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¹H NMR: Interpreting Distorted and Overlapping Signals01:02

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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.
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The de Broglie Wavelength02:32

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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...
Standing Waves in a Cavity01:28

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Video Experimental Relacionado

Updated: May 26, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Ondas parciales sintéticas en colisiones atómicas ultrafrías.

R A Williams1, L J LeBlanc, K Jiménez-García

  • 1Joint Quantum Institute (JQI), National Institute of Standards and Technology (NIST), and University of Maryland, Gaithersburg, MD 20899, USA.

Science (New York, N.Y.)
|December 14, 2011
PubMed
Resumen

Los investigadores modificaron las interacciones de los átomos ultrafríos utilizando la luz. Esta técnica crea interacciones de largo alcance, permitiendo simulaciones cuánticas de sistemas exóticos como los fermiones de Majorana.

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Área de la Ciencia:

  • Física atómica La física atómica es la física de los átomos.
  • Simulación cuántica de la simulación cuántica.
  • Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada

Sus antecedentes:

  • Las interacciones de partículas son dependientes del medio ambiente.
  • Los átomos ultrafríos proporcionan un sistema controlable para el estudio de los fenómenos cuánticos.
  • Las interacciones estándar en átomos ultrafríos suelen ser de corto alcance.

Objetivo del estudio:

  • Demostrar una técnica para modificar las interacciones entre átomos ultrafríos.
  • Para crear una interacción efectiva de un rango enormemente mayor.
  • Para permitir la simulación cuántica de sistemas exóticos.

Principales métodos:

  • Vestir los estados atómicos desnudos con luz.
  • La colisión de dos condensados atómicos neutros de Bose-Einstein, vestidos ópticamente.
  • Analizando las distribuciones de dispersión para las contribuciones del momento angular.

Principales resultados:

  • Se lograron interacciones efectivas de un rango enormemente mayor.
  • Diseminación observada de estados finitos de momento angular relativo.
  • Se detectaron contribuciones de ondas d y g en átomos dispersos, que se desvían de la distribución habitual de ondas s.

Conclusiones:

  • Las interacciones atómicas inducidas por la luz ofrecen un nuevo mecanismo de control.
  • Esta técnica amplía el alcance de las posibilidades de simulación cuántica.
  • Las aplicaciones potenciales incluyen la simulación de sistemas con fermiones de Majorana.