Link to paper mentioned in article. https://journals.aps.org/prx/pdf/10.1103/PhysRevX.5.041011
On Sat, Jun 23, 2018 at 2:31 PM H LV <hveeder...@gmail.com> wrote: > My comment: The article explains that the boost to energy storage rapidly > descreases as the number of entangled particles in a system increases, but > what counts as a system? If a nucleus or an atom is a system of small > number of particles perhaps they are capable of storing more energy under > the right circumstances than was previously thought possible. > Harry > > Synopsis: Putting Quantum Systems to Work > > October 22, 2015 > > Quantum effects such as coherence and entanglement increase a system’s > ability to store energy. > > https://physics.aps.org/synopsis-for/10.1103/PhysRevX.5.041011 > > Engines in cars and airplanes are thermal machines that are capable of > doing work. Scientists have recently demonstrated the existence of > so-called quantum thermal machines, tiny versions of engines and > refrigerators consisting of only a few quantum-mechanical units. When > calculating how much work such microscopic systems can accomplish, quantum > effects such as coherence and entanglement must be taken into account. Now, > researchers have shown that systems in which quantum effects are pronounced > can store more energy than systems that are purely classical. > > Antonio Acín at the Institute of Photonic Sciences, Spain, and co-workers > studied how isolated ensembles of nnquantum particles could optimally store > usable energy. The researchers imagined a set of correlated particles at > the same temperature. These particles are useless individually—one cannot, > for example, run a thermal machine without a temperature gradient—but > correlations among them can be exploited for extracting work. Acín and his > colleagues theoretically demonstrated that entangled states can store more > energy than nonentangled states. However, this advantage vanishes as the > number of particles increases. For example, small ensembles of entangled > particles (n=2n=2) stored 100% more energy than purely classical particles; > for n=50n=50 the quantum advantage reduced to only 2%. This finding > supports the hypothesis that thermodynamics on a macroscopic scale is > insensitive to the underlying microscopic mechanics. The team now plans to > study how different kinds of entanglement affect energy storage. > > This research is published in Physical Review X. > > –Katherine Kornei > > > > ------- > >
