Abstract
Work and quantum correlations are two fundamental resources in thermodynamics and quantum information theory. In this work we study how to use correlations among quantum systems to optimally store work. We analyse this question for isolated quantum ensembles, where the work can be naturally divided into two contributions: a local contribution from each system, and a global contribution originating from correlations among systems. We focus on the latter and consider quantum systems which are locally thermal, thus from which any extractable work can only come from correlations. We compute the maximum extractable work for general entangled states, separable states, and states with fixed entropy. Our results show that while entanglement gives an advantage for small quantum ensembles, this gain vanishes for a large number of systems.
Original language  English 

Article number  041011 
Number of pages  14 
Journal  Physical Review X 
Volume  5 
DOIs  
Publication status  Published  22 Oct 2015 
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Dr Paul Skrzypczyk
 School of Physics  Proleptic Associate Professor and Royal Society University Research Fellow
Person: Academic