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Fórmula extendida de Landauer-Büttiker para corriente a través de sistemas cuánticos abiertos con ganancia o pérdida
1Southern University of Science and Technology, Shenzhen Institute for Quantum Science and Engineering, Shenzhen 518055, China, International Quantum Academy, Shenzhen 518048, China, and Guangdong Provincial Key Laboratory of Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
Physical review letters
|February 22, 2026
Resumen
Este estudio extiende la fórmula de Landauer-Büttiker a sistemas con ganancia o pérdida, revelando cómo estos factores influyen en las corrientes de partículas y energía y las propiedades de transporte en sistemas abiertos.
Área de la Ciencia:
- Física de la materia condensada
- Fenómenos de transporte cuántico
Sus antecedentes:
- La fórmula de Landauer-Büttiker es fundamental para comprender el transporte eléctrico en sistemas mesoscópicos.
- Los sistemas cuánticos abiertos con ganancia o pérdida presentan desafíos únicos para la descripción teórica.
Objetivo del estudio:
- Extender el formalismo de Landauer-Büttiker para describir el transporte en sistemas con ganancia o pérdida.
- Investigar el impacto de la ganancia y la pérdida en las corrientes de partículas y energía.
Principales métodos:
- Se utilizó el formalismo de Lindblad-Keldysh.
- Se derivó una fórmula extendida de Landauer-Büttiker para sistemas abiertos.
Principales resultados:
- La ganancia y la pérdida influyen significativamente en las propiedades de transporte.
- La ruptura de la simetría de inversión y el desorden pueden inducir corriente.
- Se analizaron los efectos de la ganancia/pérdida en las conductancias térmica y eléctrica.
- Se investigó el efecto de piel no hermitiano debido a la pérdida de enlaces.
Conclusiones:
- La fórmula extendida proporciona nuevas perspectivas sobre el transporte en sistemas abiertos.
- La ganancia y la pérdida son factores cruciales para determinar la generación de corriente y las características de transporte.
- Este trabajo profundiza la comprensión del transporte cuántico en sistemas fuera de equilibrio.
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