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Coherencia cuántica en sistemas de tres niveles bajo el efecto combinado del efecto Stark y el medio de Kerr no
S Jamal Anwar1, M Ibrahim2, M Khalid Khan2
1Department of Physics, Quaid-I-Azam University, Islamabad, 45320, Pakistan. sjamalanwar@gmail.com.
Scientific reports
|December 19, 2025
Resumen
Este estudio explora la dinámica cuántica en sistemas atómicos dentro de un medio no lineal. Una menor no linealidad de Kerr provoca un rápido crecimiento del entrelazamiento y una rápida desintegración de la precisión, mientras que valores más altos estabilizan las propiedades cuánticas para la metrología.
Área de la Ciencia:
- Óptica Cuántica
- Física Atómica
- Ciencia de la Información Cuántica
Sus antecedentes:
- Investiga sistemas atómicos de tres niveles que interactúan con un medio de Kerr no lineal (NLKM).
- Se centra en la interconexión entre la información cuántica de Fisher (QFI) y la entropía de Von Neumann (VNE).
- Examina las interacciones mediadas por fotones y su influencia en la dinámica cuántica.
Objetivo del estudio:
- Analizar la evolución temporal de la QFI y la VNE bajo parámetros variables del sistema.
- Comprender cómo la no linealidad de Kerr (χ), los desplazamientos de Stark (β), la fase (ϕ) y el número de fotones afectan la dinámica cuántica.
- Explorar el potencial del sistema para la metrología cuántica y el procesamiento de información.
Principales métodos:
- Análisis de la información cuántica de Fisher (QFI) para la precisión de la estimación de parámetros.
- Medición de la entropía de Von Neumann (VNE) para cuantificar el entrelazamiento cuántico (QE).
- Simulaciones que rastrean la evolución temporal de la dinámica del sistema bajo diferentes condiciones.
Principales resultados:
- La menor no linealidad de Kerr (χ) conduce a una desintegración oscilatoria de la QFI y a un rápido crecimiento de la VNE.
- Valores más altos de χ estabilizan la QFI y la VNE, suprimiendo la decoherencia y las fluctuaciones del entrelazamiento.
- El aumento del número de fotones mejora la estabilidad y reduce las fluctuaciones cuánticas, especialmente a χ bajas.
Conclusiones:
- La dinámica cuántica del sistema es sintonizable a través de la no linealidad de Kerr y la densidad de fotones.
- Los hallazgos resaltan el sistema como una plataforma para la metrología cuántica y el procesamiento de información.
- Las interacciones de Kerr pueden suprimir la coherencia a largo plazo, mientras que los desplazamientos de Stark pueden inducir correlaciones cuánticas transitorias.
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