1,720,985 research outputs found
Exactly solvable model of a highly efficient thermoelectric engine
No full textWe propose a simple classical dynamical model of a thermoelectric (or thermochemical) heat engine based on a pair of ideal gas containers connected by two unequal scattering channels. The model is solved analytically and it is shown that a suitable combination of parameters can be chosen such that the engine operates at Carnot's efficiency
Wigner separability entropy and complexity of quantum dynamics
Full text linkWe propose the Wigner separability entropy as a measure of complexity of a quantum state. This quantity measures the number of terms that effectively contribute to the Schmidt decomposition of the Wigner function with respect to a chosen phase-space decomposition. We prove that the Wigner separability entropy is equal to the operator space entanglement entropy, measuring entanglement in the space of operators, and, for pure states, twice the entropy of entanglement. The quantum to classical correspondence between the Wigner separability entropy and the separability entropy of the classical phase-space Liouville density is illustrated by means of numerical simulations of chaotic maps. In this way, the separability entropy emerges as an extremely broad complexity quantifier in both the classical and quantum realms. © 2012 American Physical Society.Fil: Benenti, Giuliano. Istituto Nazionale di Fisica Nucleare; Italia. Università degli Studi dell'Insubria; ItaliaFil: Carlo, Gabriel Gustavo. Comisión Nacional de Energía Atómica. Gerencia de Área Investigaciones y Aplicaciones No Nucleares. Gerencia Física (CAC). Departamento de Física de la Materia Condensada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Prosen, Toma. Universidad de Ljubljana; Esloveni
A one-dimensional hard-point gas and thermoelectric efficiency
No full text10.1088/1742-5468/2009/03/L03004Journal of Statistical Mechanics: Theory and Experiment20093
Nanocoolers
No full textWe present a simple kinematic model of a non-equilibrium steady state device, which can operate either as a heat engine or as a refrigerator. The model is composed of two or more scattering channels where the motion is fully described by deterministic classical dynamics, which connect a pair of stochastic (infinite) heat and particle baths at unequal temperatures. We discuss precise kinematic conditions under which our model may approach Carnot's optimal efficiency in different situation
Detecting entanglement of random states with an entanglement witness
No full text10.1088/1751-8113/40/45/017Journal of Physics A: Mathematical and Theoretical404513787-1379
Magnetically induced thermal rectification
No full text10.1103/PhysRevLett.98.104302Physical Review Letters9810-PRLT
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