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

Weightlessness01:01

Weightlessness

When an object is dropped, it accelerates toward the center of the Earth. If the net external force on the object is its weight, it is said to be in free fall; that is, the only force acting on the object is gravity. Galileo was instrumental in showing that, in the absence of air resistance, all objects fall with the same acceleration g. However, when objects on the Earth fall downward, they are never truly in free fall, because there is always some upward resistance force from the air acting...
Principle of Equivalence01:18

Principle of Equivalence

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...
What is an Experiment?01:12

What is an Experiment?

An experiment is a planned activity carried out under controlled conditions. The purpose of an experiment is to investigate the relationship between two variables. When one variable causes change in another, we call the first variable the explanatory or independent variable. The affected variable is called the response or dependent variable. In a randomized experiment, the researcher manipulates values of the explanatory variable and measures the resulting changes in the response variable. The...
Controls in Experiments01:13

Controls in Experiments

When conducting an experiment, it is crucial to have control to reduce bias and accurately measure the dependent variables. It also marks the results more reliable. Controls are elements in an experiment that have the same characteristics as the treatment groups but are not affected by the independent variable. By sorting these data into control and experimental conditions, the relationship between the dependent and independent variables can be drawn. A randomized experiment always includes a...
Comparing Experimental Results: Student's t-Test01:09

Comparing Experimental Results: Student's t-Test

The t-test is a statistical method used to compare the sample mean with a population mean or compare two means from two data sets. The test statistic is calculated from the standard deviation, mean, and number of measurements in the data set at a selected confidence interval and then compared to a table of critical values at this confidence level. If the test statistic is smaller than the critical value, the null hypothesis is accepted. In this case, we state that the difference between the...
The Joule and Joule–Thomson Experiments01:23

The Joule and Joule–Thomson Experiments

Consider an adiabatic system composed of two chambers, A and B, designed such that no heat flows into or out of the system. Initially, chamber A is filled with a gas at a fixed temperature T1, pressure p1, and volume V1, while chamber B is evacuated. The gas is then gradually forced through a rigid, porous barrier to chamber B, ultimately reaching temperature T2, pressure p2, and volume V2. A piston on the right side maintains a constant pressure (p2), which is lower than p1. The significant...

You might also read

Related Articles

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

Sort by
Same author

Hiding Ignorance Using High Dimensions.

Physical review letters·2020
Same author

Optimal Imaging of Remote Bodies Using Quantum Detectors.

Physical review letters·2019
Same author

High-efficiency single-photon generation via large-scale active time multiplexing.

Science advances·2019
Same author

Quantum Hypercube States.

Physical review letters·2019
Same author

Indefinite Causal Order in a Quantum Switch.

Physical review letters·2018
Same author

Boson Sampling with Single-Photon Fock States from a Bright Solid-State Source.

Physical review letters·2017

Related Experiment Video

Updated: Jul 10, 2026

Development of an Experimental Setup for the Measurement of the Coefficient of Restitution under Vacuum Conditions
07:49

Development of an Experimental Setup for the Measurement of the Coefficient of Restitution under Vacuum Conditions

Published on: March 29, 2016

Experimental verification of decoherence-free subspaces.

P G Kwiat1, A J Berglund, J B Altepeter

  • 1Physics Division, P-23, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. kwiat@lanl.gov

Science (New York, N.Y.)
|October 20, 2000
PubMed
Summary

Researchers created entangled photons and found a specific quantum state resistant to decoherence. This discovery is crucial for advancing quantum computation and information processing technologies.

More Related Videos

Safe Experimentation in Optical Levitation of Charged Droplets Using Remote Labs
09:09

Safe Experimentation in Optical Levitation of Charged Droplets Using Remote Labs

Published on: January 10, 2019

A Virtual Simulation Experiment of Mechanics: Material Deformation and Failure Based on Scanning Electron Microscopy
06:54

A Virtual Simulation Experiment of Mechanics: Material Deformation and Failure Based on Scanning Electron Microscopy

Published on: January 20, 2023

Related Experiment Videos

Last Updated: Jul 10, 2026

Development of an Experimental Setup for the Measurement of the Coefficient of Restitution under Vacuum Conditions
07:49

Development of an Experimental Setup for the Measurement of the Coefficient of Restitution under Vacuum Conditions

Published on: March 29, 2016

Safe Experimentation in Optical Levitation of Charged Droplets Using Remote Labs
09:09

Safe Experimentation in Optical Levitation of Charged Droplets Using Remote Labs

Published on: January 10, 2019

A Virtual Simulation Experiment of Mechanics: Material Deformation and Failure Based on Scanning Electron Microscopy
06:54

A Virtual Simulation Experiment of Mechanics: Material Deformation and Failure Based on Scanning Electron Microscopy

Published on: January 20, 2023

Area of Science:

  • Quantum physics
  • Quantum information science

Background:

  • Entangled quantum states are fundamental to quantum information processing.
  • Decoherence poses a significant challenge to maintaining quantum states.

Purpose of the Study:

  • To produce and characterize polarization-entangled two-photon states.
  • To investigate the effects of controllable decoherence on these entangled states.
  • To identify decoherence-free entangled states.

Main Methods:

  • Spontaneous parametric down-conversion (SPDC) was used to generate entangled photon pairs.
  • Two-photon tomography was employed to measure the density matrix of the photon states.
  • Adjustable birefringent elements were used to introduce controlled decoherence.

Main Results:

  • Characterization of polarization-entangled two-photon states was achieved.
  • Controllable decoherence was successfully imposed on the entangled states.
  • A specific entangled state was observed to be immune to collective decoherence, aligning with theoretical predictions.

Conclusions:

  • The existence of decoherence-free entangled states was experimentally confirmed.
  • These findings highlight the potential of decoherence-free states for robust quantum computation.
  • The research paves the way for more stable quantum information processing systems.