# Work Extraction and Energy Storage in the Dicke Model

**Authors:** Lorenzo Fusco, Mauro Paternostro, Gabriele De Chiara  
**arXiv:** [1605.06286](https://arxiv.org/abs/1605.06286)  
**Date:** 2016-05-20  
**Summary page:** https://www.summarizepaper.com/en/arxiv-id/1605.06286v1/

## Key points

- Authors investigate work extraction from the Dicke model
- Consider non-optimal unitary protocol and energetic cost of creating initial state
- Analyze role of entanglement in work extraction
- Highly entangled states can be inefficient for energy storage when considering energetic cost
- Contradicts common belief that entanglement improves work extraction, although criticality can enhance it
- Many-body system advantageous for work extraction, but entanglement not necessarily advantageous for energy storage with non-optimal processes
- Need to understand interconnections between non-equilibrium thermodynamics, quantum systems, and correlations among subparts
- Research sheds light on relationship between entanglement, energy storage, and work extraction in quantum systems
- Provides insights into optimizing processes for efficient energy utilization

## Summary

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In their study titled "Work Extraction and Energy Storage in the Dicke Model," authors Lorenzo Fusco, Mauro Paternostro, and Gabriele De Chiara investigate the process of work extraction from the Dicke model. They consider both a non-optimal unitary protocol and the energetic cost of creating the initial state. The researchers focus on analyzing the role of entanglement in work extraction and find that highly entangled states can be inefficient for energy storage when taking into account the energetic cost of creating such states. This surprising result contradicts the common belief that entanglement improves work extraction, even though criticality in the model can enhance it. While demonstrating the advantages of using a many-body system for work extraction, this study highlights that entanglement is not necessarily advantageous for energy storage purposes when non-optimal processes are considered. The findings emphasize the need to better understand the complex interconnections between non-equilibrium thermodynamics of quantum systems and correlations among their subparts. Overall, this research sheds light on the intricate relationship between entanglement, energy storage, and work extraction in quantum systems. It provides valuable insights into optimizing processes for efficient energy utilization and underscores the importance of considering both entanglement effects and energetic costs in practical applications.