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Observación del aislador topológico de Anderson en cables atómicos desordenados

Eric J Meier¹, Fangzhao Alex An¹, Alexandre Dauphin²

¹Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801-3080, USA.

Science (New York, N.Y.)

|October 13, 2018

Resumen

Los investigadores exploraron el transporte cuántico en cables simétricos quirales de una dimensión. Descubrieron una fase de aislamiento topológico de Anderson donde el desorden induce una transición de la topología trivial a la no trivial, demostrando robustez al desorden débil.

Área de la Ciencia:

Física de la materia condensada
Simulación Cuántica
Física atómica

Sus antecedentes:

La topología y el desorden influyen significativamente en los fenómenos de transporte cuántico.
Comprender su interacción es crucial para desarrollar nuevos materiales y dispositivos cuánticos.

Objetivo del estudio:

Investigar los efectos combinados de la topología y el desorden en el transporte cuántico en cables simétricos quirales unidimensionales.
Realizar y caracterizar experimentalmente la fase de aislamiento topológico de Anderson.

Principales métodos:

Sintetizó cables simétricos quirales unidimensionales utilizando ingeniería hamiltoniana espectroscópica.
Empleado acoplamiento impulsado por láser de estados de momento discretos de átomos ultrafríos.
Indicadores topológicos a granel medidos después de un apagado cuántico.

Principales resultados:

Observó la fase de aislamiento topológico de Anderson, donde el aumento del desorden impulsa una transición de la topología de la estructura de banda trivial a no trivial.
Demostró la robustez de los cables topológicamente no triviales contra el desorden débil.
Cuantificó la transición a una fase trivial bajo condiciones de fuerte desorden.

Conclusiones:

El estudio proporciona evidencia experimental para la fase de aislamiento topológico de Anderson en una plataforma de simulación cuántica controlable.
Los hallazgos destacan el papel crítico del desorden en la modulación de las propiedades topológicas de los sistemas cuánticos.
El trabajo futuro puede explorar fluidos topológicos que interactúan fuertemente utilizando esta plataforma.

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