Detecting Entanglement from Macroscopic Measurements of the Electric Field and Its Fluctuations.

To address the outstanding task of detecting entanglement in large quantum systems, entanglement witnesses have emerged, addressing the separable nature of a state. Yet optimizing witnesses, or accessing them experimentally, often remains a challenge. We here introduce a family of entanglement witnesses for open quantum systems. Based on the electric field, it does not require state tomography or single-site addressing, but rather macroscopic measurements of the field quadratures and of the total fluorescence. Its efficiency is demonstrated by detecting, from almost any direction, the entanglement of collective single-photon states, such as long-lived states generated by cooperative spontaneous emission. Able to detect entanglement in large open quantum systems, and through a single continuous measurement if operating in the stationary regime, these electric-field-based witnesses can be used on any set of emitters described by the Pauli group, such as atomic systems (cold atoms and trapped ions), giant atoms, color centers, and superconducting qubits.

1H NMR spectroscopy as a tool to probe potential biomarkers of the drying-salting process: A proof-of-concept study with the Amazon fish pirarucu.

Dry-salted pirarucu (Arapaima gigas) plays an important cultural role in the Amazon region - South America. In this study, we explored the changes in the chemical composition of pirarucu meat following the drying-salting process via 1H NMR spectroscopy. Combining multivariate and univariate statistical analyses yielded a robust differentiation of metabolites involved in the process. VIP score (>1), p-value (<0.05), and AUC (>0.7) were considered to selecting compounds that had significant fluctuations in their contents along the process. Our results pointed out acetate, lactate, succinate, and creatinine as metabolites undergoing significant changes during the drying-salting process. Creatinine was not detected in fresh samples. The investigation of multiple components delves deeper into the molecular nuances of the salting-drying process's impact on fish meat, providing a more comprehensive understanding of the possible chemical transformations and how the matrix's quality control and nutritional aspects should be addressed.

Microstructural brain abnormalities, fatigue, and cognitive dysfunction after mild COVID-19.

Although some studies have shown neuroimaging and neuropsychological alterations in post-COVID-19 patients, fewer combined neuroimaging and neuropsychology evaluations of individuals who presented a mild acute infection. Here we investigated cognitive dysfunction and brain changes in a group of mildly infected individuals. We conducted a cross-sectional study of 97 consecutive subjects (median age of 41 years) without current or history of psychiatric symptoms (including anxiety and depression) after a mild infection, with a median of 79 days (and mean of 97 days) after diagnosis of COVID-19. We performed semi-structured interviews, neurological examinations, 3T-MRI scans, and neuropsychological assessments. For MRI analyses, we included a group of non-infected 77 controls. The MRI study included white matter (WM) investigation with diffusion tensor images (DTI) and functional connectivity with resting-state functional MRI (RS-fMRI). The patients reported memory loss (36%), fatigue (31%) and headache (29%). The quantitative analyses confirmed symptoms of fatigue (83% of participants), excessive somnolence (35%), impaired phonemic verbal fluency (21%), impaired verbal categorical fluency (13%) and impaired logical memory immediate recall (16%). The WM analyses with DTI revealed higher axial diffusivity values in post-infected patients compared to controls. Compared to controls, there were no significant differences in the functional connectivity of the posterior cingulum cortex. There were no significant correlations between neuropsychological scores and neuroimaging features (including DTI and RS-fMRI). Our results suggest persistent cognitive impairment and subtle white matter abnormalities in individuals mildly infected without anxiety or depression symptoms. The longitudinal analyses will clarify whether these alterations are temporary or permanent.

Chromosomal characterization of three species of Serrasalmini (Serrasalmidae: Characiformes).

The tribe Serrasalmini is a diverse group with paraphyletic genera and taxonomic uncertainties. Several studies have been carried out in this group of fish in order to understand this problem, including the cytogenetic approach. In this study, three species of a clade of Serrasalmini were characterized cytogenetically - Pristobrycon striolatus, Catoprion absconditus and Pygopristis denticulatus. The three species presented diploid number (2n) equal to 62 chromosomes, of one and two arms, with karyotypic formulas and species-specific fundamental numbers. Heterochromatin is centromeric and terminal (bi-telomeric) in most chromosomes, with a conspicuous interstitial block at pair 1 (m) in all three species. The nucleolar organizer regions were multiple and C-band positive, and their location was confirmed via 18S ribosomal DNA mapping; however, with additional sites. The 5S rDNA was located in interstitial region of long arm of pair 1 (m), in the three species (homeologous). Moreover, we observed synteny between 18S and 5S in the species C. absconditus and P. denticulatus, which, according to fiber-FISH, are interspersed. Thus, the maintenance of 2n (62) evidences the diversification of chromosomal formulas within the clade by non-Robertsonian rearrangements and reflects the paraphyly of the related species.

