A squeezed review on coherent states and nonclassicality for non-Hermitian systems with minimal length

It was at the dawn of the historical developments of quantum mechanics when Schrödinger, Kennard and Darwin proposed an interesting type of Gaussian wave packets, which do not spread out while evolving in time. Originally, these wave packets are the prototypes of the renowned discovery, which are familiar as “coherent states” today. Coherent states are inevitable in the study of almost all areas of modern science, and the rate of progress of the subject is astonishing nowadays. Nonclassical states constitute one of the distinguished branches of coherent states having applications in various subjects including quantum information processing, quantum optics, quantum superselection principles and mathematical physics. On the other hand, the compelling advancements of non-Hermitian systems and related areas have been appealing, which became popular with the seminal paper by Bender and Boettcher in 1998. The subject of non-Hermitian Hamiltonian systems possessing real eigenvalues are exploding day by day and combining with almost all other subjects rapidly, in particular, in the areas of quantum optics, lasers and condensed matter systems, where one finds ample successful experiments for the proposed theory. For this reason, the study of coherent states for non-Hermitian systems have been very important. In this article, we review the recent developments of coherent and nonclassical states for such systems and discuss their applications and usefulness in different contexts of physics. In addition, since the systems considered here originated from the broader context of the study of minimal uncertainty relations, our review is also of interest to the mathematical physics communit

Robust multi-objective and multi-level optimization of complex mechanical structures

International audienceThis paper presents a new approach to robust multi-objective and multi-level optimization of the design of complex mechanical structures. The optimization is at two levels: system and elements. At system-level, the robust multi-objective problem has four cost functions: on the one hand the minimization of the global mass and displacement at a fixed point of the mechanical structure, and on the other hand the maximization of both the robustness and the displacement of the mass. At element-level the robust multi-objective problem has two cost functions: minimization of the element mass and maximization of its robustness. A robust condensation technique, based on an enriched Karhunen–Loeve condensation, is used for complex structures which require a large finite element model. In contrast to existing formulations, this new approach takes into account uncertainties in the design parameters at system-level and element-level. It also allows for the task sharing which is commonly used in structural engineering

Meteorite finds from southern Tunisia

View references (6) We report on the meteorite search campaign of April 2008, conducted by a joint Tunisian- Italian scientific expedition in southern Tunisia (Dahar region). Nine likely unpaired meteorites (seven H-class and two L-class chondrites) totalling ∼1.3 kg were recovered by exploring an approximately 45 km2 area, therefore demonstrating that southern Tunisia is a suitable terrain for systematic searches for meteorites

Etude chimique et biologique des huiles essentielles de Juniperus phoenicea ssp. lycia et Juniperus phoenicea ssp. turbinata du Maroc

Chemical and biological study of essential oils of Moroccan Juniperus phoenicea ssp. lycia and Juniperus phoenicea ssp. turbinata. The composition of the essential oils of the branches and berries of Juniperus phoenicea (Cupressaceae), J. phoenicea ssp. lycia (plain) and J. phoenicea ssp. turbinata (mountain), obtained by hydrodistillation, collected from Morocco, was analyzed by GC and GC/MS. The yields of essential oils were varying in function of the subspecies and of the part of the plant studied. The essential oils of these tree species are largely dominated by α-pinene and may be an important source of this component of a great interest on the international market. The effectiveness of essential oils from branches of the subspecies lycia against fungi decay wood has also been emphasized

Activité antimicrobienne et composition chimique de l'huile essentielle de Plectranthus aromaticus Roxb. de l'Ile de la Grande Comore

Antimicrobial activity and chemical composition of Plectranthus aromaticus Roxb. essential oil from Grande Comore Island. This work aims to study the antibacterial and antifungal activity and chemical composition of Plectranthus aromaticus essential oil from Grande Comore Island. This species has provided an essential oil with a yield of 1.31%. The chromatographic analysis (GC and GC/MS) of the essence of P. aromaticus has identified about 32 constituents which are the most dominant: the trans-verbenol (23.11%), carvacrol (22.96%) and 1,4-cineol (14.50%). The antimicrobial activity of this oil has been studied with respect to seven microorganisms. The essential oil of P. aromaticus has proven antibacterial and antifungal activity at low concentrations

Advanced human RF exposure assessment using FDTD and polynomial chaos expansion

International audienc