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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
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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
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.
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.
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