Generation of Maximally Entangled Long-Lived States with Giant Atoms in a Waveguide.

In this Letter, we show how to efficiently generate entanglement between two artificial giant atoms with photon-mediated interactions in a waveguide. Taking advantage of the adjustable decay processes of giant atoms into the waveguide and of the interference processes, spontaneous sudden birth of entanglement can be strongly enhanced with giant atoms. Highly entangled states can also be generated in the steady-state regime when the system is driven by a resonant classical field. We show that the statistics of the light emitted by the system can be used as a witness of the presence of entanglement in the system, since giant photon bunching is observed close to the regime of maximal entanglement. Given the degree of quantum correlations incoherently generated in this system, our results open a broad avenue for the generation of quantum correlations and manipulation of photon statistics in systems of giant atoms.

NMR spectroscopy spotlighting immunogenicity induced by COVID-19 vaccination to mitigate future health concerns.

In this review, the disease and immunogenicity affected by COVID-19 vaccination at the metabolic level are described considering the use of nuclear magnetic resonance (NMR) spectroscopy for the analysis of different biological samples. Consistently, we explain how different biomarkers can be examined in the saliva, blood plasma/serum, bronchoalveolar-lavage fluid (BALF), semen, feces, urine, cerebrospinal fluid (CSF) and breast milk. For example, the proposed approach for the given samples can allow one to detect molecular biomarkers that can be relevant to disease and/or vaccine interference in a system metabolome. The analysis of the given biomaterials by NMR often produces complex chemical data which can be elucidated by multivariate statistical tools, such as PCA and PLS-DA/OPLS-DA methods. Moreover, this approach may aid to improve strategies that can be helpful in disease control and treatment management in the future.

Quantum advantage of two-level batteries in the self-discharging process.

Devices that use quantum advantages for storing energy in the degree of freedom of quantum systems have drawn attention due to their properties of working as quantum batteries (QBs). However, one can identify a number of problems that need to be adequately solved before the start of a real manufacturing process of these devices. In particular, it is important to pay attention to the ability of quantum batteries in storing energy when no consumption center is connected to them. In this paper, by considering quantum batteries disconnected from external charging fields and consumption center, we study the dissipative effects that lead to charge leakage to the surrounding environment. We identify this phenomena as a self-discharging of QBs, in analogy to the inherent decay of the stored charge of conventional classical batteries in a open-circuit configuration. The performance of QBs compared to the classical counterpart is highlighted for single- and multicell quantum batteries.

COVID-19 in Brazil: spatial risk, social vulnerability, human development, clinical manifestations and predictors of mortality - a retrospective study with data from 59 695 individuals.

Brazil ranks second in the number of confirmed cases of COVID-19 worldwide. In spite of this, coping measures differ throughout the national territory, as does the disease's impact on the population. This cross-sectional observational study, with 59 695 cases of COVID-19 registered in the state of Alagoas between March and August 2020, analysed clinical-epidemiological variables, incidence rate, mortality rate, case fatality rate (CFR) and the social indicators municipal human development index (MHDI) and social vulnerability index (SVI). Moran statistics and regression models were applied. Logistic regression analysis was applied to determine the predictors of death. The incidence rate was 1788.7/100 000 inhabitants; mortality rate was 48.0/100 000 and CFR was 2.7%. The highest incidence rates were observed in municipalities with better human development (overall MHDI (I = 0.1668; p = 0.002), education MHDI (I = 0.1649; p = 0.002) and income MHDI (I = 0.1880; p = 0.005)) and higher social vulnerability (overall SVI (I = 0.0599; p = 0.033)). CFR was associated with higher social vulnerability (SVI human capital (I = 0.0858; p = 0.004) and SVI urban infrastructure (I = 0.0985; p = 0.040)). Of the analysed cases, 55.4% were female; 2/3 were Black or Brown and the median age was 41 years. Among deaths, most were male (919; 57.4%) and elderly (1171; 73.1%). The predictors of death were male sex, advanced age and the presence of comorbidities. In Alagoas, Brazil, the disease has undergone a process of interiorisation and caused more deaths in poorer municipalities. The presence of comorbidities and advanced age were predictors of death.

