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Quantum Numbers02:43

Quantum Numbers

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It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
52.4K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

59.8K
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.
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Protein-protein Interfaces02:04

Protein-protein Interfaces

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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
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Protein-Protein Interfaces02:04

Protein-Protein Interfaces

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2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)01:19

2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)

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Heteronuclear single-quantum correlation spectroscopy (HSQC) is a 2D NMR technique that reveals one-bond correlations between hydrogen and a heteronucleus. The HSQC experiment is similar to the heteronuclear correlation experiment (HETCOR) but is more sensitive. In the HSQC spectrum, the proton chemical shift is plotted on the horizontal F2 axis, while the 13C chemical shift is plotted on the vertical F1 axis. The corresponding proton and 13C spectra are also shown. The HSQC contour plot does...
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Properties of Enantiomers and Optical Activity02:24

Properties of Enantiomers and Optical Activity

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It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
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Updated: Feb 14, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Una interfaz óptica cuántica topológica

Sabyasachi Barik1,2, Aziz Karasahin3, Christopher Flower1,2

  • 1Department of Physics, University of Maryland, College Park, MD 20742, USA.

Science (New York, N.Y.)
|February 14, 2018
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores crearon interfaces cuánticas robustas utilizando cristales fotónicos topológicos. Esto permite la emisión de luz quiral, allanando el camino para dispositivos ópticos cuánticos protegidos para simulación y detección.

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Área de la Ciencia:

  • La óptica cuántica
  • Física de la materia condensada
  • La fotónica

Sus antecedentes:

  • La topología en óptica ofrece dispositivos fotónicos resistentes al desorden.
  • El fuerte acoplamiento de materia ligera en la fotónica topológica cuántica está poco explorado.

Objetivo del estudio:

  • Para demostrar una fuerte interfaz entre emisores cuánticos individuales y estados fotónicos topológicos.
  • Para explorar los fenómenos cuánticos en sistemas fotónicos topológicos.

Principales métodos:

  • Fabricación de cristales fotónicos topológicos.
  • Creación de estados de borde de contrapropagación en los límites del cristal.
  • Acoplamiento de emisores cuánticos individuales a estos estados de borde.

Principales resultados:

  • Demostración de la emisión quiral de los emisores cuánticos en los estados de borde topológico.
  • Observación de estados de borde robusto resistentes a las curvas agudas.
  • Establecimiento de una fuerte interfaz luz-materia en el régimen cuántico.

Conclusiones:

  • El enfoque desarrollado permite interfaces cuánticas robustas con estados fotónicos topológicos.
  • Este trabajo abre caminos para dispositivos ópticos cuánticos con protección incorporada.
  • Las aplicaciones potenciales incluyen la simulación cuántica y las tecnologías avanzadas de detección.