Correlation approach to work extraction from finite quantum systems
arXiv:1404.7785 · doi:10.1088/0953-4075/48/3/035501
Abstract
Reversible work extraction from identical quantum systems via collective operations was shown to be possible even without producing entanglement among the sub-parts. Here, we show that implementing such global operations necessarily imply the creation of quantum correlations, as measured by quantum discord. We also reanalyze the conditions under which global transformations outperform local gates as far as maximal work extraction is considered by deriving a necessary and sufficient condition that is based on classical correlations.
References in corpus (6)
- Quantum discord and the power of one qubit
- Experimental quantum computing without entanglement
- Operational Significance of Discord Consumption: Theory and Experiment
- Quantum discord bounds the amount of distributed entanglement
- Entanglement, discord and the power of quantum computation
- Global quantum correlations in finite-size spin chains