Factors associated with stress, anxiety, and depression during social distancing in Brazil.

OBJECTIVE: To estimate the prevalence of clinical signs and symptoms of severe/extreme stress, anxiety, and depression, as well as their associated factors, among Brazilians during social distancing. METHODS: This is a cross-sectional study conducted in April/May 2020 with 3,200 Brazilians over 18 years old. Respondents' sociodemographic and clinical data were collected using an online questionnaire, which also included the 21-item Depression, Anxiety and Stress Scale (DASS-21) to assess emotional symptoms. Unadjusted and adjusted prevalence ratios and their respective 95% confidence intervals were estimated using Poisson regression models with robust variance. RESULTS: Our results show the prevalence of severe/extreme stress was 21.5%, anxiety 19.4%, and depression 21.5%. In the final model, sociodemographic, clinical, and Covid-19-related factors were associated with severe/extreme stress, anxiety, and depression in Brazilians during social distancing due to the Covid-19 pandemic. We found the main factors associated with severe/extreme depression to be young women, brown, single, not religious, sedentary, presenting reduced leisure activities, history of anxiety and depression, increased medication use, and Covid-19 symptoms. CONCLUSION: This study may help develop and systematically plan measures aimed to prevent, early identify, and properly manage clinical signs and symptoms of stress, anxiety, and depression during the Covid-19 pandemic.

The testing for COVID-19 in symptomatic patients as a protective factor against stress, anxiety, and depression / Testagem para a COVID-19 em pacientes sintomáticos como fator protetivo contra estresse, ansiedade e depressão

Abstract Objectives: to determine the frequency of stress, anxiety, and depression symptoms in symptomatic patients for COVID-19. To evaluate the associated factors involved in these variants. Methods: between May/June of 2020, it was conducted a prospective cross-section study with symptomatic participants for COVID-19 (n=300). It was applied an online questionnaire and the DASS-21 to evaluate the mental health of participants. Results: it was observed that 28.6%, 29.7% and 27% of the participants showed severe/extreme levels symptoms of stress, anxiety, and depression, respectively. The testing for COVID-19 application had constituted a protective factor for the development of psychiatric morbidity, once it had shown significant association in the low frequencies of severe/extreme depression [Odds Ratio (OR)]= 0.26; p=0.002) and stress (OR=0.39; p=0.01). Conclusion: individuals that are symptomatic for COVID-19 are a vulnerable group that may present high symptomatology for depression, anxiety, and stress. The identification of psychiatric morbidity frequency and its associated factors may contribute for the development of mental health strategies aiming at the prevention and mitigation of psychological impact in COVID-19 symptomatic population during the pandemic.

Resumo Objetivos: determinar a frequência de sintomas de estresse, ansiedade e depressão em pacientes sintomáticos para COVID-19 e avaliar os fatores associados. Métodos: entre maio / junho de 2020, foi realizado um estudo transversal prospectivo com participantes sintomáticos para COVID-19 (n = 300). Foi aplicado um questionário online e o DASS-21 para avaliar a saúde mental dos participantes. Resultados: observou-se que 28,6%, 29,7% e 27% dos participantes apresentaram sintomas graves/extremos para estresse, ansiedade e depressão, respectivamente. A realização do teste para a COVID-19 constituiu-se como fator de proteção para o desenvolvimento de sintomatologia psíquica, uma vez que mostrou associação significativa nas baixas frequências de depressão grave/extrema [odds ratio (OR)]= 0,26; p=0,002) e de estresse (OR=0,39; p=0,01). Conclusão: os indivíduos sintomáticos para COVID-19 constituem um grupo vulnerável que podem apresentar elevada sintomatologia para depressão, ansiedade e estresse. A identificação da frequência de morbidade psiquiátrica e seus fatores associados podem contribuir para o desenvolvimento de estratégias de saúde mental visando a prevenção e mitigação do impacto psicológico na população sintomática de COVID-19 durante a pandemia.

Identification of flavonoids in Hymenaea martiana Hayne (Fabaceae) by HPLC-DAD-MSn analysis.

