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Un sistema cuántico de espín de muchos cuerpos en un reloj de red óptica
M J Martin1, M Bishof, M D Swallows
1JILA, National Institute of Standards and Technology and University of Colorado, Boulder, CO 80309, USA. mjmartin@caltech.edu
Science (New York, N.Y.)
|August 10, 2013
Resumen
Los investigadores estudiaron sistemas cuánticos que interactúan fuertemente utilizando átomos de estroncio-87. Las mediciones de espín colectivo revelaron correlaciones de muchos cuerpos y ruido de espín, avanzando la investigación de la física cuántica de muchos cuerpos.
Área de la Ciencia:
- La física cuántica es la física cuántica.
- Física atómica La física atómica es la física de los átomos.
- Teoría de la materia condensada Teoría de la materia condensada
Sus antecedentes:
- Los sistemas cuánticos de muchos cuerpos que interactúan fuertemente son complejos y difíciles de resolver.
- Los átomos de estroncio-87 ((87) Sr) en las redes ópticas ofrecen un sistema controlable para estudiar estos efectos.
Objetivo del estudio:
- Para investigar los efectos cuánticos de muchos cuerpos en un sistema de dos niveles fuertemente interactuando.
- Para entender la dinámica y las correlaciones en tales sistemas utilizando (87) Sr estados de reloj. estados de reloj.
Principales métodos:
- Utilizó mediciones de espín colectivo en (87) átomos de Sr en una red óptica.
- Derivó un Hamiltoniano de muchos cuerpos para modelar los fenómenos observados.
Principales resultados:
- Firmas observadas del desarrollo de correlaciones de muchos cuerpos durante la evolución dinámica.
- Deterioro de la coherencia de espín atómico medido, desplazamientos de frecuencia dependientes de la densidad, formas de línea distorsionadas y ruido de espín correlacionado.
Conclusiones:
- El hamiltoniano derivado describe con éxito las observaciones experimentales.
- Los relojes ópticos de celosía altamente coherentes y controlados proporcionan una plataforma para explorar los efectos cuánticos de muchos cuerpos y el entrelazamiento.
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