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Termalización cuántica a través del entrelazamiento en un sistema aislado de muchos cuerpos
Adam M Kaufman1, M Eric Tai1, Alexander Lukin1
1Department of Physics, Harvard University, Cambridge, MA 02138, USA.
Science (New York, N.Y.)
|August 20, 2016
Resumen
El entrelazamiento cuántico impulsa el surgimiento de la mecánica estadística en sistemas cuánticos aislados. La entropía de entrelazamiento imita localmente la entropía térmica, validando la física estadística para las propiedades observables.
Área de la Ciencia:
- La física cuántica
- Mecánica estadística
- Información cuántica
Sus antecedentes:
- Los sistemas cuánticos aislados en estados puros exhiben entropía cero durante la evolución unitaria.
- La mecánica estadística generalmente asume el equilibrio térmico y la maximización de la entropía del sistema.
- Conciliar la dinámica cuántica con la termodinámica es un reto fundamental.
Objetivo del estudio:
- Investigar experimentalmente el surgimiento de la mecánica estadística de sistemas cuánticos aislados.
- Para aclarar el papel del entrelazamiento cuántico en este proceso de emergencia.
- Validar la aplicación de la física estadística a los observables locales en los sistemas cuánticos.
Principales métodos:
- Utilizando técnicas avanzadas de microscopía para observar un sistema cuántico en evolución.
- Medición directa de la entropía del entrelazamiento dentro del estado cuántico.
- Comparar las observaciones experimentales con las predicciones teóricas, incluida la hipótesis de termialización de estados propios.
Principales resultados:
- El estado cuántico general del sistema se mantuvo puro, contrario a las expectativas clásicas de entropía.
- Se observó una termalización local, lo que indica un comportamiento termodinámico emergente.
- Se encontró que la entropía de entrelazamiento se correlaciona directamente con la entropía térmica local y actúa como tal.
Conclusiones:
- El entrelazamiento cuántico es crucial para el surgimiento de la mecánica estadística en sistemas cuánticos aislados.
- La entropía de entrelazamiento proporciona una base mecánica cuántica para la entropía térmica local.
- Los hallazgos experimentales apoyan la hipótesis de la termualización de estados propios y la validez de la física estadística para los observables locales.
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