Hymenaea martiana is a native tree known in Brazil as 'jatobá' and used in folk medicine to treat pain and inflammation. The aim of this work was to identify the flavonoids present in the crude ethanolic extract and ethyl acetate fraction using HPLC-DAD and LC-MSn analysis. The ethanolic extract was partitioned to obtain the ethyl acetate fraction. The analysis of astilbin content also was carried out by HPLC analysis. HPLC-DAD-ESI/MSn analysis of the ethanolic extract and ethyl acetate fraction revealed the presence of eleven peaks in the chromatograms, and all these peaks were identified: taxifolin, eucryphin, astilbin and 3 diastereoisomers, engeletin and 2 diastereoisomers, quercitrin and 2,6,3',4'-tetrahydroxy-2-benzylcoumaran-3-one. The ethyl acetate fraction had a higher astilbin concentration (151.87 µg/mL) than the ethanolic extract (40.13 µg/mL). In conclusion, the species could be considered a good source of flavonoids, which can be related to the main chemotaxonomic markers for the genus Hymenaea.

Chemical composition, larvicidal and cytotoxic activity of Annona salzmannii (Annonaceae) seed oil

The seed oil of Annona salzmannii A. DC. was analyzed by GC-MS and 1H qNMR, revealing a mixture of unsaturated (80.5%) and saturated (18.7%) fatty acids. Linoleic (45.3%) and oleic (33.5%) acid were the major unsaturated fatty acids identified, while palmitic acid (14.3%) was the major saturated fatty acid. The larvicidal effects of A. salzmannii seed oil were evaluated against third-instar larvae of Aedes aegypti (Linn.). The oil exhibited moderate larvicidal activity, with a LC50 of 569.77 ppm (95% CI = 408.11 to 825.88 ppm). However, when the cytotoxic effects of the oil were evaluated, no expressive antiproliferative effects were observed in tumor cell lines B16-F10 (mouse melanoma), HepG2 (human hepatocellular carcinoma), K562 (human chronic myelocytic leukemia), HL-60 (human promyelocytic leukemia), and non-tumor cell line PBMC (peripheral blood mononuclear cells), with IC50 values > 50 µg·mL-1. This is the first study to evaluate the chemical composition, larvicidal and cytotoxic activity of A. salzmannii seed oil

Prevalência da dor em estudantes universitários: uma revisão sistemática / Prevalence of pain in university students: a systematic review

Objetivo: revisar estudos sobre a prevalência e os fatores relacionados a dor em estudantes universitários brasileiros. Métodos: revisão sistemática com registro na Prospero (CRD42020204197), de artigos publicados em periódicos nacionais e internacionais, nas bases Pubmed, Ebsco, Lilacs, Medline, Portal da BVS, Google Acadêmico e SciELO. Descritores: "Pain", "Chronic Pain", Students", "Students, Health Occupations" e "Universities". Incluídos: a) estudos observacionais; b) transversais; c) publicados em periódicos nacionais ou internacionais; d) redigidos em inglês ou português; e) desenvolvidos com acadêmicos, em instituições de ensino superior brasileiras; f) que tenham avaliado a prevalência e fatores relacionados a dor; g) Tais estudos deviam estar disponíveis na íntegra. Não foram realizadas restrições quanto ao período de publicação dos estudos. Excluídos: h) estudos que não relataram a metodologia aplicada para mensuração do desfecho; i) estudos com instrumentos que não avaliaram a dor como desfecho primário, posteriormente apresentando dados insuficientes para análise dos resultados; j) estudos com acadêmicos de outros países; e k) estudos com inconsistência dos dados relacionados a amostra e seus principais resultados. O risco de viés foi avaliado com a escala Downs and Black e a proposta por Hoy. Resultados: as buscas identificaram 67 artigos, contudo, após análise, 10 foram incluídos. Esses eram estudos transversais, publicados entre 2011 e 2019, sendo cinco deles da região Nordeste. A amostra totalizou 3.268 acadêmicos, sendo 68% mulheres. A prevalência da dor variou entre 14,4% e 98% e a dor crônica entre 11,5% e 59,7%. A maior percepção da dor autorrelatada foi de 4,12 ± 2,15. As principais queixas álgicas foram nas regiões de lombar e de membros superiores. Na análise metodológica, os estudos possuem moderado a alto risco de viés. Conclusões: por fim, as evidências indicam uma alta prevalência de dor, bem como sua cronificação em universitários. Contudo, estudos com adequado rigor metodológico ainda são necessários para a confirmação dos resultados apresentados.

