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Enfoque de Transporte para la Tomografía de Estados Cuánticos

Jeanne Bourgeois1,2,3, Gianmichele Blasi1, Géraldine Haack1

  • 1University of Geneva, Department of Applied Physics, 1211 Geneva, Switzerland.

Physical review letters
|January 26, 2026
PubMed
Resumen

Este estudio introduce un nuevo método para la tomografía de estados cuánticos (QST) utilizando mediciones de transporte en sistemas cuánticos abiertos. Este enfoque reconstruye estados cuánticos sin aislar el sistema, ofreciendo nuevas perspectivas sobre el procesamiento de información cuántica.

Palabras clave:
tomografía de estados cuánticossistemas cuánticos abiertosmediciones de transporteinformación cuánticafísica mesoscópica

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Área de la Ciencia:

  • Ciencia de la Información Cuántica
  • Física Mesoscópica
  • Computación Cuántica

Sus antecedentes:

  • La tomografía de estados cuánticos (QST) es crucial para las tecnologías cuánticas, pero tradicionalmente requiere aislar los sistemas cuánticos.
  • La disipación ambiental plantea un desafío para los métodos convencionales de QST.

Objetivo del estudio:

  • Desarrollar un método novedoso de QST que utilice mediciones de transporte en sistemas cuánticos abiertos.
  • Permitir la reconstrucción del estado cuántico sin aislar el sistema de su entorno.

Principales métodos:

  • Medición de corrientes y cantidades de transporte en un sistema cuántico en una configuración abierta.
  • Utilización de una relación exacta entre las cantidades de transporte y los subespacios de Krylov del Lindbladian.
  • Aplicación del método a un sistema de dos qubits en una configuración de dos terminales.

Principales resultados:

  • Reconstruyó con éxito el estado cuántico de un sistema de dos qubits utilizando mediciones de transporte.
  • Desarrolló una medida de entrelazamiento basada en el transporte que cuantifica la concurrencia utilizando promedios de corriente y funciones de correlación.
  • Estableció un marco analítico que conecta el transporte mesoscópico y el procesamiento de información cuántica abierta.

Conclusiones:

  • Las mediciones de transporte ofrecen una alternativa viable para la QST en sistemas cuánticos abiertos.
  • Los hallazgos proporcionan información fundamental sobre el procesamiento de información cuántica en entornos disipativos.
  • Este trabajo une la física mesoscópica y la teoría de la información cuántica, permitiendo nuevas aplicaciones.