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Work extraction and energy storage in the Dicke model
Lorenzo Fusco1, Mauro Paternostro1, Gabriele De Chiara1
1Centre for Theoretical Atomic, Molecular and Optical Physics, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, United Kingdom.
Physical Review. E
|December 15, 2016
Summary
Extracting work from quantum systems is complex. Highly entangled states may be inefficient for energy storage due to creation costs, even when criticality aids work extraction in many-body systems.
Area of Science:
- Quantum thermodynamics
- Many-body physics
- Quantum information theory
Background:
- The Dicke model describes light-matter interaction, a fundamental system in quantum optics.
- Work extraction from quantum systems is crucial for quantum technologies.
- Entanglement's role in quantum thermodynamics is an active area of research.
Purpose of the Study:
- To investigate work extraction efficiency in the Dicke model.
- To analyze the impact of non-optimal protocols and state preparation costs.
- To clarify the relationship between entanglement and energy storage.
Main Methods:
- Utilizing simple unitary cyclic transformations for work extraction.
- Analyzing the Dicke model, considering non-optimal unitary protocols.
- Evaluating the energetic cost of creating initial quantum states.
- Studying the influence of quantum entanglement on energy storage.
Main Results:
- Highly entangled states can be inefficient for energy storage when considering state preparation costs.
- Criticality in the Dicke model can significantly enhance work extraction.
- Entanglement is not always beneficial for energy storage in non-optimal processes.
- Many-body systems offer advantages for work extraction.
Conclusions:
- Understanding the interplay between quantum correlations and thermodynamics is vital.
- Non-optimal processes complicate the benefits of entanglement in energy storage.
- Further research is needed on the complex connections between quantum systems, thermodynamics, and correlations.
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