Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Quantum Numbers

Quantum Numbers

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.

Classifying Matter by State

Classifying Matter by State

Chemistry is the study of matter and the changes it undergoes. Matter is anything that has mass and occupies space. Matter is all around us; the air, water, soil, mountains, even our bodies are all examples of matter. Matter is divided into three states — solid, liquid, and gas — that are commonly found on earth. The fourth state of matter, plasma, occurs naturally in the interiors of stars.

Center of Gravity

Center of Gravity

The center of gravity (COG) of an object is the point where the object's total weight is considered to be concentrated. Knowing the location of the center of gravity is useful when predicting the behavior of a moving object or designing static structures. In a uniform gravitational field, the center of gravity is similar to the center of mass (COM); yet, these two points can be positioned differently. For example, the Moon's center of mass lies very close to its geometric center, but...

Responses to Gravity and Touch

Responses to Gravity and Touch

Gravitropism: Plant Responses to Gravity

The Quantum-Mechanical Model of an Atom

The Quantum-Mechanical Model of an Atom

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.

Classifying Matter by Composition

Classifying Matter by Composition

Matter: Pure Substances and Mixtures
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures.
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated.
A mixture is composed of two or...

You might also read

Related Articles

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

Sort by

Same author

The Black Hole Information Problem.

Entropy (Basel, Switzerland)·2025

Same author

Quo Vadis Particula Physica?

Entropy (Basel, Switzerland)·2024

Same author

Quantum Hair from Gravity.

Physical review letters·2022

Same author

Non-minimal Coupling of the Higgs Boson to Curvature in an Inflationary Universe.

Foundations of physics·2020

Same author

Cosmological evolution of the Higgs boson's vacuum expectation value.

The European physical journal. C, Particles and fields·2020

Same author

Gravitational radiation in quantum gravity.

The European physical journal. C, Particles and fields·2019

Same journal

Quantitative understanding of PDF fits and their uncertainties.

The European physical journal. C, Particles and fields·2026

Same journal

Probing the Higgs portal to a strongly-interacting dark sector at the FCC-ee.

The European physical journal. C, Particles and fields·2026

Same journal

Quantifying vacuum-like jets in heavy-ion collisions: a machine learning study.

The European physical journal. C, Particles and fields·2026

Same journal

High-energy decays and weak quantum measurements.

The European physical journal. C, Particles and fields·2026

Same journal

Combined effective field theory interpretation of Higgs boson, electroweak vector boson, top quark, and multijet measurements.

The European physical journal. C, Particles and fields·2026

Same journal

A journey to ITACA: Ion Tracking with Ammonium Cations Apparatus.

The European physical journal. C, Particles and fields·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Jan 26, 2026

Production and Targeting of Monovalent Quantum Dots

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

Dark matter in quantum gravity.

Xavier Calmet^1,2, Boris Latosh^1,3

¹1Department of Physics and Astronomy, University of Sussex, Brighton, BN1 9QH UK.

The European Physical Journal. C, Particles and Fields

|April 9, 2019

Summary

This summary is machine-generated.

Quantum gravity theories may explain dark matter. The theory predicts two massive fields that, if long-lived, could constitute this mysterious substance, interacting only via gravity.

More Related Videos

Gradient Echo Quantum Memory in Warm Atomic Vapor

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch

Published on: February 7, 2022

Related Experiment Videos

Last Updated: Jan 26, 2026

Production and Targeting of Monovalent Quantum Dots

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

Gradient Echo Quantum Memory in Warm Atomic Vapor

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch

Published on: February 7, 2022

Area of Science:

Theoretical physics
Cosmology
Particle physics

Background:

The nature of dark matter remains one of the most significant unsolved problems in modern physics.
Current models suggest dark matter comprises approximately 85% of the universe's matter content.
Existing dark matter candidates have not been definitively detected, necessitating alternative explanations.

Purpose of the Study:

To investigate the potential of quantum gravity as a source for dark matter.
To explore the particle content of quantum gravity beyond the known massless gravitational field.
To determine if these predicted particles could fulfill the role of dark matter.

Main Methods:

Analysis of the theoretical spectrum of quantum gravity, considering its ultra-violet completion.
Identification of massive fields within the quantum gravity framework.
Assessment of the properties (mass, spin, lifetime, interactions) of these hypothetical fields.

Main Results:

Quantum gravity, irrespective of its specific ultra-violet completion, predicts the existence of two massive fields: one spin 2 and one spin 0.
These massive fields are naturally present in the spectrum of quantum gravity.
If these fields possess sufficiently long lifetimes, they are viable candidates for dark matter.

Conclusions:

Dark matter could be composed of massive, long-lived fields predicted by quantum gravity.
Such dark matter would be very light and interact with the Standard Model only through gravity.
This provides a novel theoretical framework for understanding dark matter's origin and properties.