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.

The Pauli Exclusion Principle

The Pauli Exclusion Principle

The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:

First Law: Particles in One-dimensional Equilibrium

First Law: Particles in One-dimensional Equilibrium

Newton's first law of motion states that a body at rest remains at rest, or if in motion, remains in motion at constant velocity, unless acted on by a net external force. It also states that there must be a cause for any change in velocity (a change in either magnitude or direction) to occur. This cause is a net external force. For example, consider what happens to an object sliding along a rough horizontal surface. The object quickly grinds to a halt, due to the net force of friction. If...

Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule

Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule

In the AX proton spin system, proton A can sense the two spin states of a coupled proton X, resulting in a doublet NMR signal with two peaks of equal (1:1) intensity. When proton A is coupled to two equivalent protons (AX2 spin system), the spin states of each X can be aligned with or against the external field, creating three possible scenarios. This results in a 1:2:1 triplet signal, where the central peak corresponds to the chemical shift of A and is twice as large or intense as the...

First Law: Particles in Two-dimensional Equilibrium

First Law: Particles in Two-dimensional Equilibrium

Recall that a particle in equilibrium is one for which the external forces are balanced. Static equilibrium involves objects at rest, and dynamic equilibrium involves objects in motion without acceleration; but it is important to remember that these conditions are relative. For instance, an object may be at rest when viewed from one frame of reference, but that same object would appear to be in motion when viewed by someone moving at a constant velocity.
Newton's first law tells us about...

The Uncertainty Principle

The Uncertainty Principle

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...

You might also read

Related Articles

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

Sort by

Same author

From Nash Equilibrium to Social Optimum and Back: A Mean Field Perspective.

Applied mathematics and optimization·2026

Same author

Femtosecond coherence dynamics of exciton-polaritons.

National science review·2026

Same author

Magic Monotone for Faithful Detection of Nonstabilizerness in Mixed States.

Physical review letters·2025

Same author

Experimental determination of tripartite quantum discord.

Proceedings of the National Academy of Sciences of the United States of America·2025

Same author

Rényi relative entropy based monogamy of entanglement in tripartite systems.

Scientific reports·2025

Same author

A large-scale single-mode array laser based on a topological edge mode.

Nanophotonics (Berlin, Germany)·2024

Search research articles

Related Experiment Video

Updated: Dec 25, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Multipartite Generalization of Quantum Discord.

Chandrashekar Radhakrishnan^1,2,3, Mathieu Laurière^1,4, Tim Byrnes^1,2,5,6,7

¹New York University Shanghai, 1555 Century Avenue, Pudong, Shanghai 200122, China.

Physical Review Letters

|April 4, 2020

Summary

This summary is machine-generated.

Researchers propose a new measure for multipartite quantum discord, consistent with bipartite systems. This quantity quantifies nonclassical correlations and decomposes for tripartite systems, revealing bipartite correlations and monogamy effects.

More Related Videos

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Related Experiment Videos

Last Updated: Dec 25, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Area of Science:

Quantum Information Theory
Quantum Many-Body Systems
Quantum Correlations

Background:

Quantum discord quantifies nonclassical correlations in quantum systems.
Existing measures are primarily defined for bipartite (two-party) systems.
Generalizing quantum discord to multipartite systems is crucial for understanding complex quantum phenomena.

Purpose of the Study:

To propose a general definition of quantum discord for multipartite quantum systems.
To ensure the proposed measure is consistent with the established bipartite definition.
To provide a tool for quantifying total nonclassical correlations in multipartite systems.

Main Methods:

Formulation of a generalized quantum discord applicable to systems with more than two subsystems.
Analysis of the properties of the proposed measure, including non-negativity and vanishing for classically correlated states.
Decomposition of the multipartite discord for the tripartite case using conditional mutual information and tripartite mutual information.

Main Results:

A novel generalization of quantum discord for multipartite systems is introduced.
The proposed measure is non-negative and equals zero only for classically correlated subsystems.
For tripartite systems, discord decomposes into bipartite nonclassical correlations and a term related to the monogamy of correlations.

Conclusions:

The proposed multipartite quantum discord offers a consistent and meaningful measure of nonclassical correlations.
The decomposition provides insights into the structure of correlations in multipartite quantum states.
This work advances the understanding of quantum correlations beyond the bipartite regime.