Ultrafast QND measurements based on diamond-shape artificial atom

We propose a Quantum Non Demolition (QND) read-out scheme for a superconducting artificial atom coupled to a resonator in a circuit QED architecture, for which we estimate a very high measurement fidelity without Purcell effect limitations. The device consists of two transmons coupled by a large inductance, giving rise to a diamond-shape artificial atom with a logical qubit and an ancilla qubit interacting through a cross-Kerr like term. The ancilla is strongly coupled to a transmission line resonator. Depending on the qubit state, the ancilla is resonantly or dispersively coupled to the resonator, leading to a large contrast in the transmitted microwave signal amplitude. This original method can be implemented with state of the art Josephson parametric amplifier, leading to QND measurements in a few tens of nanoseconds with fidelity as large as 99.9 %.Comment: 5 pages, 4 figure

Helicoidal Fields and Spin Polarized Currents in CNT-DNA Hybrids

We report on theoretical studies of electronic transport in the archetypical molecular hybrid formed by DNA wrapped around single-walled carbon nanotubes (CNTs). Using a Green's function formalism in a $\pi$-orbital tight-binding representation, we investigate the role that spin-orbit interactions play on the CNT in the case of the helicoidal electric field induced by the polar nature of the adsorbed DNA molecule. We find that spin polarization of the current can take place in the absence of magnetic fields, depending strongly on the direction of the wrapping and length of the helicoidal field. These findings open new routes for using CNTs in spintronic devices.Comment: 4 pages, 5 figure

Classism and dehumanization in chronic pain: a qualitative study of nurses inferences about women of different socio-economic status

Objectives: Class-based dehumanization in health is poorly investigated. Beliefs about social class are often shared across cultures, with people of lower socio-economic status (SES) being typically dehumanized. This study specifically examined how nurses’ perceptions of pain patients’ SES were associated with (more or less) dehumanizing inferences about their pain and different treatment recommendations. Design: Sequential mixed methods including Similitude Analysis (statistical analysis of qualitative data) and a Thematic Analysis. Fifty female nurses watched short videos of two white women of different SES (low vs. middle) and similar levels of pain behaviours. Afterwards, nurses were asked to complete (1) a Free Association Task (associating characteristics and a profession to the women) and (2) a Story-Completion Task (writing a story describing women's lives, pain, and recommending treatments). Data were analysed with Similitude and Thematic Analysis. Results: The women's SES was recognized, linked to distinct professions, and associated with distinct inferences. The middle-SES woman was depicted with both Uniquely Human (e.g., autonomous) and Human Nature (e.g., communicative) traits, positive future prospects, and competence to self-manage pain. The low-SES woman was associated with Human Nature traits (hard-working) but denied Uniquely Human traits associated with competence; she was imagined as passive towards pain, with poor future prospects and referred to psychoeducation. Conclusion: Findings reveal the role of class-based cultural belief systems in pain care, showing how nurses’ recognition of low SES is associated with dehumanizing inferences and recommendations, which may contribute to reproducing pain care disparities. Theoretical implications of these findings for social and health psychology are drawn. Statement of contribution What is already known on the subject? • Psychosocial research on health and pain care disparities has paid more attention to the role of race/racism and gender/sexism than the role of social class/classism; Belief systems about social class are shared across cultures; people from lower SES are often dehumanized by being denied competence, civility, and self-determination; Class-based dehumanization may influence the relational and technical aspects of clinical encounters but little is still known about these processes. What does this study add? Drawing upon a mixed-methods approach, this study provides novel findings on class-based dehumanization inferences made by female nurses on female chronic pain patients; Nurses perceived the lower SES patient with fewer Uniquely Human traits, that is, less competent, with more pain-related disability, and recommended her more psychoeducation. Class-based dehumanization processes may contribute to reproducing pain care disparities and may prove to be important targets for intervention development.info:eu-repo/semantics/acceptedVersio

Integral Field Spectroscopy of the inner kpc of the elliptical galaxy NGC 5044

We used Gemini Multi-Object Spectrograph (GMOS) in the Integral Field Unit mode to map the stellar population, emission line flux distributions and gas kinematics in the inner kpc of NGC 5044. From the stellar populations synthesis we found that the continuum emission is dominated by old high metallicity stars ($\sim$13 Gyr, 2.5Z$\odot$). Also, its nuclear emission is diluted by a non thermal emission, which we attribute to the presence of a weak active galactic nuclei (AGN). In addition, we report for the first time a broad component (FWHM$\sim$ 3000km$s^{-1}$) in the H$\alpha$ emission line in the nuclear region of NGC 5044. By using emission line ratio diagnostic diagrams we found that two dominant ionization processes coexist, while the nuclear region (inner 200 pc) is ionized by a low luminosity AGN, the filamentary structures are consistent with being excited by shocks. The H$\alpha$ velocity field shows evidence of a rotating disk, which has a velocity amplitude of $\sim$240kms$^{-1}$ at $\sim$ 136 pc from the nucleus. Assuming a Keplerian approach we estimated that the mass inside this radius is $1.9\times10^9$ $M_{\odot}$, which is in agreement with the value obtained through the M-$\sigma$ relation, $M_{SMBH}=1.8\pm1.6\times10^{9}M_{\odot}$. Modelling the ionized gas velocity field by a rotating disk component plus inflows towards the nucleus along filamentary structures, we obtain a mass inflow rate of $\sim$0.4 M$_\odot$. This inflow rate is enough to power the central AGN in NGC 5044.Comment: 16 pages, 12 figures, accepted by MNRA

Planejamento da atividade leiteira: sugestões para os produtores iniciantes.

bitstream/item/65443/1/COT-56-Planejamento-da-atividade.pd