Year: 2017
Type: article
Abstract: We show how the presence of entanglement in a bipartite Gaussian state can be detected by the amount of work extracted by a continuous-variable Szilard-like device, where the bipartite state serves as the working medium of the engine. We provide an expression for the work extracted in such a process and specialize it to the case of Gaussian states. The extractable work provides a sufficient condition to witness entanglement in generic two-mode states, becoming also necessary for squeezed thermal states. We extend the protocol to tripartite Gaussian states and show that the full structure of inseparability classes cannot be discriminated based on the extractable work. This suggests that bipartite entanglement is the fundamental resource underpinning work extraction.
Source: Physical Review A
Language: English
Subfield: Statistical and Nonlinear Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: Julian Schwinger Foundation for Physics Research, Royal Society, Department for Education, UK Government, European Cooperation in Science and Technology, Science Foundation Ireland, Ministero dell’Istruzione, dell’Università e della Ricerca, Horizon 2020 Framework Programme, Engineering and Physical Sciences Research Council, H2020 Marie Skłodowska-Curie Actions
OpenAlex ID: W2591068957