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Open AccessSars-Cov2 world pandemic recurrent waves controlled by variants evolution and vaccination campaign
While understanding the time evolution of Covid-19 pandemic is needed to plan economics and tune sanitary policies, a quantitative information of the recurrent epidemic waves is elusive. This work describes a ...
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Article
Open AccessMetastable states in plateaus and multi-wave epidemic dynamics of Covid-19 spreading in Italy
The control of Covid 19 epidemics by public health policy in Italy during the first and the second epidemic waves has been driven by using reproductive number Rt(t) to identify the supercritical (percolative), th...
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Article
Open AccessElectron–hole superfluidity in strained Si/Ge type II heterojunctions
Excitons are promising candidates for generating superfluidity and Bose–Einstein condensation (BEC) in solid-state devices, but an enabling material platform with in-built band structure advantages and scaling...
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Article
Open AccessDimensional crossover and incipient quantum size effects in superconducting niobium nanofilms
Superconducting and normal state properties of Niobium nanofilms have been systematically investigated as a function of film thickness, on different substrates. The width of the superconducting-to-normal trans...
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Article
Zero Helicity States in the LaAlO3-SrTiO3 Interface: The Origin of the Mass Anisotropy
We consider the transverse magnetic moment and torque observed by Li et al. (Nat. Phys. 7, 762 (2011)) in the LaAlO3/SrTiO3 interface and the theoretical model for it based on the zero helicity states. The transv...
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Shape-Resonant Superconductivity in Nanofilms: from Weak to Strong Coupling
Ultrathin superconductors of different materials are becoming a powerful platform to find mechanisms for enhancement of superconductivity, exploiting shape resonances in different superconducting properties. H...
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BCS-BEC Crossover in Quantum Confined Superconductors
Ultranarrow superconductors are in the strong quantum confinement regime with formation of multiple coherent condensates associated with the many subbands of the electronic structure. Here, we analyze the mult...
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On the Compton clock and the undulatory nature of particle mass in graphene systems
In undulatory mechanics the rest mass of a particle is associated to a rest periodicity known as Compton periodicity. In carbon nanotubes the Compton periodicity is determined geometrically, through dimensiona...
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The role of quantum recurrence in superconductivity, carbon nanotubes and related gauge symmetry breaking
Pure quantum phenomena are characterized by intrinsic recurrences in space and time. We use this intrinsic periodicity as a quantization condition to derive a heuristic description of the essential quantum phe...
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Two-Bands Superconductivity with Intra- and Interband Pairing for Synthetic Superlattices
We consider a model for superconductivity in a two-band superconductor, having an anisotropic electronic structure made of two partially overlap** bands with a first hole-like and a second electron-like Ferm...
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Enhanced paraconductivity-like fluctuations in the radiofrequency spectra of ultracold Fermi atoms
Radiofrequency spectroscopy provides a microscopic probe of fermionic pairing in ultracold Fermi gases. Calculations now suggest that there is a one-to-one correspondence between the theory of these spectra an...
