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Superconductor01:24

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A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
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Types Of Superconductors01:28

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A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
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P-N junction01:11

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A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
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The nervous system consists of complex motor neuron circuits, including upper motor neurons originating from the cerebral cortex and lower motor neurons starting in the spinal cord, coordinating both voluntary and involuntary movements. Among these, somatic motor neurons activate skeletal muscles and are classified into alpha, beta, and gamma types. Alpha neurons are vital for voluntary movement coordination, while gamma neurons adjust muscle spindle sensitivity, and the function of beta...
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Anchoring Junctions01:03

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Anchoring junctions are multiprotein complexes that help cells connect to other cells and the extracellular matrix. Anchoring junctions are present on the lateral and basal surfaces of cells, providing strong and flexible connections. Focal adhesions are often formed due to cell interactions with the ECM substrata, which initiate signal transduction via kinase cascades and other mechanisms. Together, they provide stability and tissue integrity. There are three types of anchoring junctions:...
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Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types –  adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as  epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as  heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
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Transmon Qubit usando Sn como un superconductor de unión

Amrita Purkayastha1, Amritesh Sharma1, Param J Patel1

  • 1Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States.

Nano letters
|February 9, 2026
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores desarrollaron qubits transmon utilizando nanocables semiconductores, logrando frecuencias ajustables y tiempos de coherencia significativos. Este trabajo explora nuevos materiales para la computación cuántica más allá de los tradicionales qubits basados en aluminio.

Palabras clave:
Los nanocables InAs están hechos de nanocables InAs.Josephson cruces de las uniones.tiempo de coherencia de tiempo de coherencia.efecto de proximidad efecto de proximidad.híbrido entre superconductor y semiconductor.El transmon qubit es un qubit transmón.El β-Snnn es el

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Área de la Ciencia:

  • La computación cuántica es la computación cuántica.
  • Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada
  • Ciencia de los materiales ciencia de los materiales.

Sus antecedentes:

  • Los qubits superconductores utilizan comúnmente uniones de túneles de óxido de aluminio y aluminio para inductancia no lineal.
  • La exploración de materiales alternativos para la fabricación de qubits es crucial para el avance de las tecnologías cuánticas.

Objetivo del estudio:

  • Para realizar los qubits transmon utilizando nanocables semiconductores InAs recubiertos con capas superconductoras β-Sn.
  • Investigar la sintonizabilidad de la frecuencia del qubit y los tiempos de coherencia en estos nuevos dispositivos.

Principales métodos:

  • Fabricación de qubits transmon con núcleos de nanocables InAs y conchas superconductoras β-Sn.
  • Utilizando la tensión de la puerta para ajustar la energía de Josephson y la frecuencia de qubit.
  • Medir el tiempo de relajación de la energía (T1) y el tiempo de desfase del eco (T2) para evaluar la coherencia.

Principales resultados:

  • Realizó con éxito qubits transmon sintonizables con un rango de frecuencia de 3 GHz.
  • Se logró un tiempo máximo de relajación de la energía (T1) de 27 μs a frecuencias más bajas.
  • Se obtuvo un tiempo máximo de desfase del eco (T2) de 1.8 μs a frecuencias más altas.

Conclusiones:

  • Los qubits superconductores basados en nanocables InAs ofrecen una plataforma prometedora para el procesamiento de información cuántica.
  • Los tiempos de coherencia están influenciados por la frecuencia del qubit, con potencial de mejora a través de una mejor fabricación y diseño de circuitos.