101,990 research outputs found
Wigner separability entropy and complexity of quantum dynamics
No full textWe 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
The equilibrium limit of the Casati-Prosen model
No full textAn alternative explanation of the decoherence in the Casati–Prosen model is presented. It is based on the self-induced decoherence formalism extended to non-integrable systems.Fil: Castagnino, Mario Alberto G. J.. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentin
Nops farhati Prosen. Four 1949
No full textNops farhati Prosen, 1949 Figure 50A‒J Nops farhati Prosen, 1949: 321, figs A– C. Birabén, 1954: 43, fig. 7. Male holotype from Campo Gallo, Santiago del Estero, Argentina, iii.1943, A.F. Prosen (MLP 321; examined). Nops proseni Birabén, 1954: 43, figs 1–6, 8–10. Male holotype from Balbuena, Salta, Argentina, 12.x.1948, A.F. Prosen (MLP 320; examined). New Synonymy Remarks. The male holotype of Nops proseni has the same conformation of bulb and embolus as the male holotype of Nops farhati; and we were unable to discover differences in the tips of the embolus (Fig. 50I ‒J). Slight differences between both specimens noted by Birabén (1954) as related to color and size, could be a variation between populations separated more than 300 km. Diagnosis. Males resemble similar congener Nops minas n. sp. by having the PLS two times longer than the PMS, and a similar straight embolus and shorter than palpal tibia (Fig. 64B‒D); but can be distinguished by having the posterior unpaired claws elongated and dorsally reflexed (Fig. 5B) and a shorter embolus, with the tip lacking the wide cut on prolateral side (Fig. 50C‒D, G‒H). Description. Male (holotype MPL 321): Carapace light orange (Fig. 50A, E). Chelicerae, labium, coxae and legs yellowish orange. Endites and sternum orange (Fig. 50B, F). Abdomen light gray, dorsal pattern as in figure 6I but almost unnoticeable; lighter, almost white ventrally. Anal tubercle and spinnerets lighter. Total length 7.8. Carapace 3.6 long, 3.1 wide. Sternum 3.0 long, 2.8 wide. Leg measurements: I: 3.6; II: 3.5; III: 3.3; IV: 3.7. Posterior unpaired claws elongated and dorsally reflexed. PLS longer than PMS. Palp with embolus shorter than palpal tibia, straight (Fig. 50C‒D, G‒H); with wide embolar tip, and two long extensions: one ventral and one dorsal (Fig. 50I ‒J). Female: unknown Variation. Specimen from Salta (MLP 320), is smaller than the specimen from Santiago del Estero (MLP 321), and has dorsally several irregular, small dark gray spots in the proximal part, and radiant light bands from the midline in the apical part, inconspicuous due to alcohol preservation (Fig. 50E). Distribution. North of Argentina (Fig. 52A).Published as part of Sánchez-Ruiz, Alexander & Brescovit, Antonio D., 2018, A revision of the Neotropical spider genus Nops MacLeay (Araneae: Caponiidae) with the first phylogenetic hypothesis for the Nopinae genera, pp. 1-121 in Zootaxa 4427 (1) on pages 78-79, DOI: 10.11646/zootaxa.4427.1.1, http://zenodo.org/record/127177
Negative differential conductivity in far-from-equilibrium quantum spin chains
No full text10.1209/0295-5075/85/37001EPL853
Thermalization and ergodicity in one-dimensional many-body open quantum systems
No full text10.1103/PhysRevE.81.051135Physical Review E - Statistical, Nonlinear, and Soft Matter Physics815-PLEE
Charge and spin transport in strongly correlated one-dimensional quantum systems driven far from equilibrium
No full text10.1103/PhysRevB.80.035110Physical Review B - Condensed Matter and Materials Physics803-PRBM
Rule Execution and Event Distribution Middleware for PROSEN-WSN
No full textThis paper presents a prototype wireless sensor network middleware REED (rule execution and event distribution). This middleware supports both the distribution of rules and the events that trigger them. REED employs a rule-based paradigm to allow sensor networks to be programmed at run time. This provides a flexible environment where applications and users can programme the sensor nodes to allow their behaviour to be changed at run time. Such a rule-based approach allows a number of services such as subscribe-notify to be constructed. A prototype system for PROSEN-WSN has been implemented which demonstrates the REED middleware. The main contribution of this paper is the ability to programme a rule-based WSN at run time. However we also illustrate the power of such rule-based programming on a working prototype. Our focus is on supporting the processing, filtering, and collating of data collected by a WSN
A one-dimensional hard-point gas and thermoelectric efficiency
No full text10.1088/1742-5468/2009/03/L03004Journal of Statistical Mechanics: Theory and Experiment20093
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
Nonequilibrium properties of the one-dimensional hard-point gas system
No full text10.1103/PhysRevE.74.037201Physical Review E - Statistical, Nonlinear, and Soft Matter Physics743-PLEE
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