Renormalization view on resonance proliferation between many-body localized phases

Topology and many-body localization (MBL) have opened new avenues for preserving quantum information at finite energy density. Resonant delocalization plays a crucial role in destabilizing these phenomena. In this work, we study the statistical properties of many-body resonances in a disordered interacting Ising model - which can host symmetry protected topological order - using a Clifford circuit encoding of the real space renormalization group which allows the resonant properties of the wave functions to be efficiently characterized. Our findings show that both the trivial and topologically ordered MBL phases remain stable to the resonances, but in the vicinity of the transition between them localization is destabilized by resonance proliferation. Diverging susceptibility towards the development of an avalanche instability suggests an intervening ergodic phase. We are also able to access the local integrals of motion in the MBL phases and identify the topological edge-mode operators in the ordered phase. Our results have important implications for the stability of MBL and phase transitions between distinct MBL phases with and without symmetries.Comment: 13 pages, 11 figure

Occupational stress, work-home interference and burnout among Belgian veterinary practitioners

There have been few formal studies on stress in veterinary surgeons and, in the rare studies available, stress is not examined jointly through the levels of job strain and job engagement, the sources of stress in the issue of work environment and the work-home interference. The authors' goal in this study was to analyse job engagement, job strain, burnout, work-home interference and job stress factors among 216 Belgian veterinary surgeons. Rural practice was compared to small animal and mixed activity. The mean job strain and job engagement level in veterinary surgeons was not higher than what we found in other working populations. However, 15.6% of the group were found to be suffering from high burnout. Rural practitioners had a lower level of job engagement than small animal veterinary surgeons. These small animal practitioners had a lower level of job strain than the mixed practitioners. The level of burnout did not differ significantly across the three types of activity. In comparison to other Belgian and Dutch workers, veterinary surgeons perceived more negative work-home interference. Bovine and mixed practitioners were the most concerned with this problem. The two most important sources of stress reported by bovine practitioners were relations to farmers and working time management (including emergencies and availability)

Trends in exposure of veterinarians to physical and chemical hazards and use of protection practices

Objectives: To determine whether exposure to physical and chemical occupational hazards and use of protective practices has changed in recent veterinary graduates, and to describe trends in exposure to occupational hazards and use of protective practices over time. Methods: This paper reports on a retrospective cohort study of veterinarians who graduated from any of the four Australian veterinary schools between 1960 and 2000 and were currently in clinical practice. A self-completed postal questionnaire was used to collect personal details, professional history since graduation, and details of occupational hazards and protective practices used. The prevalence of occupational hazards and use of protective practices was examined by decade of graduation adjusting for gender, type of practice and number of hours worked. Results: After adjusting for other factors, recent graduates tended to take more X-rays than early graduates-graduates since 1990 were 2.59 times more likely to take more than seven X-rays a week compared with graduates before 1970. Recent graduates were also more likely to personally restrain animals during X-rays but were more likely to use X-ray protection. Of those who undertook surgery, recent graduates were more likely to use anaesthetic waste gas scavengers. Over time, veterinary jobs have become more likely to involve longer hours of surgery, but shorter periods of driving. The use of scavengers for waste anaesthetic gas has increased markedly over time from 3.8% of jobs commencing in the 1960s to over 70% for jobs commencing since 1997. Conclusions: This survey is, to our knowledge, the first to examine trends in the occupational health and safety practices of veterinarians. We have shown that occupational health issues are still important in veterinary practice, with most veterinarians exposed to a number of physical and chemical hazards and many using inadequate protection