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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
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El qubit de cuasi carga superconductor
Ivan V Pechenezhskiy1, Raymond A Mencia1, Long B Nguyen1
1Department of Physics, University of Maryland, College Park, MD, USA.
Nature
|September 17, 2020
Resumen
Los investigadores presentan
Área de la Ciencia:
- La computación cuántica
- Circuitos superconductores
- Átomos artificiales
Sus antecedentes:
- Las uniones Josephson crean átomos artificiales para los qubits superconductores.
- Los qubits existentes incluyen tipos de carga, flujo y fase/transmón.
- La naturaleza dual de la carga y el flujo implica un tipo de qubit faltante.
Objetivo del estudio:
- Introducir un nuevo qubit superconductor llamado "blochnium".
- Aprovechar la respuesta aislante coherente de las uniones de Josephson.
- Investigar las fluctuaciones de fase extendidas más allá de 2π.
Principales métodos:
- Construye un circuito con una unión débil de Josephson desviada por una inductancia extremadamente alta.
- Medir el espectro de excitación por radiofrecuencia.
- Analizar la sensibilidad del flujo y compararlo con los modelos teóricos.
Principales resultados:
- Demostrar el carácter aislante único del qubit de "blochnium".
- Observar la sensibilidad al flujo de fuga para la transición del estado de base al estado de primera excitación.
- El espectro coincide con el mapeo de dualidad de un transmon con nuevas variables.
Conclusiones:
- El qubit "blochnium" es el par que falta a los qubits superconductores existentes.
- Este descubrimiento abre nuevas vías para la dinámica cuántica macroscópica.
- Aplicaciones potenciales en computación cuántica y metrología.
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