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Videos de Conceptos Relacionados

Stereoisomerism02:52

Stereoisomerism

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Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
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Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

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Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
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¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

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Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
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Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

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NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
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Classifying Matter by State02:49

Classifying Matter by State

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Chemistry is the study of matter and the changes it undergoes. Matter is anything that has mass and occupies space. Matter is all around us; the air, water, soil, mountains, even our bodies are all examples of matter. Matter is divided into three states — solid, liquid, and gas — that are commonly found on earth. The fourth state of matter, plasma, occurs naturally in the interiors of stars. 
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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.
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Video Experimental Relacionado

Updated: Jan 8, 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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Estados ópticos con mayor rango estelar

Jan Provazník, Olga Solodovnikova, Radim Filip

    Optics express
    |December 19, 2025
    PubMed
    Resumen

    La preparación de estados cuánticos no gaussianos para la información cuántica es difícil. Este estudio identifica la eficiencia mínima del detector y la calidad del aplastamiento necesarias para la creación experimental fiable de estos estados.

    Área de la Ciencia:

    • Óptica cuántica
    • Ciencia de la información cuántica

    Sus antecedentes:

    • Los estados cuánticos no gaussianos son esenciales para el procesamiento avanzado de información cuántica.
    • La generación experimental de estos estados, especialmente para fotones individuales, presenta desafíos significativos.

    Objetivo del estudio:

    • Determinar los requisitos experimentales mínimos para crear estados cuánticos no gaussianos certificables.
    • Analizar el impacto de la eficiencia del detector y la calidad del aplastamiento en la preparación del estado.

    Principales métodos:

    • Análisis teórico de los requisitos para la generación de estados cuánticos no gaussianos.
    • Enfoque en parámetros experimentales: eficiencia cuántica del detector de resolución de número de fotones y calidad de la operación de aplastamiento.
    • Consideración de estados con tres, cuatro y cinco fotones.

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    Principales resultados:

    • Cuantificación de la eficiencia cuántica necesaria para detectores de resolución de número de fotones.
    • Determinación de la calidad requerida para la operación de aplastamiento.
    • Identificación de las condiciones de viabilidad para la realización experimental.

    Conclusiones:

    • Ahora se definen los requisitos mínimos para la preparación de estados cuánticos no gaussianos.
    • Este trabajo proporciona una guía práctica para los experimentalistas.
    • Permite una generación más fiable de estados cuánticos cruciales para el procesamiento de información.