Objective: to review studies on the prevalence and factors related to pain in Brazilian university students. Methods: systematic review with PROSPERO record (CRD42020204197), of articles published in national and international journals, in PUBMED, EBSCO, LILACS, MEDLINE, VHL Portal, Google Scholar and SciELO. Descriptors: "Pain", "Chronic Pain", Students "," Students, Health Occupations "and" Universities ". Included: a) Observational studies; b) transversal; c) published in national or international journals; d) written in English or Portuguese; e) developed with academics, in Brazilian higher education institutions; f) who have assessed the prevalence and factors related to pain; g) Such studies should be available in full. There were no restrictions on the period of publication of the studies. Excluded: h) studies that did not report the methodology applied to measure the outcome; i) studies with instruments that did not evaluate pain as a primary outcome, subsequently presenting insufficient data to analyze the results; j) studies with academics from other countries and k) studies with inconsistent data related to the sample and its main results. The risk of bias was assessed using the Downs and Black scale and proposed by Hoy. Results: searches identified 67 articles, however, after analysis 10 were included. These were cross-sectional studies, published between 2011 and 2019, 5 of them from the Northeast region. The sample totaled 3,268 students, 68% of whom were women. The prevalence of pain varied between 14.4% and 98% and chronic pain between 11.5% and 59.7%. The highest perception of self-reported pain was 4.12 ± 2.15. The main pain complaints were in the lower back and upper limbs. In the methodological analysis, studies have a moderate to high risk of bias. Conclusions: finally, the evidence indicates a high prevalence of pain, as well as its chronicity in university students. However, studies with adequate methodological rigor are still needed to confirm the results presented.

Factors associated with stress, anxiety, and depression during social distancing in Brazil

ABSTRACT OBJECTIVE To estimate the prevalence of clinical signs and symptoms of severe/extreme stress, anxiety, and depression, as well as their associated factors, among Brazilians during social distancing. METHODS This is a cross-sectional study conducted in April/May 2020 with 3,200 Brazilians over 18 years old. Respondents' sociodemographic and clinical data were collected using an online questionnaire, which also included the 21-item Depression, Anxiety and Stress Scale (DASS-21) to assess emotional symptoms. Unadjusted and adjusted prevalence ratios and their respective 95% confidence intervals were estimated using Poisson regression models with robust variance. RESULTS Our results show the prevalence of severe/extreme stress was 21.5%, anxiety 19.4%, and depression 21.5%. In the final model, sociodemographic, clinical, and Covid-19-related factors were associated with severe/extreme stress, anxiety, and depression in Brazilians during social distancing due to the Covid-19 pandemic. We found the main factors associated with severe/extreme depression to be young women, brown, single, not religious, sedentary, presenting reduced leisure activities, history of anxiety and depression, increased medication use, and Covid-19 symptoms. CONCLUSION This study may help develop and systematically plan measures aimed to prevent, early identify, and properly manage clinical signs and symptoms of stress, anxiety, and depression during the Covid-19 pandemic.

Peripheral nerve entrapments-rare causes of a common condition: case series.

Compressive syndromes of peripheral nerves both in the upper and lower limbs are part of daily clinical practice; however, the etiological diagnosis can be challenging and impact on the outcome of the patient. We report five cases with rare etiologies of nerve entrapments: one in the lower limb and four in the upper limbs with the final diagnosis made only during the operation. The patients evolved without post-operative complications and had good outcomes. This series includes the first report of sciatic compression by a lipoma in the popliteal fossa, two lipomas one with compression of infraclavicular brachial plexus and another with compressing the posterior interosseous nerve, and two reports of vascular lesions due to blunt traumas, which are also uncommon. This series adds to the literature more hypotheses of differential diagnoses in nerve entrapments, which is fundamental to surgical decisions and pre-operative planning-and perhaps most importantly prevents wrong diagnosis of idiopathic compressions, which would lead to a completely wrong approach and unfavorable outcomes.

