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Umbrales de termalización emergentes en dinámicas unitarias de sistemas cuánticos desordenados inhomogéneamente
Soumya Kanti Pal1, C L Sriram1, Shamik Gupta1
1Tata Institute of Fundamental Research, Department of Theoretical Physics, Homi Bhabha Road, Mumbai 400005, India.
Physical review. E
|February 20, 2026
Resumen
Una cadena desordenada grande puede impulsar la termialización en una cadena más pequeña, revelando regímenes distintos de termialización completa, dependiente de la realización o ausente en función de la fuerza del desorden. Esto pone de relieve los umbrales de termialización emergentes en sistemas cuánticos cerrados.
Área de la Ciencia:
- La física cuántica es la física 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
- La mecánica estadística es la mecánica estadística.
Sus antecedentes:
- La inestabilidad de la localización de muchos cuerpos (MBL) a menudo se estudia en sistemas desordenados.
- Las configuraciones convencionales exploran la localización en sistemas fuertemente desordenados.
Objetivo del estudio:
- Investigar la termialización en un sistema cuántico compuesto con desorden inhomogéneo.
- Explore el papel de una cadena grande de desorden débil en la conducción de la termalización de una cadena más pequeña y fuertemente desordenada.
Principales métodos:
- Evolución unitaria de un sistema cuántico compuesto.
- Utilizando las mediciones de transporte como una sonda dinámica.
- Analizando los regímenes de termicidad basados en la fuerza del trastorno.
Principales resultados:
- Se identificaron tres regímenes de termicidad: completo (trastorno débil), dependiente de la realización (trastorno intermedio) y ausente (trastorno fuerte).
- Se observó que el régimen de no auto-promedio se expande con el tamaño de la cadena débilmente desordenada.
- Se demostró una interacción entre la fuerza del trastorno y el tamaño del sistema que influye en la termalización.
Conclusiones:
- El desorden inhomogéneo puede inducir umbrales de termalización emergentes en sistemas cuánticos cerrados.
- Proporciona acceso directo a los regímenes de desorden para observar la termicidad o su ausencia.
- Ofrece información sobre la dinámica de la termalización en sistemas cuánticos desordenados.
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