Hearing the Shape of the Ising Model with a Programmable Superconducting-Flux Annealer

Two objects can be distinguished if they have different measurable properties. Thus, distinguishability depends on the Physics of the objects. In considering graphs, we revisit the Ising model as a framework to define physically meaningful spectral invariants. In this context, we introduce a family of refinements of the classical spectrum and consider the quantum partition function. We demonstrate that the energy spectrum of the quantum Ising Hamiltonian is a stronger invariant than the classical one without refinements. For the purpose of implementing the related physical systems, we perform experiments on a programmable annealer with superconducting flux technology. Departing from the paradigm of adiabatic computation, we take advantage of a noisy evolution of the device to generate statistics of low energy states. The graphs considered in the experiments have the same classical partition functions, but different quantum spectra. The data obtained from the annealer distinguish non-isomorphic graphs via information contained in the classical refinements of the functions but not via the differences in the quantum spectra.Comment: 13 pages, 10 figure

Disciplined into good conduct : Gender constructions of users in a municipal psychiatric context in Sweden

Aims and objectives To examine how gendered discursive norms and notions of masculinity and femininity were (re)produced in professional conversations about users of long‐term municipality psychiatric care. Focus is on the staff’s use of language in relation to gender constructions. Background Psychiatric care in Sweden has undergone tremendous changes in recent decades from custodian care in large hospitals to a care mainly located in a municipal context. People who need psychiatric care services often live in supporting houses. In municipal psychiatric care, staff conduct weekly professional meetings to discuss daily matters and the users’ needs. Official reports of the Swedish government have shown that staff in municipal care services treat disabled women and men differently. Studies exploring gender in relation to users of long‐term psychiatric care in municipalities have problematised the care and how staff, through language, construct users’ gender. Therefore, language used by staff is a central tool for ascribing different gender identities of users. Design The content of speech derived from audio recordings were analysed using Foucauldian discursive analysis. The COREQ checklist was used in this article. Results The results indicate that by relying on gender discourses, staff create a conditional care related to how the users should demonstrate good conduct. In line with that, an overall discourse was created: Disciplined into good conduct. It was underpinned by three discourses inherent therein: The unreliable drinker and the confession, Threatened dignity, Doing different femininities. Conclusion The community psychiatric context generates a discourse of conduct in which staff, via spoken language (re)produces gendered patterns and power imbalances as a means to manage daily work routines. Such practices of care, in which constant, nearly panoptic, control despite the intention to promote autonomy, urgently require problematising current definitions of good conduct and normality.Peer reviewe

Spontaneous singing and musical agency in the everyday home lives of three- and four-year-old children

Spontaneous singing permeates the lives of young children and can provide insights into the social and personal worlds of young children at home. Research into young children’s singing has traditionally been dominated by studies framed by developmental perspectives. However, developmental approaches run the risk of overlooking the ways in which spontaneous singing is useful and meaningful to young children. Despite increased interest in the musical lives of young children, there exists very little research into young children’s musical lives at home, largely because the home can be a difficult space to access for research purposes. This chapter is based on research undertaken from audio recordings of 15 3- and 4-year-old children who were recorded for continuous periods at home using all-day recording technology. I draw on ideas from music sociology and childhood studies to illustrate how children use singing as a tool of agency in their interactions with others and to manage their own experience