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An object undergoing circular motion, like a race car, is accelerating because it is changing the direction of its velocity. This centrally directed acceleration is called centripetal acceleration. This acceleration acts along the radius of the curved path (thus is also referred to as radial acceleration).
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The principle of superposition applies to gravitational forces of objects that are sufficiently far apart. It states that the net gravitational force on a point object is the vector sum of the gravitational forces on it due to various objects. The principle helps calculate the force by listing the individual forces and then vectorially summing them up. However, it should be noted that the principle of superposition is not always apparent. In the presence of a second force, the first force could...
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Las firmas espaciotemporales giratorias de un vórtice cuántico gigante

Patrik Švančara1,2, Pietro Smaniotto3,4, Leonardo Solidoro3,4

  • 1School of Mathematical Sciences, University of Nottingham, Nottingham, UK. patrik.svancara@nottingham.ac.uk.

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Los investigadores estabilizaron un vórtice cuántico gigante en el helio superfluido, superando los problemas de inestabilidad. Este avance en la teoría cuántica de simulaciones de espacio-tiempo curvo y agujeros negros analógicos.

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Área de la Ciencia:

  • Física de la materia condensada
  • Teoría del campo cuántico
  • Astrofísica de laboratorio

Sus antecedentes:

  • Los simuladores de gravedad usan superfluidos para imitar los fenómenos curvos del espacio-tiempo.
  • Los sistemas superfluidos son cruciales para verificar la teoría cuántica del campo en el espacio-tiempo curvo.
  • La simulación de agujeros negros giratorios requiere un flujo de vórtice extenso en superfluidos.

Objetivo del estudio:

  • Para estabilizar un vórtice cuántico gigante estacionario en el superfluido 4He.
  • Para superar la inestabilidad inherente de los vórtices multiplicados.
  • Desarrollar un método para caracterizar el flujo de vórtice en sistemas superfluidos.

Principales métodos:

  • Estabilización de un vórtice cuántico gigante en el superfluido 4He.
  • Caracterización del flujo de vórtice utilizando ondas de superficie a escala micrométrica.
  • Observación de las interacciones onda-vórtice, incluidos los estados de enlace y las firmas de anillo.

Principales resultados:

  • Un vórtice cuántico gigante estacionario con miles de cuantos de circulación fue estabilizado.
  • El núcleo del vórtice es compacto, superando las limitaciones de otros sistemas físicos.
  • Se observaron firmas analógicas de anillo de agujero negro y estados unidos.

Conclusiones:

  • El helio superfluido puede usarse para simular el espacio-tiempo curvo giratorio.
  • Este trabajo abre nuevas vías para explorar las transiciones de vórtice cuántico a clásico.
  • El vórtice estabilizado hace avanzar el uso de superfluidos como simuladores de la teoría cuántica de campos.