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

3.4K
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...
3.4K
Principle of Equivalence01:18

Principle of Equivalence

2.3K
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...
2.3K
The de Broglie Wavelength02:32

The de Broglie Wavelength

30.9K
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...
30.9K
The Uncertainty Principle04:08

The Uncertainty Principle

29.2K
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...
29.2K
Electromagnetic Waves in Matter01:30

Electromagnetic Waves in Matter

3.5K
Electromagnetic waves can travel in the vacuum as well as in matter. For example light, which is an electromagnetic wave, can travel through air, water, or glass.
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the...
3.5K
Difference from Background: Limit of Detection01:05

Difference from Background: Limit of Detection

7.5K
The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
7.5K

You might also read

Related Articles

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

Sort by
Same author

Quantum Gravitational Force Between Polarizable Objects.

Physical review letters·2016
Same author

Oscillons after inflation.

Physical review letters·2012
Same author

Some calculable contributions to entanglement entropy.

Physical review letters·2011
See all related articles

Related Experiment Video

Updated: Oct 26, 2025

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

9.3K

General Relativistic Decoherence with Applications to Dark Matter Detection.

Itamar J Allali1, Mark P Hertzberg1

  • 1Institute of Cosmology, Department of Physics and Astronomy, Tufts University, Medford, Massachusetts 02155, USA.

Physical Review Letters
|July 30, 2021
PubMed
Summary

Dark matter (DM) interactions may preserve quantum states from decoherence. Quantum general relativity shows axion DM phase superpositions in the Milky Way are robust, unlike spatial superpositions, impacting detection experiments.

More Related Videos

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

22.1K
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

Related Experiment Videos

Last Updated: Oct 26, 2025

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

9.3K
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

22.1K
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

Area of Science:

  • Quantum Physics
  • Cosmology
  • General Relativity

Background:

  • Macroscopic quantum superpositions are fragile due to environmental interactions causing decoherence.
  • Gravitational interactions, like those of dark matter (DM), may offer a pathway to reduced decoherence.

Purpose of the Study:

  • To compute the decoherence rate of a quantum object interacting solely via gravity.
  • To investigate quantum general relativistic effects on superposed metric oscillations.
  • To analyze the decoherence of axion dark matter in different superposition states.

Main Methods:

  • Quantum mechanics
  • General relativity
  • Decoherence rate computation
  • Analysis of superposed metric oscillations
  • Axion dark matter phase and spatial superpositions

Main Results:

  • Decoherence is significantly slowed for systems interacting only gravitationally.
  • Axion dark matter in a phase superposition within the Milky Way is robust against decoherence.
  • Spatial superpositions of axion dark matter are not robust against decoherence.

Conclusions:

  • Quantum effects in general relativity are computable and relevant for dark matter.
  • The phase coherence of Milky Way dark matter suggests potential for novel direct detection strategies.
  • Spatial decoherence challenges certain dark matter detection models.