Velocity-dependent quantum phase slips in 1D atomic superfluids

Quantum phase slips are the primary excitations in one-dimensional superfluids and superconductors at low temperatures but their existence in ultracold quantum gases has not been demonstrated yet. We now study experimentally the nucleation rate of phase slips in one-dimensional superfluids realized with ultracold quantum gases, owing along a periodic potential. We observe a crossover between a regime of temperature-dependent dissipation at small velocity and interaction and a second regime of velocity-dependent dissipation at larger velocity and interaction. This behavior is consistent with the predicted crossover from thermally-assisted quantum phase slips to purely quantum phase slips.Comment: 7 pages, 6 figure

Observation of a disordered bosonic insulator from weak to strong interactions

We employ ultracold atoms with controllable disorder and interaction to study the paradigmatic problem of disordered bosons in the full disorder-interaction plane. Combining measurements of coherence, transport and excitation spectra, we get evidence of an insulating regime extending from weak to strong interaction and surrounding a superfluid-like regime, in general agreement with the theory. For strong interaction, we reveal the presence of a strongly-correlated Bose glass coexisting with a Mott insulator

\u201cI go into crisis when \u2026\u201d: ethics of care and moral dilemmas in palliative care

Background: Recognising and knowing how to manage ethical issues and moral dilemmas can be considered an ethical skill. In this study, ethics of care is used as a theoretical framework and as a regulatory criterion in the relationship among healthcare professionals, patients with palliative care needs and family members. This study is a part of a larger project aimed at developing and implementing a training programme on \u201cethical communication\u201d addressed to professionals caring for patients with palliative care needs. The aim of this study was comprehending whether and how the ethics of care informs the way healthcare professionals make sense of and handle ethical issues in palliative care. Methods: Qualitative study employing a theoretically driven thematic analysis performed on semi-structured interviews. The research was conducted in a clinical cancer centre in northern Italy. Eligible participants were physicians and nurses from eleven hospital wards who assisted patients with chronic advanced disease daily and had previously attended a 4-h training on palliative care held by the hospital Palliative Care Unit. Results: The researchers identified five themes: morality is providing global care; morality is knowing how to have a relationship with patients; morality is recognizing moral principles; moral dimension and communication; and moral dilemmas are individual conflicts. Conclusions: Ethics of care seems to emerge as a theoretical framework that includes the belief systems of healthcare professionals, especially those assisting patients with palliative care needs; moreover, it allows the values of both the patients and professionals to come to light through the relationship of care. Ethics of care is also appropriate as a framework for ethical training

Palliative care training addressed to hospital healthcare professionals by palliative care specialists: a mixed-method evaluation

Despite the great advances in the concept of palliative care (PC) and its benefits, its application seems to be delayed, leaving unfulfilled the many needs of patients and family members. One way to overcome this difficulty could be to develop a new training programme by palliative care specialists to improve PC primary skills in healthcare professionals. The aim of this study was to evaluate the training's impact on trainees within a hospital setting using Kirkpatrick's and Moore's models