News
EPJ D Highlight - Hi-fi single photons
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- Published on 21 October 2012
A trade-off between photon source settings and detector specific requirements allows the generation of high-fidelity single photons.
Many quantum technologies—such as cryptography, quantum computing and quantum networks—hinge on the use of single photons. While she was at the Kastler Brossel Laboratory (affiliated with the Pierre and Marie Curie University, École Normale Supérieure and CNRS) in Paris, France, Virginia d’Auria and her colleagues identified the extent to which photon detector characteristics shape the preparation of a photon source designed to reliably generate single photons. In a paper just publishedEPJ B - Noise down, neuron signals up
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- Published on 20 August 2012
A new model of background noise present in the nervous system could help better understand neuronal signalling delay in response to a stimulus.
Biomedical engineer Muhammet Uzuntarla from Bulent Ecevit University, Turkey, and his colleagues present a biologically accurate model of the underlying noise which is present in the nervous system. The article has just been published in EPJB. This work has implications for explaining how noise, modulated by unreliable synaptic transmission, induces a delay in the response of neurons to external stimuli as part of the neurons coding mechanism.
EPJ B - Banks’ cash stash: no shield against bankruptcy
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- Published on 20 August 2012
Imposing minimal capital levels for banks is like attempting to solve a complex jigsaw puzzle with a poorly fitting piece that could lead to even greater chaos.
According to theoretical physicists João da Cruz and Pedro Lind from Lisbon University, Portugal, imposing minimum capital levels for banks may not prevent the insolvency of a minority of banks from triggering a widespread banking system collapse. In a study just published in EPJB, the researchers explain why this measure could instead lead to larger crises.
EPJ E - Too cool to follow the law
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- Published on 10 August 2012
Study suggests viscous materials do not follow standard laws below a sub-melting point threshold.
So-called glass-formers are a class of highly viscous liquid materials that have the consistency of honey and turn into brittle glass once cooled to sufficiently low temperatures. Zhen Chen and his colleagues from Arizona State University, USA, have elucidated the behaviour of these materials as they are on the verge of turning into glass in an article just published in EPJE.
EPJ B - Telling the tale of the wealth tail
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- Published on 10 August 2012
Models designed to represent taxation and wealth redistribution could be adjusted to reflect a target level of wealth distribution.
A mathematical physicist and her colleague, both from the Free University of Bozen-Bolzano, Italy, are just published a study in EPJB on a family of taxation and wealth redistribution models. The findings could lead to numerical simulations of potential wealth distribution scenarios playing out over the long term and could be used for policy decision making.
EPJ B - Turbulences at a standstill
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- Published on 10 August 2012
Energy flowing from large-scale to small-scale places may be prevented from flowing freely in specific conditions.
For theoretical physicist Dima Shepelyansky from the CNRS-University of Toulouse, France, devising models of chaos and turbulence is his bread and butter. In a recent study published in EPJB, he presents an exception he found in a model of turbulence, indicating that there are energy flows from large to small scale in confined space. Indeed, under a specific energy threshold, there are no energy flows, similar to the way electron currents and energy spreading are stopped in disordered solids.
EPJ D - Disentangling information from photons
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- Published on 10 August 2012
Study describes greater chances of accessing more reliable information on applications in quantum computing and cryptography.
Theoretical physicist Filippo Miatto and colleagues from the University of Strathclyde, Glasgow, UK, have found a new method of reliably assessing the information contained in photon pairs used for applications in cryptography and quantum computing. The findings, published in EPJD, are so robust that they enable access to the information even when the measurements on photon pairs are imperfect.
EPJ E – Turbulent convection at the core of fluid dynamics
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- Published on 10 August 2012
Buoyant convection of a fluid subjected to thermal differences is a classical problem in fluid dynamics. Its importance is compounded by its relevance to many natural and technological phenomena. For example, in the Earth atmosphere, the study of thermal convection allows us to do weather forecasts and, on larger time and length-scales, climate calculations. In the oceans, where there are differences in temperature and salinity, turbulent convection drives deep-water currents. Geology and astrophysics are other areas where thermal convection has great impact.
EPJ E – Graphical abstracts now required in EPJ E
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- Published on 10 August 2012
We are pleased to inform the readers and authors of EPJ E that from now on articles published in EPJ E will feature a graphical abstract. While it is not meant to provide specific results, this element will serve the purpose of conveying visually the gist of the article, along with the title. Authors may use an item already present in the manuscript or a purpose-made graphic. The use of color is strongly encouraged. Images previously published under the copyright of other publishers cannot be considered.
EPJ Plus – Determination of a time shift in the OPERA setup using high-energy horizontal muons in the LVD and OPERA detectors
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- Published on 10 August 2012
The halls of the INFN Gran Sasso Laboratory (LNGS) were built in the 1980s based on the design of A. Zichichi and oriented towards CERN for experiments on neutrino beams. In 2006, the CERN Neutrinos to Gran Sasso (CNGS) beam was ready and the search could start for tau-neutrino appearances in the muon-neutrino beam produced at CERN. The OPERA detector was designed and built for this purpose.
