Metrics for Two Electron Random Potential Systems

Metrics have been used to investigate the relationship between wavefunction distances and density distances for families of specific systems. We extend this research to look at random potentials for time-dependent single-electron systems, and for ground-state two-electron systems. We find that Fourier series are a good basis for generating random potentials. These random potentials also yield quasi-linear relationships between the distances of ground-state densities and wavefunctions, providing a framework in which density functional theory can be explored

Many-body effects on the thermodynamics of closed quantum systems

Thermodynamics of quantum systems out-of-equilibrium is very important for the progress of quantum technologies, however, the effects of many body interactions and their interplay with temperature, different drives and dynamical regimes is still largely unknown. Here we present a systematic study of these interplays: we consider a variety of interaction (from non-interacting to strongly correlated) and dynamical (from sudden quench to quasi-adiabatic) regimes, and draw some general conclusions in relation to work extraction and entropy production. As treatment of many-body interacting systems is highly challenging, we introduce a simple approximation which includes, for the average quantum work, many-body interactions only via the initial state, while the dynamics is fully non-interacting. We demonstrate that this simple approximation is surprisingly good for estimating both the average quantum work and the related entropy variation, even when many-body correlations are significant.Comment: 17 pages, 11 figure

Practices of negotiating responsibility for troubles in interaction involving people with hearing impairment

For people with hearing impairment (HI), the need to repair hearing-related troubles within conversation is a constant concern that can significantly impact their everyday life and social relationships. This chapter examines repair sequences initiated by people with HI within two corpora, one comprising video-recorded interaction in audiology appointments, the other, audio-recorded interaction between adults with HI and a chosen familiar conversation partner. In particular, the analysis explores the person with HI’s use of meta-comments (“I can’t hear you”, “you’re mumbling”) in the repair sequences to negotiate responsibility for the hearing trouble between the speakers. The findings highlight that the person with HI has an expectation that their communication partners will adapt their talk for the HI recipient to aid the progress of the conversation