Video Experimental Relacionado
Updated: Feb 3, 2026

06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
9.7K
Control cuántico del movimiento mecánico basado en mediciones
Massimiliano Rossi1,2, David Mason1,2, Junxin Chen1,2
1Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark.
Nature
|November 2, 2018
Resumen
Los investigadores lograron el control cuántico basado en mediciones de un resonador de membrana
Área de la Ciencia:
- La mecánica cuántica
- Optomecánica
- El control cuántico
Sus antecedentes:
- El control del sistema cuántico se ve obstaculizado por la retroacción de la medición.
- La medición eficiente equilibra la ganancia de información y la perturbación.
- La retroalimentación en tiempo real puede mitigar la retroacción y controlar los estados cuánticos.
Objetivo del estudio:
- Para demostrar el control cuántico basado en mediciones para grados de libertad de movimiento.
- Aplicar técnicas de control cuántico a un resonador de membrana de tamaño milimétrico.
Principales métodos:
- Utilizó un transductor optomecánico para medir el movimiento del resonador.
- Se obtiene una alta eficiencia de medición cercana a la unidad.
- Empleado un bucle de retroalimentación electrónico para la aplicación de fuerza en tiempo real.
Principales resultados:
- Se enfrió el resonador de membrana a su estado fundamental cuántico (0,29 ocupación térmica).
- Se logró un enfriamiento de nueve decibelios por debajo del límite de retroacción cuántica.
- Reducción de la ocupación térmica en seis órdenes de magnitud en comparación con el medio ambiente.
Conclusiones:
- Se ha demostrado con éxito el control cuántico del movimiento basado en mediciones.
- Control cuántico extendido a los grados de libertad de posición e impulso.
- Se abrieron posibilidades para el procesamiento de información cuántica y la detección de ondas gravitacionales.
Videos de Conceptos Relacionados
The Quantum-Mechanical Model of an Atom
57.3K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
57.3K
Quantum Numbers
50.1K
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
50.1K
Mechanism of Ciliary Motion
5.2K
The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
5.2K
Equation of Motion: General Plane motion
581
In the context of a rigid body's movement within a general plane, it is important to understand that this motion is typically triggered by external forces or couple moments exerted onto it. This principle can be explained through Newton's second law, which stipulates the translational motion of the body's center of mass along each axis.
Moreover, the body's center of mass experiences a rotational effect as a result of these couple moments. This rotation can be articulated as the...
Moreover, the body's center of mass experiences a rotational effect as a result of these couple moments. This rotation can be articulated as the...
581
Absolute Motion Analysis- General Plane Motion
565
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
565
Equation of Motion: General Plane motion - Problem Solving
505
Consider a lawn roller with a mass of 100 kg, a radius of 0.2 meters, and a radius of gyration of 0.15 meters. A force of 200 N is applied to this roller, angled at 60 degrees from the horizontal plane. What will be the angular acceleration of the lawn roller?
The friction between the roller and the ground is characterized by two coefficients. The static friction coefficient is 0.15, while the kinetic friction coefficient is 0.1. These values are crucial in understanding the interaction between...
The friction between the roller and the ground is characterized by two coefficients. The static friction coefficient is 0.15, while the kinetic friction coefficient is 0.1. These values are crucial in understanding the interaction between...
505

