Intrinsic decoherence effects on correlated coherence and quantum discord in XXZ Heisenberg model

Spin qubits are at the heart of technological advances in quantum processors and offer an excellent framework for quantum information processing. This work characterizes the time evolution of coherence and nonclassical correlations in a two-spin XXZ Heisenberg model, from which a two-qubit system is realized. We study the effects of intrinsic decoherence on coherence (correlated coherence) and nonclassical correlations (quantum discord), taking into consideration the combined impact of an external magnetic field, Dzyaloshinsky-Moriya (DM) and Kaplan Shekhtman Entin-Wohlman-Aharony (KSEA) interactions. To fully understand the effects of intrinsic decoherence, we suppose that the system can be prepared in one of the two well-known extended Werner-like (EWL) states. The findings show that intrinsic decoherence leads the coherence and quantum correlations to decay and that the behavior of the aforementioned quantum resources relies strongly on the initial EWL state parameters. We, likewise, found that the two-spin correlated coherence and quantum discord; become more robust against intrinsic decoherence depending on the type of the initial state. These outcomes shed light on how a quantum system should be engineered to achieve quantum advantages

Effect of induced transition on the quantum entanglement and coherence in two-coupled double quantum dots system

Studying quantum properties in solid-state systems is a significant avenue for research. In this scenario, double quantum dots (DQDs) appear as a versatile platform for technological breakthroughs in quantum computation and nanotechnology. This work inspects the thermal entanglement and quantum coherence in two-coupled DODs, where the system is exposed to an external stimulus that induces an electronic transition within each subsystem. The results show that the introduction of external stimulus induces a quantum level crossing that relies upon the Coulomb potential changing the degree of quantum entanglement and coherence of the system. Thus, the quantum properties of the system can be tuned by changing the transition frequency, leading to the enhancement of its quantum properties

Repensar el paisatge urbà per als habitatges socials. Cas d'estudi al barri Orba a Alfafar, València (Espanya)

[ES] El paisaje urbano para la vivienda social es uno de los problemas que existen ahora en la mayoría de los países desarrollados, y un problema futuro para los países en proceso de crecimiento económico y demográfico. Los estados de estos paisajes son resultado de diferentes factores, entre ellos el rápido crecimiento poblacional de las ciudades, y los bajos precios de las viviendas, y también depende del contexto del lugar y la época; esto ha incidido en la carencia y el estado de los paisajes urbanos en estos lugares. Este artículo estudia el concepto de paisaje urbano en la vivienda social, sus orígenes, causas y efectos; tomando como caso de estudio el barrio de Orba del Ayuntamiento de Alfafar en Valencia. Esta intervención paisajística para este barrio se basará en el estudio de otras actuaciones similares, así como otros proyectos paisajísticos para conseguir alguna recomendación a aplicar al master plan del barrio de Orba para satisfacer las necesidades de la población de esta zona y teniendo también en cuenta las presupuesto del ayuntamiento, para crear espacios verdes de calidad que respeten la identidad del territorio, la cultura, la cohesión y la diversidad, con un enfoque interdisciplinar y el respeto y equilibrio entre lo urbano, lo natural y lo económico.[EN] The urban landscape for social housing is one of the problems that exist now in most developed countries, and a future problem for countries in the process of economic and demographic growth. The states of these landscapes are the result of different factors, among them the fast population growth of the cities, and the low prices of houses, and it also depends on the context of the place and the time; this has affected the lack and the state of the urban landscapes in these places. This paper studies the concept of the urban landscape in social housing, its origins, causes and effects; taking as a case study the neighborhood of Orba in the Town Hall of Alfafar in Valencia. This landscaping intervention for this neighborhood will be based on the study of other similar actions, likewise other landscape projects to get some recommendation to apply to the master plan of the Orba neighborhood to satisfy the needs of the population of this area and also taking into account the budget of the city council, to create green spaces of quality that respect the identity of the territory, culture, cohesion and diversity, with an interdisciplinary approach and respect and balance between the urban, the natural and the economic.Dahbi, Z. (2023). Rethinking the urban landscape for socials housing. Case study in the Orba neighborhood in Alfafar, Valencia (Spain). Universitat Politècnica de València. http://hdl.handle.net/10251/20191