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Updated: Aug 30, 2025
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Thermodynamic Signatures of Genuinely Multipartite Entanglement.
Samgeeth Puliyil1, Manik Banik2, Mir Alimuddin1,2
1School of Physics, IISER Thiruvananthapuram, Vithura, Kerala 695551, India.
Physical Review Letters
|August 26, 2022
Summary
We introduce new thermodynamic measures, based on quantum battery energy (ergotropies), to detect genuine multipartite entanglement. These quantities offer a novel way to classify and quantify complex quantum entanglement in many-body systems.
Area of Science:
- Quantum Information Theory
- Quantum Thermodynamics
- Many-Body Quantum Physics
Background:
- Bipartite entanglement theory shows strong parallels with thermodynamics.
- Multipartite quantum systems exhibit diverse entanglement forms, with genuine entanglement being the most complex.
Purpose of the Study:
- To extend the entanglement-thermodynamics connection to multipartite quantum systems.
- To propose novel thermodynamic quantities for detecting genuine multipartite entanglement.
- To establish energy-based measures (ergotropies) as indicators of entanglement genuineness.
Main Methods:
- Defining thermodynamic quantities based on the difference between global and local extractable work (ergotropies).
- Utilizing quantum batteries to store and measure extractable work.
- Comparing proposed ergotropy-based measures with existing genuine entanglement quantifiers.
Main Results:
- Proposed ergotropy-based quantities serve as faithful measures of genuine multipartite entanglement.
- These measures can distinguish between different classes of genuinely entangled states.
- The approach generalizes to quantify k-nonseparability, characterizing diverse entanglement manifestations.
Conclusions:
- Thermodynamic quantities, specifically ergotropies, provide a powerful tool for characterizing genuine multipartite entanglement.
- These energy-based measures offer a potentially superior alternative to entropy-based measures for quantifying entanglement.
- The framework allows for the study of various entanglement types beyond genuine entanglement, including k-nonseparability.
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