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Entropy Changes Accompanying Specific Processes

Entropy Changes Accompanying Specific Processes

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Related Experiment Video

Updated: May 27, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Environment-induced sudden transition in quantum discord dynamics.

R Auccaise¹, L C Céleri, D O Soares-Pinto

¹Empresa Brasileira de Pesquisa Agropecuária, Rua Jardim Botânico 1024, 22460-000 Rio de Janeiro, Rio de Janeiro, Brazil.

Physical Review Letters

|November 24, 2011

Summary

Researchers explored quantum discord in a nuclear magnetic resonance setup. They observed sudden changes and noise immunity in quantum correlations, even in separable states, highlighting their importance in quantum information science.

Related Experiment Videos

Last Updated: May 27, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Area of Science:

Quantum Information Science
Quantum Correlation Dynamics

Background:

Nonclassical correlations are vital for quantum information science.
Separable (nonentangled) quantum states can exhibit nonclassical correlations.
Generalized quantum correlations are relevant in quantum communication, computation, phase transitions, and biological systems.

Purpose of the Study:

To demonstrate the sudden-change phenomenon in quantum discord and its classical counterpart.
To investigate the noise resilience of quantum discord in a decohering environment.
To explore quantum correlation dynamics in a room-temperature nuclear magnetic resonance (NMR) system.

Main Methods:

Utilized a room-temperature nuclear magnetic resonance (NMR) setup.
Introduced a decohering environment to simulate noise effects.
Monitored quantum discord and its classical counterpart under decoherence.

Main Results:

Observed the sudden-change phenomenon for both quantum discord and its classical counterpart.
Demonstrated noise immunity for these quantum correlations.
Characterized the impact of a decohering environment, including loss of phase relations and energy exchange.

Conclusions:

Quantum discord and its classical counterpart exhibit sudden changes and noise resilience.
These generalized quantum correlations are robust even in the presence of environmental noise.
The findings have implications for understanding and utilizing quantum correlations in various quantum technologies.