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

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

Space-Time Curvature and the General Theory of Relativity

3.7K
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...
3.7K
Detection of Black Holes01:10

Detection of Black Holes

2.4K
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
2.4K
The Uncertainty Principle04:08

The Uncertainty Principle

30.2K
Werner Heisenberg considered the limits of how accurately one can measure properties of an electron or other microscopic particles. He determined that there is a fundamental limit to how accurately one can measure both a particle’s position and its momentum simultaneously. The more accurate the measurement of the momentum of a particle is known, the less accurate the position at that time is known and vice versa. This is what is now called the Heisenberg uncertainty principle. He...
30.2K
Entropy02:39

Entropy

33.6K
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...
33.6K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

55.1K
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.
55.1K

You might also read

Related Articles

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

Sort by
Same author

Quantum Gravity Spacetime: Universe vs. Multiverse.

Entropy (Basel, Switzerland)·2025
Same author

The Dynamical Evolution Parameter in Manifestly Covariant Quantum Gravity Theory.

Entropy (Basel, Switzerland)·2025
Same author

Unconstrained Lagrangian Variational Principles for the Einstein Field Equations.

Entropy (Basel, Switzerland)·2023
Same author

Physical Properties of Schwarzschild-deSitter Event Horizon Induced by Stochastic Quantum Gravity.

Entropy (Basel, Switzerland)·2021
Same author

The Quantum Regularization of Singular Black-Hole Solutions in Covariant Quantum Gravity.

Entropy (Basel, Switzerland)·2021
Same author

The Principle of Covariance and the Hamiltonian Formulation of General Relativity.

Entropy (Basel, Switzerland)·2021

Related Experiment Video

Updated: Nov 27, 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

Quantum-Gravity Stochastic Effects on the de Sitter Event Horizon.

Claudio Cremaschini1, Massimo Tessarotto1,2

  • 1Research Center for Theoretical Physics and Astrophysics, Institute of Physics, Silesian University in Opava, Bezručovo nám.13, CZ-74601 Opava, Czech Republic.

Entropy (Basel, Switzerland)
|December 8, 2020
PubMed
Summary

The stochastic nature of the cosmological constant is revealed through quantum gravity interactions. This leads to a de Sitter universe solution and calculations of Hawking temperature and event horizon radius.

Keywords:
Hawking temperaturecosmological constantcovariant quantum gravityde Sitter space-timeevent horizonstochastic effects

More Related Videos

Setting Limits on Supersymmetry Using Simplified Models
07:46

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

8.8K
Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method
05:51

Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method

Published on: July 19, 2019

6.5K

Related Experiment Videos

Last Updated: Nov 27, 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
Setting Limits on Supersymmetry Using Simplified Models
07:46

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

8.8K
Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method
05:51

Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method

Published on: July 19, 2019

6.5K

Area of Science:

  • Theoretical Physics
  • Cosmology
  • Quantum Gravity

Background:

  • The cosmological constant's origin and behavior remain key questions in cosmology.
  • Quantum gravity theories aim to unify gravity with quantum mechanics.
  • Recent advancements in covariant theory of quantum gravity (CQG theory) offer new frameworks.

Purpose of the Study:

  • To investigate the stochastic nature of the cosmological constant within CQG theory.
  • To explore the consistency of this stochasticity with axiomatic quantum gravity formulations.
  • To derive quantum-modified Einstein field equations and analyze their cosmological implications.

Main Methods:

  • Analysis of non-linear quantum-vacuum Bohm interactions.
  • Utilizing the hydrodynamic representation of CQG theory.
  • Investigating indeterminacy properties of probability density functions.
  • Deriving stochastic quantum-modified Einstein field equations.

Main Results:

  • The stochastic character of the cosmological constant is demonstrated.
  • A consistency is shown between stochasticity and axiomatic quantum gravity.
  • A stochastic cosmological de Sitter solution for spacetime is obtained.
  • Analytical calculations of stochastic averages for physical observables, including Hawking temperature and event horizon radius, are presented.

Conclusions:

  • The study provides a novel perspective on the cosmological constant's stochastic nature.
  • The findings support the validity of the hydrodynamic representation of CQG theory.
  • The results have significant theoretical implications for cosmology and quantum field theories.