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

Principle of Equivalence01:18

Principle of Equivalence

2.2K
According to Albert Einstein (1897-1955), free-falling and feeling weightless are intrinsically linked. If a person were in free-fall under gravity, for example, diving towards the Earth from an airplane, they would feel completely weightless. Similarly, a person descending in a lift may feel partially weightless. Broadly speaking, it is assumed that an object in a uniform gravitational field and an object undergoing constant acceleration in the absence of gravity are under the same...
2.2K
Space-Time Curvature and the General Theory of Relativity01:17

Space-Time Curvature and the General Theory of Relativity

2.9K
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...
2.9K
Gravitation Between Spherically Symmetric Masses01:14

Gravitation Between Spherically Symmetric Masses

958
The gravitational potential energy between two spherically symmetric bodies can be calculated from the masses and the distance between the bodies, assuming that the center of mass is concentrated at the respective centers of the bodies.
958
The Principle of Superposition and the Gravitational Field01:17

The Principle of Superposition and the Gravitational Field

1.4K
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...
1.4K
Potential Energy due to Gravitation01:27

Potential Energy due to Gravitation

5.6K
Since gravitational force is a conservative force, the amount of work done to move an object between two points in the gravitational field in which it resides is independent of the path taken. Thus, similar to the gravitational field, a gravitational potential energy function can be defined, which depends only on spatial coordinates.
Consider a mass gravitationally bound to another object. For example, the Earth is gravitationally bound to the Sun’s gravitational field. The potential...
5.6K
Gravitation01:16

Gravitation

6.6K
In the years before Newton, a general belief prevailed that different laws governed objects in the sky than objects on Earth. When Kepler wrote down the three laws of planetary motion, explaining in detail the geometrical properties of the planetary orbits around the Sun, there was no immediate idea to discern their connection with more fundamental laws. It was Isaac Newton who, in 1665–66, figured out the connection between planetary motion, the motion of the moon around the Earth, and...
6.6K

You might also read

Related Articles

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

Sort by
Same author

Acute respiratory distress and hemoptysis: a case report of drug-induced lung injury aka "crack lung".

AME case reports·2025
Same author

A 91-Year-Old Female with Recurring Coma Due to Atypical Hyperammonemia.

Reports (MDPI)·2025
Same author

Line of Fixed Points in Gross-Neveu Theories.

Physical review letters·2023
Same author

Monte Carlo sampling of complex actions in extended state spaces.

Physical review. E·2022
Same author

Discrete Langevin machine: Bridging the gap between thermodynamic and neuromorphic systems.

Physical review. E·2020
Same author

Price of Asymptotic Safety.

Physical review letters·2019

Related Experiment Video

Updated: Aug 7, 2025

Demonstrating the Uses of the Novel Gravitational Force Spectrometer to Stretch and Measure Fibrous Proteins
13:51

Demonstrating the Uses of the Novel Gravitational Force Spectrometer to Stretch and Measure Fibrous Proteins

Published on: March 19, 2011

10.4K

Lorentzian Quantum Gravity and the Graviton Spectral Function.

Jannik Fehre1, Daniel F Litim2, Jan M Pawlowski1,3

  • 1Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany.

Physical Review Letters
|March 10, 2023
PubMed
Summary
This summary is machine-generated.

Researchers computed the graviton spectral function in quantum gravity using a novel renormalization group approach. The study reveals a positive spectral function with a massless graviton peak and a multigraviton continuum, indicating asymptotic safety.

More Related Videos

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

9.7K
Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
08:04

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

Published on: May 27, 2020

8.5K

Related Experiment Videos

Last Updated: Aug 7, 2025

Demonstrating the Uses of the Novel Gravitational Force Spectrometer to Stretch and Measure Fibrous Proteins
13:51

Demonstrating the Uses of the Novel Gravitational Force Spectrometer to Stretch and Measure Fibrous Proteins

Published on: March 19, 2011

10.4K
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

9.7K
Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
08:04

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

Published on: May 27, 2020

8.5K

Area of Science:

  • Theoretical Physics
  • Quantum Gravity
  • High Energy Physics

Background:

  • Quantum gravity remains a significant challenge in theoretical physics, lacking a complete, nonperturbative description.
  • Understanding the behavior of gravitons, the hypothetical quantum particles of gravity, is crucial for a unified theory.

Purpose of the Study:

  • To perform the first direct and nonperturbative computation of the graviton spectral function.
  • To explore the implications of asymptotic safety in quantum gravity.
  • To investigate the influence of a cosmological constant on gravitational properties.

Main Methods:

  • Utilized a novel Lorentzian renormalization group approach.
  • Employed a spectral representation of correlation functions for direct computation.
  • Incorporated a cosmological constant into the theoretical framework.

Main Results:

  • Successfully computed a positive graviton spectral function.
  • Identified a massless one-graviton peak and a multigraviton continuum.
  • Observed an asymptotically safe scaling for large spectral values.
  • Analyzed the impact of a cosmological constant on the spectral function.

Conclusions:

  • The findings support the existence of asymptotic safety in quantum gravity.
  • The computed spectral function provides insights into the quantum nature of gravity.
  • Further research into scattering processes and unitarity is warranted.