Zobrazeno 1 - 10
of 110
pro vyhledávání: '"Jenkins, Alejandro"'
Based on the results of a previous analysis of the Markovian master equation for the irreversible evolution of an open system embedded in de Sitter space, we include in the cosmological Friedmann equations a contribution from the presence of a physic
Externí odkaz:
http://arxiv.org/abs/2307.04803
Publikováno v:
Phys. Rev. D 108, 123530 (2023)
We consider the local physics of an open quantum system embedded in an expanding three-dimensional space $\mathbf x$, evolving in cosmological time $t$, weakly coupled to a massless quantum field. We derive the corresponding Markovian master equation
Externí odkaz:
http://arxiv.org/abs/2307.04800
Publikováno v:
New J. Phys. 25, 113013 (2023)
We treat the Cooper pairs in the superconducting electrodes of a Josephson junction (JJ) as an open system, coupled via Andreev scattering to external baths of electrons. The disequilibrium between the baths generates the direct-current bias applied
Externí odkaz:
http://arxiv.org/abs/2302.04762
Publikováno v:
Entropy 23, 1095 (2021)
Engines are open systems that can generate work cyclically, at the expense of an external disequilibrium. They are ubiquitous in nature and technology, but the course of mathematical physics over the last 300 years has tended to make their dynamics i
Externí odkaz:
http://arxiv.org/abs/2108.07428
Autor:
Alicki, Robert, Jenkins, Alejandro
Using the quantum Markovian master equation, we show that convection in the stellar photosphere generates plasma waves by an irreversible process akin to Zeldovich superradiance and sonic booms. In the Sun, this mechanism is most efficient in quiet r
Externí odkaz:
http://arxiv.org/abs/2103.08746
Publikováno v:
Phys. Chem. Chem. Phys. 23, 9428 (2021)
We propose a dynamical theory of how the chemical energy stored in a battery generates the electromotive force (emf). In this picture, the battery's half-cell acts as an engine, cyclically extracting work from its underlying chemical disequilibrium.
Externí odkaz:
http://arxiv.org/abs/2010.16400
Publikováno v:
Phys. Rev. E 103, 052131 (2021)
We introduce the "leaking elastic capacitor" (LEC) model, a nonconservative dynamical system that combines simple electrical and mechanical degrees of freedom. We show that an LEC connected to an external voltage source can be destabilized (Hopf bifu
Externí odkaz:
http://arxiv.org/abs/2010.05534
Autor:
Alicki, Robert, Jenkins, Alejandro
Publikováno v:
Phys. Rev. Lett. 125, 186101 (2020)
We propose a microphysical theory of the triboelectric effect by which mechanical rubbing separates charges across the interface between two materials. Surface electrons are treated as an open system coupled to two baths, corresponding to the bulks.
Externí odkaz:
http://arxiv.org/abs/1904.11997
Studies of emerging photovoltaics, such as organic and perovskite solar cells, have recently shown that the separation of photo-generated charge carriers is correlated with non-thermal, coherent oscillations within the illuminated device. We consider
Externí odkaz:
http://arxiv.org/abs/1901.10873
Self-oscillatory and self-rotatory process driven by non-conservative forces have usually been treated as applications of the concepts of Hopf bifurcation and limit cycle in the theory of differential equations, or as instability problems in feedback
Externí odkaz:
http://arxiv.org/abs/1806.01527