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Can we study the many-body localisation transition? (Vol. 51, No. 2)
An interacting quantum system experiencing strong disorder can undergo a transition into a non-thermalising phase: an effect known as many-body localisation (MBL).
Delocalisation transition is understood to be driven by the hybridisation of resonant many-body configurations which can only form above a certain length scale. Experimental efforts are hindered by the finite lifetimes of the system, so one cannot truly distinguish localisation from very slow dynamics. In this letter the length- and timescales required to observe thermalisation, and how they grow when approaching the MBL transition from the delocalised side are studied. The results suggest that reliably characterising the transition’s critical properties is beyond the reach of current experimental and numerical techniques.
R. K. Panda et al, Can we study the many-body localisation transition?, EPL 128 67003 (2019)
[Abstract]
mm Universe @ NIKA2 (Vol. 51, No. 2)
Conference Proceedings
NIKA2 is a millimetre camera recently installed at the 30-m telescope of IRAM. It can survey large areas of the sky at a high-angular resolution, with a high sensitivity and a large field of view. It allows observers to address questions, such as the environment impact on dust properties, the star formation processes at low and high redshifts, the evolution of the large-scale structures and the use of galaxy clusters for precision cosmology. In June 2019, the mm Universe conference in Grenoble brought together the scientific community working with the NIKA2 camera. It was the first edition in a series of conferences that will accompany the scientific exploitation of NIKA2.
F. Mayet, A. Catalano, J.F. Macías-Pérez and L. Perotto (Eds.), mm Universe @ NIKA2 - Observing the mm Universe with the NIKA2 Camera, Grenoble, France, June 3-7, 2019, EPJ Web of Conferences 228 (2020), ISBN: 978-2-7598-9097-2
[Proceedings]
Nano amorphous Interfaces in phase-change memory materials (Vol. 51, No. 2)
Phase-change memory (PCM) is an emerging non-volatile memory technology. It encodes data through the rapid and reversible transition between amorphous and crystalline states of PCM materials.
In this work the effects of three kinds of nano amorphous interfaces in PCM materials are summarised, i.e. interfaces could either enhance phase stability (the amorphous Si/amorphous Sb
X.-P. Wang, Y.-T. Liu, Y.-J. Chen, N.-K. Chen and X.-B. Li, Nanoscale amorphous interfaces in phase-change memory materials: structure, properties and design, J. Phys. D: Appl. Phys. 53, 114002 (2020)
[Abstract]
Laser-based prototype probes cold atom dynamics (Vol. 51, No. 2)
A new prototype design doubles the frequencies of widely used telecommunications lasers to study the dynamics of cold atoms while in space.
By tracking the motions of cold atom clouds, astronomers can learn much about the physical processes which play out in the depths of space. In this work, an innovative prototype for a new industrial laser system is presented that paves the way for development of cold atom inertial sensors in space.
R. Caldani, S. Merlet, F.P. Dos Santos, G. Stern, A. Martin, B. Desruelle, V. Ménoret, A prototype industrial laser system for cold atom inertial sensing in space, European Physical Journal D 73, 248 (2019)
[Abstract]
