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Power Dissipated in a Circuit: Problem Solving

Power Dissipated in a Circuit: Problem Solving

The equivalent resistance of a combination of resistors depends on their values and how they are connected.
The simplest combinations of resistors are series and parallel connections. In a series circuit, the first resistor's output current flows into the second resistor's input; therefore, each resistor's current is the same. Thus, the equivalent resistance is the algebraic sum of the resistances. The current through the circuit can be found from Ohm's law and is equal to the...

The Energies of Atomic Orbitals

The Energies of Atomic Orbitals

In an atom, the negatively charged electrons are attracted to the positively charged nucleus. In a multielectron atom, electron-electron repulsions are also observed. The attractive and repulsive forces are dependent on the distance between the particles, as well as the sign and magnitude of the charges on the individual particles. When the charges on the particles are opposite, they attract each other. If both particles have the same charge, they repel each other.

Atomic Structure

Atomic Structure

Atomic Mass

Atomic Mass

Atoms — and the protons, neutrons, and electrons that compose them — are extremely small. For example, a carbon atom weighs less than 2 × 10−23 g. When describing the properties of tiny objects such as atoms, we use appropriately small units of measure, such as the atomic mass unit (amu). The amu was originally defined based on hydrogen, the lightest element, then later in terms of oxygen. Since 1961, it has been defined with regard to the most abundant isotope of carbon, atoms of which...

Atomic Orbitals

Atomic Orbitals

An atomic orbital represents the three-dimensional regions in an atom where an electron has the highest probability to reside. The radial distribution function indicates the total probability of finding an electron within the thin shell at a distance r from the nucleus. The atomic orbitals have distinct shapes which are determined by l, the angular momentum quantum number. The orbitals are often drawn with a boundary surface, enclosing densest regions of the cloud.

Hybridization of Atomic Orbitals I

Hybridization of Atomic Orbitals I

The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...

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Updated: Jan 22, 2026

Neutron Crystallography Data Collection and Processing for Modelling Hydrogen Atoms in Protein Structures

Neutron Crystallography Data Collection and Processing for Modelling Hydrogen Atoms in Protein Structures

Published on: December 1, 2020

相互作用するリュードベリ原子の集団的散逸エンジニアリング

Tao Chen^1,2,3, Chenxi Huang^1,2, Jacob P Covey¹

¹University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA.

Physical review letters

|January 20, 2026

まとめ

この要約は機械生成です。

エンジニアリングされた散逸は、新しい量子制御を提供する。研究者たちは、レーザー誘起原子損失を開発して量子状態を操作し、相互作用効果を明らかにし、量子システムの新しい準備法を可能にした。

キーワード:

リュードベリ原子散逸エンジニアリング量子制御量子状態準備量子物理学

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Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

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Dissipative Microgravimetry to Study the Binding Dynamics of the Phospholipid Binding Protein Annexin A2 to Solid-supported Lipid Bilayers Using a Quartz Resonator

Dissipative Microgravimetry to Study the Binding Dynamics of the Phospholipid Binding Protein Annexin A2 to Solid-supported Lipid Bilayers Using a Quartz Resonator

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Last Updated: Jan 22, 2026

Neutron Crystallography Data Collection and Processing for Modelling Hydrogen Atoms in Protein Structures

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Dissipative Microgravimetry to Study the Binding Dynamics of the Phospholipid Binding Protein Annexin A2 to Solid-supported Lipid Bilayers Using a Quartz Resonator

Dissipative Microgravimetry to Study the Binding Dynamics of the Phospholipid Binding Protein Annexin A2 to Solid-supported Lipid Bilayers Using a Quartz Resonator

Published on: November 1, 2018

科学分野:

量子物理学
原子物理学
量子光学

背景:

工学化された散逸は、量子状態制御のための新しいアプローチです。
高忠実度の準備、転送、安定化、および新しい量子相転移へのアクセスを可能にします。
開いた量子系の制御は、量子技術にとって重要です。

研究の目的:

個々のリュードベリ原子のための調整可能で状態分解可能なレーザー誘起損失チャネルを実現すること。
非相互作用および強く相関する設定の両方における工学的散逸の効果を探求すること。
相関量子状態の散逸準備のための新しい方法を実証すること。

主な方法:

調整可能で状態分解可能なレーザー誘起損失チャネルを作成するためにリュードベリ原子を利用すること。
個々の原子および強く相関する設定を調査すること。
工学化された散逸を伴う多体鎖の理論的モデリング。

主要な成果:

量子ゼノンおよび反ゼノン領域間の例外的な点の相互作用駆動シフトを明らかにした。
相互作用強化崩壊を実証した。
ターゲットスピン状態を凍結する構成選択的二体ゼノン効果を観察した。
多体鎖における望ましくないスピン構成の散逸蒸留を理論的に示した。

結論:

強く相互作用する開いた量子スピン系を探求するための汎用的なアプローチを確立した。
リュードベリ原子アレイにおける相関量子状態の散逸準備のための新しいルーチンを開いた。
量子状態制御および新しい相転移のための工学化された散逸の可能性を強調した。