Dynamics of entanglement entropy and entanglement spectrum crossing a quantum phase transition

We study the time evolution of entanglement entropy and entanglement spectrum in a finite-size system which crosses a quantum phase transition at different speeds. We focus on the Ising model with a time-dependent magnetic field, which is linearly tuned on a time scale $\tau$ . The time evolution of the entanglement entropy displays different regimes depending on the value of $\tau$, showing also oscillations which depend on the instantaneous energy spectrum. The entanglement spectrum is characterized by a rich dynamics where multiple crossings take place with a gap-dependent frequency. Moreover, we investigate the Kibble-Zurek scaling of entanglement entropy and Schmidt gap.Comment: Accepted for publication in Phys. Rev.

Adiabatic perturbation theory and geometry of periodically-driven systems

We give a systematic review of the adiabatic theorem and the leading non-adiabatic corrections in periodically-driven (Floquet) systems. These corrections have a two-fold origin: (i) conventional ones originating from the gradually changing Floquet Hamiltonian and (ii) corrections originating from changing the micro-motion operator. These corrections conspire to give a Hall-type linear response for non-stroboscopic (time-averaged) observables allowing one to measure the Berry curvature and the Chern number related to the Floquet Hamiltonian, thus extending these concepts to periodically-driven many-body systems. The non-zero Floquet Chern number allows one to realize a Thouless energy pump, where one can adiabatically add energy to the system in discrete units of the driving frequency. We discuss the validity of Floquet Adiabatic Perturbation Theory (FAPT) using five different models covering linear and non-linear few and many-particle systems. We argue that in interacting systems, even in the stable high-frequency regimes, FAPT breaks down at ultra slow ramp rates due to avoided crossings of photon resonances, not captured by the inverse-frequency expansion, leading to a counter-intuitive stronger heating at slower ramp rates. Nevertheless, large windows in the ramp rate are shown to exist for which the physics of interacting driven systems is well captured by FAPT.The authors would like to thank M. Aidelsburger, M. Atala, E. Dalla Torre, N. Goldman, M. Heyl, D. Huse, G. Jotzu, C. Kennedy, M. Lohse, T. Mori, L. Pollet, M. Rudner, A. Russomanno, and C. Schweizer for fruitful discussions. This work was supported by AFOSR FA9550-16-1-0334, NSF DMR-1506340, ARO W911NF1410540, and the Hungarian research grant OTKA Nos. K101244, K105149. M. K. was supported by Laboratory Directed Research and Development (LDRD) funding from Berkeley Lab, provided by the Director, Office of Science, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. The authors are pleased to acknowledge that the computational work reported in this paper was performed on the Shared Computing Cluster which is administered by Boston University's Research Computing Services. The authors also acknowledge the Research Computing Services group for providing consulting support which has contributed to the results reported within this paper. The study of the driven non-integrable transverse-field Ising model was carried out using QuSpin [185] - an open-source state-of-the-art Python package for dynamics and exact diagonalization of quantum many body systems, available to download here. (FA9550-16-1-0334 - AFOSR; DMR-1506340 - NSF; W911NF1410540 - ARO; K101244 - Hungarian research grant OTKA; K105149 - Hungarian research grant OTKA; DE-AC02-05CH11231 - Laboratory Directed Research and Development (LDRD) funding from Berkeley Lab)https://arxiv.org/pdf/1606.02229.pd

[Heart and lipids: not just atherosclerosis]

Heart and lipids: not just atherosclerosi

Regulation knowledge presentation

The ASSET-Road project is focussing on improving road safety and road traffic by pushing different transportation stakeholders to interact between each other and integrating modern communication and sensing technologies. This deliverable is the result of the project tasks 3.1 (Regulation knowledge & awareness study), 3.2 (Situation identification & information presentation) and part of task 3.3 (Smart information provision Mechanism & HMI). In brief, objectives of the deliverable are: 1. to report the study conducted in task 3.1 where information about how deep drivers\u92 knowledge is (for truck and coaches drivers) have been collected in several countries in relation to road and safety regulations (e.g. speed limits on different roads, traffic rules, safety equipments, etc.). This is the first part of the document and includes two studies, the first one conducted in Europe and the second one conducted in Tanzania; a comparison between them is proposed; 2. to describe the smart In-Vehicle Information System specifications based on the requirements collected in WP1 (task 1.2 Users needs and requirements). In this section systems features are briefly introduced and the simulator study setup where the system will be tested is described, including scenario setup, situation identification and simulator iterations

Coronary Plaque in Athletes

The relationship between vigorous physical activity (PA) and the development of coronary atherosclerosis has remained less explored for many years. Recently, literature data have focused on coronary atherosclerosis in athletes showing that prevalence is not trivial, that there are differences among various types of sport, and that there are some peculiar features. As a matter of fact, plaque composition in athletes seems to be characterized by calcium rather than soft components. Specific mechanisms through which vigorous PA influences coronary artery disease are not yet fully understood. However, the prevalent calcific nature of coronary plaques in athletes could be related with a trend in a lower cardiovascular event rate

Cardiac conduction disorders in young adults: clinical characteristics and genetic background of an underestimated population

Background: Cardiac conduction disorders (CCD) in patients <50 years are a rare and mostly unknown condition. Objective: We aimed to assess clinical characteristics and genetic background of patients < 50 years with CCD of unknown origin. Methods: We retrospectively review a consecutive series of patients with a diagnosis of CCD before the age of 50 referred to our Centre between January 2019 and December 2021. Patients underwent complete clinical examination and genetic evaluation. Results: We enrolled 39 patients with a median age of 40 years (28-47 years) at the onset of symptoms. A cardiac implantable device (CIED) was implanted in 69% of the patients. In 15 out of 39 CCD index patients (38%), we found a total of 13 different gene variations (3 pathogenic, 6 likely pathogenic and 4 variants of uncertain significance), occurring mostly in three genes (SCN5A, TRPM4 and LMNA). In our cohort, genetic testing leads to the decision to implant an ICD in two patients for the increased risk of SCD. Conclusions: Patients with the occurrence of CCD before the age of 50 present a high rate of pathologic gene variations, occurring mostly in three genes (SCN5A, TRPM4 and LMNA). The presence of pathogenic variations may add information regarding the prognosis and lead to an individualized therapeutic approach