Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Entropy02:39

Entropy

32.6K
Salt particles that have dissolved in water never spontaneously come back together in solution to reform solid particles. Moreover, a gas that has expanded in a vacuum remains dispersed and never spontaneously reassembles. The unidirectional nature of these phenomena is the result of a thermodynamic state function called entropy (S). Entropy is the measure of the extent to which the energy is dispersed throughout a system, or in other words, it is proportional to the degree of disorder of a...
32.6K
Entropy Change in Reversible Processes01:10

Entropy Change in Reversible Processes

2.9K
In the Carnot engine, which achieves the maximum efficiency between two reservoirs of fixed temperatures, the total change in entropy is zero. The observation can be generalized by considering any reversible cyclic process consisting of many Carnot cycles. Thus, it can be stated that the total entropy change of any ideal reversible cycle is zero.
The statement can be further generalized to prove that entropy is a state function. Take a cyclic process between any two points on a p-V diagram.
2.9K
The de Broglie Wavelength02:32

The de Broglie Wavelength

31.3K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
31.3K
Entropy and the Second Law of Thermodynamics01:20

Entropy and the Second Law of Thermodynamics

3.5K
The second law of thermodynamics can be stated quantitatively using the concept of entropy. Entropy is the measure of disorder of the system.
The relation  between entropy and disorder can be illustrated with the example of the phase change of ice to water. In ice, the molecules are located at specific sites giving a solid state, whereas, in a liquid form, these molecules are much freer to move. The molecular arrangement has therefore become more randomized. Although the change in average...
3.5K
Second Law of Thermodynamics02:49

Second Law of Thermodynamics

25.3K
In the quest to identify a property that may reliably predict the spontaneity of a process, a promising candidate has been identified: entropy. Processes that involve an increase in entropy of the system (ΔS > 0) are very often spontaneous; however, examples to the contrary are plentiful. By expanding consideration of entropy changes to include the surroundings, a significant conclusion regarding the relation between this property and spontaneity may be reached. In thermodynamic models, the...
25.3K
Transmission Electron Microscopy01:15

Transmission Electron Microscopy

6.3K
In 1931, physicist Ernst Ruska—building on the idea that magnetic fields can direct an electron beam just as lenses can direct a beam of light in an optical microscope—developed the first prototype of the electron microscope. This development led to the development of the field of electron microscopy. In the transmission electron microscope (TEM), electrons are produced by a hot tungsten element and accelerated by a potential difference in an electron gun, which gives them up to 400...
6.3K

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Localized quasiparticles in a fluxonium with quasi-two-dimensional amorphous kinetic inductors.

Nature communications·2026
Same author

Traceable random numbers from a non-local quantum advantage.

Nature·2025
Same author

Sleeve gastrectomy reveals the plasticity of the human gastric epithelium.

Nature communications·2025
Same author

Signatures of a spin-active interface and a locally enhanced Zeeman field in a superconductor-chiral material heterostructure.

Science advances·2024
Same author

Measurement of electric-field noise from interchangeable samples with a trapped-ion sensor.

Physical review. A·2024
Same author

An atomic boson sampler.

Nature·2024

Video Experimental Relacionado

Updated: Nov 6, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

8.7K

Observación directa del entrelazamiento macroscópico determinista

Shlomi Kotler1,2, Gabriel A Peterson3,2, Ezad Shojaee3,2

  • 1National Institute of Standards and Technology, Boulder, CO 80305, USA. shlomi.kotler@mail.huji.ac.il.

Science (New York, N.Y.)
|May 7, 2021
PubMed
Resumen

Los investigadores lograron el entrelazamiento cuántico entre dos cabezas de tambor mecánicas macroscópicas. Este avance en la mecánica cuántica permite nuevas posibilidades para la detección y las redes cuánticas.

Más Videos Relacionados

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

8.7K
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

14.8K

Videos de Experimentos Relacionados

Last Updated: Nov 6, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

8.7K
An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

8.7K
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

14.8K

Área de la Ciencia:

  • La mecánica cuántica
  • Fenómenos cuánticos macroscópicos
  • Optomecánica

Sus antecedentes:

  • El entrelazamiento cuántico es un fenómeno donde las partículas exhiben un comportamiento correlacionado, independientemente de la distancia.
  • Observar el entrelazamiento en sistemas macroscópicos es un desafío debido al aumento de la masa y los estrictos requisitos de medición.

Objetivo del estudio:

  • Para enredar de manera determinista dos sistemas mecánicos macroscópicos.
  • Para demostrar el entrelazamiento cuántico en micro objetos con masa significativa.

Principales métodos:

  • Utilizó electromecánica pulsada para el control y la medición precisos.
  • Realizó mediciones casi cuánticas de las cuadraturas de posición e impulso.
  • Empleado tomografía de estado cuántico para verificar el entrelazamiento.

Principales resultados:

  • Se logró con éxito el entrelazamiento cuántico entre dos cabezas de tambor mecánicas de 70 picogramos.
  • Enredo observado directamente a través de la tomografía de estado cuántico.
  • Control demostrado sobre los sistemas mecánicos macroscópicos en el nivel cuántico.

Conclusiones:

  • Los sistemas macroscópicos entrelazados abren nuevas vías para las pruebas fundamentales de la mecánica cuántica.
  • Estos sistemas pueden mejorar las capacidades de detección más allá del límite cuántico estándar.
  • Son adecuados para su uso como nodos robustos en futuras redes cuánticas.