The nymph of Zyginella pulchra Löw, 1885: (Hemiptera, Cicadellidae, Typhlocybinae)

Das fünfte Larvenstadium von Zyginella pulchra Löw (Cicadellidae, Typhlocybinae) wird beschrieben und mit anderen Laubgehölze besiedelnden Typhlocybinae verglichen.The 5th instar nymph of Zyginella pulchra Löw (Cicadellidae, Typhlocybinae) is described and compared with other tree-associated typhlocybine species

Polyatomic trilobite Rydberg molecules in a dense random gas

Trilobites are exotic giant dimers with enormous dipole moments. They consist of a Rydberg atom and a distant ground-state atom bound together by short-range electron-neutral attraction. We show that highly polar, polyatomic trilobite states unexpectedly persist and thrive in a dense ultracold gas of randomly positioned atoms. This is caused by perturbation-induced quantum scarring and the localization of electron density on randomly occurring atom clusters. At certain densities these states also mix with a s-state, overcoming selection rules that hinder the photoassociation of ordinary trilobites

Polyatomic trilobite Rydberg molecules in a dense random gas

Trilobites are exotic giant dimers with enormous dipole moments. They consist of a Rydberg atom and a distant ground-state atom bound together by short-range electron-neutral attraction. We show that highly polar, polyatomic trilobite states unexpectedly persist and thrive in a dense ultracold gas of randomly positioned atoms. This is caused by perturbation-induced quantum scarring and the localization of electron density on randomly occurring atom clusters. At certain densities these states also mix with a s-state, overcoming selection rules that hinder the photoassociation of ordinary trilobites

Chelifer longimanus Kollar, 1848: a nomen nudum corresponding to Neobisium spelaeum (Schiödte, 1847) (Pseudoscorpiones: Chelonethi: Neobisiidae)

The manuscript name Chelifer longimanus Kollar, 1848, most often cited as Obisium longimanum Kollar, was first introduced in a note by Kollar (1848) that has been overlooked in the taxonomic literature on pseudoscorpions. No description or indication has been associated with this name, which is therefore a nomen nudum. It corresponds to the valid pseudoscorpion species Neobisium spelaeum (Schiödte, 1847), having been found at one of the type localities of the latter (Postojna Cave, Slovenia). Two specimens originally identified as O. longimanum (probably by V. Kollar) are present in the collections of the Naturhistorisches Museum Wien

Festival Space: gender, liminality and the carnivalesque

Purpose - Contemporary outdoor rock and popular music festivals offer liminal spaces in which event participants can experience characteristics associated with the carnivalesque. Festival goers celebrate with abandonment, excess and enjoy a break from the mundane routine of everyday life. The aim of this conceptual paper is to explore the way gender is negotiated in the festival space. Design/methodology/approach - The rock and popular music tribute festival, known as ‘Glastonbudget’ provides the focus for this conceptual paper. A pilot ethnographic study at the event utilising photographic imagery was used to understand the way in which gender is displayed. Findings - It is suggested that liminal zones offer space to invert social norms and behave with abandonment and freedom away from the constraints of the everyday but neither women nor men actually take up this opportunity. The carnivalesque during Glastonbudget represents a festival space which consolidates normative notions of gender hierarchy via a complicated process of othering. Research limitations/implications - This is a conceptual paper which presents the need to develop social science based studies connecting gender to the social construction of event space. The ideas developed in this article need to be further explored further building upon the research design established here. Originality/value – There is currently a paucity of literature surrounding the concept of gender within these festival spaces especially in relation to liminality within events research

Observation of mesoscopic crystalline structures in a two-dimensional Rydberg gas

The ability to control and tune interactions in ultracold atomic gases has paved the way towards the realization of new phases of matter. Whereas experiments have so far achieved a high degree of control over short-ranged interactions, the realization of long-range interactions would open up a whole new realm of many-body physics and has become a central focus of research. Rydberg atoms are very well-suited to achieve this goal, as the van der Waals forces between them are many orders of magnitude larger than for ground state atoms. Consequently, the mere laser excitation of ultracold gases can cause strongly correlated many-body states to emerge directly when atoms are transferred to Rydberg states. A key example are quantum crystals, composed of coherent superpositions of different spatially ordered configurations of collective excitations. Here we report on the direct measurement of strong correlations in a laser excited two-dimensional atomic Mott insulator using high-resolution, in-situ Rydberg atom imaging. The observations reveal the emergence of spatially ordered excitation patterns in the high-density components of the prepared many-body state. They have random orientation, but well defined geometry, forming mesoscopic crystals of collective excitations delocalised throughout the gas. Our experiment demonstrates the potential of Rydberg gases to realise exotic phases of matter, thereby laying the basis for quantum simulations of long-range interacting quantum magnets.Comment: 10 pages, 7 figure