Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Space-Time Curvature and the General Theory of Relativity01:17

Space-Time Curvature and the General Theory of Relativity

3.6K
In 1905, Albert Einstein published his special theory of relativity. According to this theory, no matter in the universe can attain a speed greater than the speed of light in a vacuum, which thus serves as the speed limit of the universe.
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of...
3.6K
The Principle of Superposition and the Gravitational Field01:17

The Principle of Superposition and the Gravitational Field

1.8K
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...
1.8K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

54.6K
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.
54.6K
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

5.7K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
5.7K
Schwarzschild Radius and Event Horizon01:21

Schwarzschild Radius and Event Horizon

2.4K
No object with a finite mass can travel faster than the speed of light in a vacuum. This fact has an interesting consequence in the domain of extremely high gravitational fields.
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape...
2.4K
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

5.2K
The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
5.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same journal

Self-sustained electric field-driven off-grid platform for on-demand microdroplet charging and programmable manipulation.

Reports on progress in physics. Physical Society (Great Britain)·2026
Same journal

Machine-learning-enabled solvent engineering for uniform quantum dot packing in efficient and stable quantum-dot light-emitting diodes.

Reports on progress in physics. Physical Society (Great Britain)·2026
Same journal

El Agente Cuántico: Automating quantum simulations.

Reports on progress in physics. Physical Society (Great Britain)·2026
Same journal

Exploring exotic spin-dependent interactions beyond the Standard Model: theoretical foundations and experimental investigations.

Reports on progress in physics. Physical Society (Great Britain)·2026
Same journal

Probing quark electromagnetic properties via entangled quark pairs in fragmentation hadrons at lepton colliders.

Reports on progress in physics. Physical Society (Great Britain)·2026
Same journal

Review on band structure and spin polarization of altermagnetic materials.

Reports on progress in physics. Physical Society (Great Britain)·2026

Related Experiment Video

Updated: Nov 14, 2025

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

10.0K

A short review of loop quantum gravity.

Abhay Ashtekar1, Eugenio Bianchi1

  • 1Institute for Gravitation & The Cosmos, and Physics Department, Penn State, University Park, PA 16802, United States of America.

Reports on Progress in Physics. Physical Society (Great Britain)
|March 10, 2021
PubMed
Summary

Loop quantum gravity offers a path to unify Einstein's general relativity and quantum physics by treating spacetime geometry as quantum. This approach explores extreme cosmic events like the big bang and black holes.

Keywords:
anomalies in the CMBloop quantum cosmologyloop quantum gravityquantum geometryspinfoams

More Related Videos

Studying DNA Looping by Single-Molecule FRET
11:27

Studying DNA Looping by Single-Molecule FRET

Published on: June 28, 2014

15.7K
The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

22.2K

Related Experiment Videos

Last Updated: Nov 14, 2025

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

10.0K
Studying DNA Looping by Single-Molecule FRET
11:27

Studying DNA Looping by Single-Molecule FRET

Published on: June 28, 2014

15.7K
The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

22.2K

Area of Science:

  • Theoretical Physics
  • Quantum Gravity
  • Cosmology

Background:

  • Unifying general relativity (GR) and quantum mechanics remains a major challenge in fundamental physics.
  • Einstein's theory describes gravity as spacetime geometry, but its smooth continuum breaks down in extreme conditions.

Purpose of the Study:

  • To provide a non-expert overview of Loop Quantum Gravity (LQG).
  • To explain LQG's core concepts and recent advancements.
  • To highlight LQG's potential for understanding the early universe and black holes.

Main Methods:

  • Focuses on the quantum nature of spacetime geometry.
  • Applies principles to extreme regimes like the Big Bang and black hole interiors.
  • Presents a conceptual framework rather than detailed mathematical derivations.

Main Results:

  • LQG reinterprets gravity as a quantum geometric phenomenon.
  • It offers insights into singularity-free cosmology and quantum black hole physics.
  • Recent advances include progress in understanding spacetime discreteness.

Conclusions:

  • Loop Quantum Gravity is a promising framework for a quantum theory of gravity.
  • It provides a unique perspective on the fundamental structure of spacetime.
  • LQG has the potential to resolve major cosmological and astrophysical puzzles.