Generation of quantum states with nonlinear squeezing by Kerr nonlinearity.

In quantum optics, squeezing corresponds to the process in which fluctuations of a quadrature operator are reduced below the shot noise limit. In turn, nonlinear squeezing can be defined as reduction of fluctuations related to nonlinear combination of quadrature operators. Quantum states with nonlinear squeezing are a necessary resource for deterministic implementation of high-order quadrature phase gates that are, in turn, sufficient for advanced quantum information processing. We demonstrate that this class of states can be deterministically prepared by employing a single self-Kerr gate accompanied by suitable Gaussian processing. The required Kerr coupling depends on the energy of the initial system and can be made arbitrarily small. We also employ numerical simulations to analyze the effects of imperfections and to show to which extent can they be neglected.

Physician Satisfaction in Treating Medically Unexplained Symptoms.

OBJECTIVES: To determine whether treating conditions having medically unexplained symptoms is associated with lower physician satisfaction and higher ascribed patient responsibility, and to determine whether higher ascribed patient responsibility is associated with lower physician satisfaction in treating a given condition. METHODS: We surveyed a nationally representative sample of 1504 US primary care physicians. Respondents were asked how responsible patients are for two conditions with more-developed medical explanations (depression and anxiety) and two conditions with less-developed medical explanations (chronic back pain and fibromyalgia), and how much satisfaction they experienced in treating each condition. We used Wald tests to compare mean satisfaction and ascribed patient responsibility between medically explained conditions and medically unexplained conditions. We conducted single-level and multilevel ordinal logistic models to test the relation between ascribed patient responsibility and physician satisfaction. RESULTS: Treating medically unexplained conditions elicited less satisfaction than treating medically explained conditions (Wald P < 0.001). Physicians attribute significantly more patient responsibility to the former (Wald P < 0.005), although the magnitude of the difference is small. Across all four conditions, physicians reported experiencing less satisfaction when treating symptoms that result from choices for which patients are responsible (multilevel odds ratio 0.57, P = 0.000). CONCLUSIONS: Physicians experience less satisfaction in treating conditions characterized by medically unexplained conditions and in treating conditions for which they believe the patient is responsible.

US primary care physicians' opinions about conscientious refusal: a national vignette experiment.

OBJECTIVE: Previous research has found that physicians are divided on whether they are obligated to provide a treatment to which they object and whether they should refer patients in such cases. The present study compares several possible scenarios in which a physician objects to a treatment that a patient requests, in order to better characterise physicians' beliefs about what responses are appropriate. DESIGN: We surveyed a nationally representative sample of 1504 US primary care physicians using an experimentally manipulated vignette in which a patient requests a clinical intervention to which the patient's physician objects. We used multivariate logistic regression models to determine how vignette and respondent characteristics affected respondent's judgements. RESULTS: Among eligible respondents, the response rate was 63% (896/1427). When faced with an objection to providing treatment, referring the patient was the action judged most appropriate (57% indicated it was appropriate), while few physicians thought it appropriate to provide treatment despite one's objection (15%). The most religious physicians were more likely than the least religious physicians to support refusing to accommodate the patient's request (38% vs 22%, OR=1.75; 95% CI 1.06 to 2.86). CONCLUSIONS: This study indicates that US physicians believe it is inappropriate to provide an intervention that violates one's personal or professional standards. Referring seems to be physicians' preferred way of responding to requests for interventions to which physicians object.

COVID-19 Stress and Cognitive Disparities in Black, MENA and White Older Adults.

