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An atom comprises protons and neutrons, which are contained inside the dense, central core called the nucleus, with electrons present around the nucleus. Taking into account the wave–particle duality of electrons and the uncertainty in position around the nucleus, quantum mechanics provides a more accurate model for the atomic structure. It describes atomic orbitals as the regions around the nucleus where electrons of discrete energy exist, characterized by four quantum...
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Calculando con precisión las propiedades electrónicas de un anillo cuántico

C Neill1, T McCourt1, X Mi1

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Este estudio presenta un método de simulación cuántica preciso que utiliza qubits superconductores para investigar sistemas de materia condensada. El enfoque logra una alta fidelidad, lo que permite la exploración de nuevos materiales cuánticos.

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Área de la Ciencia:

  • Simulación Cuántica
  • Física de la materia condensada
  • Los Qubits superconductores

Sus antecedentes:

  • La simulación cuántica ofrece una vía prometedora para estudiar sistemas complejos de materia condensada.
  • Los métodos de simulación cuántica actuales carecen de la precisión requerida para superar los enfoques computacionales clásicos.

Objetivo del estudio:

  • Desarrollar y demostrar un plan de simulación cuántica preciso para investigar las propiedades electrónicas fundamentales de los sistemas de materia condensada.
  • Para comparar el método de simulación mediante la reconstrucción de la estructura de la banda de un cable unidimensional.

Principales métodos:

  • Utilizó una plataforma de 18 qubits superconductores para la simulación cuántica.
  • Técnicas aplicadas para la descoherencia y la mitigación de los errores de lectura.
  • Transformaciones de Fourier empleadas para analizar valores propios de energía y propiedades espectrales.
  • Flujo magnético sintetizado y potenciales locales desordenados para imitar las condiciones de la materia condensada.

Principales resultados:

  • Se ha conseguido una medición de alta fidelidad de los valores propios de la energía con un error de aproximadamente 0,01 rad.
  • Demostró una incertidumbre estadística de 10^-4 rad en la resolución de las energías propias.
  • Se han observado cruces de nivel evitados al barrer el flujo magnético, lo que revela una distribución desordenada.
  • Propiedades electrónicas reconstruidas, incluidas las corrientes persistentes y la supresión de la conductancia inducida por el desorden.

Conclusiones:

  • Desarrolló un método preciso de simulación cuántica adecuado para el estudio de sistemas de materia condensada.
  • El enfoque allana el camino para explorar nuevos materiales cuánticos utilizando qubits superconductores.
  • Se mitigaron con éxito los errores clave en el cálculo cuántico, mejorando la fidelidad de la simulación.