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Teletransportación de puertas cuánticas entre qubits separados en un procesador de iones atrapados

Yong Wan^1,2, Daniel Kienzler^3,2, Stephen D Erickson^3,2

¹National Institute of Standards and Technology, Boulder, CO 80305, USA. yong.wan@nist.gov.

Science (New York, N.Y.)

|June 1, 2019

Resumen

La teletransportación de puerta cuántica (QGT) permite operaciones de qubit remotas esenciales para escalar las computadoras cuánticas. Este estudio demuestra QGT para una puerta NO controlada en una trampa de iones, logrando alta fidelidad.

Área de la Ciencia:

La computación cuántica
Ciencia de la información cuántica
Física atómica

Sus antecedentes:

Las computadoras cuánticas a gran escala requieren operaciones de puerta cuántica entre qubits distantes.
La teletransportación de puertas cuánticas (QGT) ofrece una solución utilizando operaciones locales, comunicación clásica y entrelazamiento.

Objetivo del estudio:

Para demostrar la teletransportación de puertas cuánticas (QGT) en una arquitectura de trampa de iones escalable.
Para teletransportar una puerta NOT controlada (CNOT) entre qubits separados espacialmente.

Principales métodos:

Utilizó el transporte de iones para el movimiento de qubits dentro de la trampa.
Puertas de un solo y dos qubits dirigidas individualmente (de la misma especie y de especies mixtas).
Se emplean operaciones condicionales en tiempo real y detecciones de un solo qubit.

Principales resultados:

Se ha demostrado con éxito la QGT determinista de una puerta CNOT entre qubits separados.
Logró una fidelidad de entrelazamiento para la puerta CNOT teletransportada en el rango (0.845, 0.872) con un 95% de confianza.
Herramientas esenciales integradas para escalar las computadoras cuánticas de iones atrapados.

Conclusiones:

El QGT demostrado es un paso crucial hacia la construcción de computadoras cuánticas de iones atrapados escalables.
Este trabajo valida la combinación de técnicas avanzadas para futuros procesadores cuánticos.

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