BACKGROUND AND OBJECTIVES: Population aging has led to an increased interest in cognitive health, and, in particular, the role that stress plays in cognitive disparities. This paper extends previous work by characterizing COVID-19 stress type prevalence and its association with cognitive health in metro-Detroit among Black, Middle Eastern/Arab (MENA) and White older adults. RESEARCH DESIGN AND METHODS: Data come from a regionally representative sample of adults aged 65+ in metro-Detroit (N=600; MENA n=199; Black n=205; White n=196). We used Generalized Linear Models (GLMs) to compare groups on socio-demographic, objective stress, and social stress indicators. Multiple group structural equation models (SEMs) evaluated whether COVID-19 stress predicted cognitive health and whether that association varied across racial/ethnic groups. RESULTS: MENA and Black older adults reported higher levels of objective stress than Whites. There were no racial/ethnic group differences in social stress. More objective stress was associated with better cognitive health, and more social stress was associated with worse cognitive health. The positive effect of objective stress was especially apparent for White older adults. DISCUSSION AND IMPLICATIONS: Though it appears that minority stress was not exacerbated in the context of pandemic stress, links between greater objective stress and better cognitive health apparent among White older adults was not evident among MENA or Black older adults. Broadening health disparities research by including underrepresented populations allows us to elevate scientific knowledge by clarifying what is universal and what is unique about the stress process.

Longitudinal Associations Between Loneliness and Self-Rated Health Among Black and White Older Adults.

OBJECTIVES: This study examined the longitudinal association between loneliness and self-rated health (SRH), and whether there were race differences between non-Hispanic Black and White adults in these associations. METHOD: A total of 1,407 participants were drawn Social Relations Study, a regional study of social relations across the life span with 3 waves of data collection in 1992, 2005, and 2015 (Wave 1, W1: Mage = 50.28, 28% Black, 59% women). Cross-lagged structural equation models examined the association between loneliness and SRH over 3 waves. We adjusted for baseline age, gender, social network size, and depressive symptoms. RESULTS: There were no race differences in loneliness at any wave. Loneliness W1 was associated with Loneliness W2; Loneliness W2 was associated with Loneliness W3. We had similar findings for associations among SRH. However, only one of the cross-lagged paths was significant. Worse SRH W2 was associated with more Loneliness W3. The only path that varied across race was in the association between SRH W2 and Loneliness W3, and this path was significant only in Whites. DISCUSSION: Findings indicate that worse SRH at later midlife may increase risk for loneliness in later life, particularly for Whites. As a valid indicator of health, SRH can be used in the body of research on health correlates of loneliness as adults age. Use of the current sample of Black and White adults provides nuanced understanding in the ways in which racially diverse adults experience loneliness and should be useful in refining and developing culturally competent interventions for older adults.

Measurement and structural invariance of a neuropsychological battery among Middle Eastern/North African, Black, and White older adults.

OBJECTIVE: There is a lack of guidance on common neuropsychological measures among Arabic speakers and individuals who identify as Middle Eastern/North African (MENA) in the United States. This study evaluated measurement and structural invariance of a neuropsychological battery across race/ethnicity (MENA, Black, White) and language (Arabic, English). METHOD: Six hundred six older adults (128 MENA-English, 74 MENA-Arabic, 207 Black, 197 White) from the Detroit Area Wellness Network were assessed via telephone. Multiple-group confirmatory factor analyses examined four indicators corresponding to distinct cognitive domains: episodic memory (Consortium to Establish a Registry for Alzheimer's Disease [CERAD] Word List), language (Animal Fluency), attention (Montreal Cognitive Assessment [MoCA] forward digit span), and working memory (MoCA backward digit span). RESULTS: Measurement invariance analyses revealed full scalar invariance across language groups and partial scalar invariance across racial/ethnic groups suggesting a White testing advantage on Animal Fluency; yet this noninvariance did not meet a priori criteria for salient impact. Accounting for measurement noninvariance, structural invariance analyses revealed that MENA participants tested in English demonstrated lower cognitive health than Whites and Blacks, and MENA participants tested in Arabic demonstrated lower cognitive health than all other groups. CONCLUSIONS: Measurement invariance results support the use of a rigorously translated neuropsychological battery to assess global cognitive health across MENA/Black/White and Arabic/English groups. Structural invariance results reveal underrecognized cognitive disparities. Disaggregating MENA older adults from other non-Latinx Whites will advance research on cognitive health equity. Future research should attend to heterogeneity within the MENA population, as the choice to be tested in Arabic versus English may reflect immigrant, educational, and socioeconomic experiences relevant to cognitive aging. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Nonlinear coherent heat machines.

