Transitions: Sublimation and Deposition02:33

Phase Transitions: Sublimation and Deposition

20.5K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
20.5K
Phase Diagram01:19

Phase Diagram

7.1K
The phase of a given substance depends on the pressure and temperature. Thus, plots of pressure versus temperature showing the phase in each region provide considerable insights into the thermal properties of substances. Such plots are known as phase diagrams. For instance, in the phase diagram for water (Figure 1), the solid curve boundaries between the phases indicate phase transitions (i.e., temperatures and pressures at which the phases coexist).
7.1K
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

1.2K
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
1.2K
Phase Transitions: Vaporization and Condensation02:39

Phase Transitions: Vaporization and Condensation

21.7K
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 molecules...
21.7K

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関連する実験動画

Updated: Feb 24, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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一次元の量子接触プロセスにおける安定状態の相変化

Lin Shang1, Shuai Geng1, Xingli Li2

  • 1Dalian University of Technology, School of Physics, 116024 Dalian, China.

Physical review letters
|February 22, 2026
PubMed
まとめ
この要約は機械生成です。

私たちは,1D量子接触プロセスモデルで不連続の相変化を明らかにし,システムのメタスタビリティを明らかにします. 安定状態の相に関する私たちの発見は,ライドバーグ原子量子シミュレータを使用してテストすることができます.

さらに関連する動画

Phase Behavior of Charged Vesicles Under Symmetric and Asymmetric Solution Conditions Monitored with Fluorescence Microscopy
10:08

Phase Behavior of Charged Vesicles Under Symmetric and Asymmetric Solution Conditions Monitored with Fluorescence Microscopy

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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

7.6K

関連する実験動画

Last Updated: Feb 24, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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Phase Behavior of Charged Vesicles Under Symmetric and Asymmetric Solution Conditions Monitored with Fluorescence Microscopy
10:08

Phase Behavior of Charged Vesicles Under Symmetric and Asymmetric Solution Conditions Monitored with Fluorescence Microscopy

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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

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科学分野:

  • 量子物理学とは,量子物理学のことです.
  • 統計学の力学 統計学の力学
  • 凝縮物質理論は,凝縮物質理論である.

背景:

  • 一次元の量子接触プロセスは,非均衡量子力学の研究の重要なモデルである.
  • 安定状態の相と相移行を理解することは,複雑な量子システムの特徴づけに不可欠です.

研究 の 目的:

  • 一次元の量子接触プロセスの安定状態の相と相移行を調査する.
  • システムのメタスタビリティと相変化の性質を分析する.

主な方法:

  • 熱力学限界におけるリウヴィリアンギャップの計算.
  • 平均場近似の適用で,新しい自己一貫した有効場条件.
  • 磁気感受性を分析するためにリンクされたクラスタの拡張.

主要な成果:

  • 一次元の量子接触プロセスで発見されたメタスタビリティ.
  • 順序パラメータのサドルノードバイフォーケーションによって特徴づけられる不連続の相変遷を特定しました.
  • 無限サイズのシステムの相変化点を抽出しました.
  • 安定状態の磁気感受性の単調な減少が実証され,相関長さの分散を否定した.

結論:

  • 一次元の量子接触プロセスは,メタスタビリティと不連続の相変遷を示しています.
  • 採用された平均場アプローチは,メタステーブル状態の干渉を効果的に回避します.
  • 結果は,量子シミュレータ,特にライドバーグ原子を使用する量子シミュレータのテスト可能な予測を提供します.