Search research articles

ACERCA DE JoVE

Visión General Liderazgo Blog Centro de Ayuda JoVE

AUTORES

Proceso de Publicación Consejo Editorial Alcance y Políticas Revisión por Pares Preguntas Frecuentes Enviar

BIBLIOTECARIOS

Testimonios Suscripciones Acceso Recursos Consejo Asesor de Bibliotecas Preguntas Frecuentes

INVESTIGACIÓN

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archivo

EDUCACIÓN

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Centro de Recursos para Profesores Sitio de Profesores

Términos y Condiciones de Uso

Política de Privacidad

Videos de Conceptos Relacionados

Atomic Nuclei: Nuclear Relaxation Processes

Atomic Nuclei: Nuclear Relaxation Processes

In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis, the precessing magnetic moments are randomly oriented around the z-axis. This...

Atomic Nuclei: Nuclear Spin State Overview

Atomic Nuclei: Nuclear Spin State Overview

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...

Spin–Spin Coupling Constant: Overview

Spin–Spin Coupling Constant: Overview

In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...

Atomic Nuclei: Types of Nuclear Relaxation

Atomic Nuclei: Types of Nuclear Relaxation

Nuclear relaxation restores the equilibrium population imbalance and can occur via spin–lattice or spin–spin mechanisms, which are first-order exponential decay processes.
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers energy to a nearby...

Spin–Spin Coupling: One-Bond Coupling

Spin–Spin Coupling: One-Bond Coupling

Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...

Valence Bond Theory

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por

Same author

Beyond the surface: a case report of penile tuberculosis as the first sign of miliary disease in a solid organ transplant recipient.

ASM case reports·2026

Same author

An operating system for executing applications on quantum network nodes.

Nature·2025

Same author

Efficient and robust estimation of many-qubit Hamiltonians.

Nature communications·2024

Same author

Dynamical Polarization of the Fermion Parity in a Nanowire Josephson Junction.

Physical review letters·2023

Same author

Complete mesocolic excision for right hemicolectomy: an updated systematic review and meta-analysis.

Techniques in coloproctology·2023

Same author

Frequency division multiplexing readout of a transition edge sensor bolometer array with microstrip-type electrical bias lines.

The Review of scientific instruments·2022

Search research articles

Video Experimental Relacionado

Updated: Jun 8, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

Desacoplamiento dinámico universal de un solo espín de estado sólido de un baño de espín.

G de Lange¹, Z H Wang, D Ristè

¹Kavli Institute of Nanoscience Delft, Delft University of Technology, Post Office Box 5046, 2600 GA Delft, Netherlands.

Science (New York, N.Y.)

|September 11, 2010

Resumen

Los investigadores suprimieron las interacciones del sistema cuántico con su entorno utilizando el desacoplamiento dinámico de doble eje. Este método mejoró significativamente los tiempos de coherencia para los estados cuánticos, superando un desafío clave en la ciencia de la información cuántica.

Más Videos Relacionados

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Videos de Experimentos Relacionados

Last Updated: Jun 8, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Área de la Ciencia:

Ciencias de la información cuántica Ciencias de la información cuántica.
El control cuántico es el control cuántico.
Sistemas Cuánticos de Estado Sólido.

Sus antecedentes:

Controlar las interacciones del sistema cuántico con el medio ambiente es crucial para las tecnologías cuánticas.
El ruido ambiental conduce a la decoherencia, limitando la computación cuántica y la detección.

Objetivo del estudio:

Para suprimir el acoplamiento entre un solo giro en el diamante y su baño de giro circundante.
Para preservar la coherencia para estados cuánticos arbitrarios.
Para mejorar los tiempos de coherencia más allá de los métodos convencionales.

Principales métodos:

Utilizó un desacoplamiento dinámico de doble eje para controlar las interacciones ambientales.
Tomografía de proceso cuántico empleada para verificar la preservación de la coherencia.
Investigó el escalamiento de la mejora de la coherencia con el número de pulsos de desacoplamiento.

Principales resultados:

Se logró una fuerte supresión del acoplamiento de baño de giro para un solo giro de diamante.
Preservación de la coherencia demostrada para todos los estados cuánticos probados.
Se observó una mejora significativa en el tiempo de coherencia, superior a 25 veces la del eco de espín.
Mejora del tiempo de coherencia a escala con el número de pulsos de desacoplamiento sin límites observados hasta 136 pulsos.

Conclusiones:

El desacoplamiento dinámico de doble eje ofrece un método poderoso para preservar la coherencia cuántica.
Esta técnica supera un obstáculo importante para la implementación de protocolos de información cuántica robustos.
Abre nuevas vías para la ciencia cuántica experimental y las tecnologías cuánticas escalables.