We propose heat machines that are nonlinear, coherent, and closed systems composed of few field (oscillator) modes. Their thermal-state input is transformed by nonlinear Kerr interactions into nonthermal (non-Gaussian) output with controlled quantum fluctuations and the capacity to deliver work in a chosen mode. These machines can provide an output with strongly reduced phase and amplitude uncertainty that may be useful for sensing or communications in the quantum domain. They are experimentally realizable in optomechanical cavities where photonic and phononic modes are coupled by a Josephson qubit or in cold gases where interactions between photons are transformed into dipole-dipole interacting Rydberg atom polaritons. This proposed approach is a step toward the bridging of quantum and classical coherent and thermodynamic descriptions.

Physicians' Religious Characteristics and Their Perceptions of the Psychological Impact of Patient Prayer and Beliefs at the End of Life: A National Survey.

BACKGROUND:: Physicians who are more religious or spiritual may report more positive perceptions regarding the link between religious beliefs/practices and patients' psychological well-being. METHODS:: We conducted a secondary data analysis of a 2010 national survey of US physicians from various specialties (n = 1156). Respondents answered whether the following patient behaviors had a positive or negative effect on the psychological well-being of patients at the end of life: (1) praying frequently, (2) believing in divine judgment, and (3) expecting a miraculous healing. We also asked respondents how comfortable they are talking with patients about death. RESULTS:: Eighty-five percent of physicians believed that patients' prayer has a positive psychological impact, 51% thought that patients' belief in divine judgment has a positive psychological impact, and only 17% of physicians thought the same with patients' expectation of a miraculous healing. Opinions varied based on physicians' religious and spiritual characteristics. Furthermore, 52% of US physicians appear to feel very comfortable discussing death with patients, although end-of-life specialists, Hindu physicians, and spiritual physicians were more likely to report feeling very comfortable discussing death (adjusted odds ratio range: 1.82-3.00). CONCLUSION:: US physicians hold divided perceptions of the psychological impact of patients' religious beliefs/practices at the end of life, although they more are likely to believe that frequent prayer has a positive psychological impact for patients. Formal training in spiritual care may significantly improve the number of religion/spirituality conversations with patients at the end of life and help doctors understand and engage patients' religious practices and beliefs.

Physician Decision-Making in the Setting of Advanced Illness: An Examination of Patient Disposition and Physician Religiousness.

CONTEXT: Little is known about patient and physician factors that affect decisions to pursue more or less aggressive treatment courses for patients with advanced illness. OBJECTIVES: This study sought to determine how patient age, patient disposition, and physician religiousness affect physician recommendations in the context of advanced illness. METHODS: A survey was mailed to a stratified random sample of U.S. physicians, which included three vignettes depicting advanced illness scenarios: 1) cancer, 2) heart failure, and 3) dementia with acute infection. One vignette included experimental variables to test how patient age and patient disposition affected physician recommendations. After each vignette, physicians indicated their likelihood to recommend disease-directed medical care vs. hospice care. RESULTS: Among eligible physicians (n = 1878), 62% (n = 1156) responded. Patient age and stated patient disposition toward treatment did not significantly affect physician recommendations. Compared with religious physicians, physicians who reported that religious importance was "not applicable" were less likely to recommend chemotherapy (adjusted odds ratio [OR] 0.39, 95% CI 0.23-0.66) and more likely to recommend hospice (OR 1.90, 95% CI 1.15-3.16) for a patient with cancer. Compared with physicians who ever attended religious services, physicians who never attended were less likely to recommend left ventricular assist device placement for a patient with congestive heart failure (OR 0.57, 95% CI 0.35-0.92). In addition, Asian ethnicity was independently associated with recommending chemotherapy (OR 1.72, 95% CI 1.13-2.61) and being less likely to recommend hospice (OR 0.59, 95% CI 0.40-0.91) for the patient with cancer; and it was associated with recommending antibiotics for the patient with dementia and pneumonia (OR 1.64, 95% CI 1.08-2.50). CONCLUSION: This study provides preliminary evidence that patient disposition toward more and less aggressive treatment in advanced illness does not substantially factor into physician recommendations. Non-religious physicians appear less likely to recommend disease-directed medical treatment in the setting of advanced illness, although this finding was not uniform and deserves further research.