Segurança e aplicação da plataforma vibratória em pacientes hospitalizados: uma revisão sistemática / Safety and application of the vibratory platform in hospitalized patients: a systematic review

Um curto período de hospitalização, se acompanhado de imobilidade, pode ser capaz de promover declínio das funções musculoesqueléticas, gerando impacto negativo na funcionalidade e qualidade de vida. Com isso, tem-se tornado cada vez mais comum a adoção de estratégias terapêuticas como o uso da plataforma vibratória (PV). OBJETIVO: Sistematizar evidências sobre a funcionalidade e a segurança da aplicação da PV em pacientes adultos hospitalizados. MÉTODOS: Revisão sistemática, registrada na PROSPERO com código CRD42019119672. Desenvolvida nas bases: LILACS, SciELO, MedLine/PubMed, EBSCOhost e PEDro. Descritores e palavras-chave: "Whole body vibration", "Intensive Care Units", "hospitalization", "muscle strenght", e "functional capacity". Incluídos estudos que analisaram os efeitos e a segurança da aplicação da PV em pacientes adultos hospitalizados. A qualidade metodológica foi avaliada através da escala Downs and Black. RESULTADOS: Incluídos 2 estudos, um ensaio clínico randomizado e outro estudo de intervenção controlado. A amostra variou entre 24 e 40 sujeitos, de ambos os sexos, média de idade 52±4 anos, com diagnóstico de DPOC e condições variadas. Houve uma melhora na distância percorrida no teste de caminhada de seis minutos e diminuição no tempo do teste de sentar e levantar, aumento dos níveis de irisina e melhora na qualidade de vida, em relação aos parâmetros dos sinais vitais não teve alterações significativas. O escore metodológico foi em média 16. CONCLUSÃO: Os resultados indicam que a PV parece ser viável e segura, podendo trazer efeitos favoráveis na funcionalidade para o tratamento em pacientes adultos hospitalizados, sendo uma alternativa para a reabilitação de forma precoce.

A short period of hospitalization, if accompanied by immobility, may be able to promote a decline in musculoskeletal functions, generating a negative impact on functionality and quality of life. As a result, the adoption of therapeutic strategies such as the use of the vibrating platform (PV) has become increasingly common. OBJECTIVE: To systematize evidence on the functionality and safety of the application of PV in hospitalized adult patients. METHODS: Systematic review, registered at PROSPERO with code CRD42019119672. Developed in the bases: LILACS, SciELO, MedLine / PubMed, EBSCOhost and PEDro. Keywords and keywords: "Whole body vibration", "Intensive Care Units", "hospitalization", "muscle strength", and "functional capacity". Included studies that analyzed the effects and safety of the application of PV in hospitalized adult patients. Methodological quality was assessed using the Downs and Black scale. RESULTS: Included 2 studies, a randomized clinical trial and another controlled intervention study. The sample varied between 24 and 40 subjects, of both sexes, mean age 52 ± 4 years, with a diagnosis of COPD and varied conditions. There was an improvement in the distance covered in the six-minute walk test and a decrease in the time of the sit and stand test, an increase in irisin levels and an improvement in quality of life, in relation to the vital signs parameters, there was no significant change. The methodological score was on average 16. CONCLUSION: The results indicate that PV seems to be viable and safe, and may have favorable effects on functionality for treatment in hospitalized adult patients, being an alternative for early rehabilitation.

Stable and charge-switchable quantum batteries.

A fully operational loss-free quantum battery requires an inherent control over the energy transfer process, with the ability of keeping the energy retained with no leakage. Moreover, it also requires a stable discharge mechanism, which entails that no energy revivals occur as the device starts its energy distribution. Here we provide a scalable solution for both requirements. To this aim, we propose a general design for a quantum battery based on an energy current (EC) observable quantifying the energy transfer rate to a consumption hub. More specifically, we introduce an instantaneous EC operator describing the energy transfer process driven by an arbitrary interaction Hamiltonian. The EC observable is shown to be the root for two main applications: (1) a trapping energy mechanism based on a common eigenstate between the EC operator and the interaction Hamiltonian, in which the battery can indefinitely retain its energy even if it is coupled to the consumption hub, and (2) an asymptotically stable discharge mechanism, which is achieved through an adiabatic evolution eventually yielding vanishing EC. These two independent but complementary applications are illustrated in quantum spin chains, where the trapping energy control is realized through Bell pairwise entanglement and the stability arises as a general consequence of the adiabatic spin dynamics.

Peripheral nerve entrapments - rare causes of a common condition: case series

Compressive syndromes of peripheral nerves both in the upper and lower limbs are part of daily clinical practice; however, the etiological diagnosis can be challenging and impact on the outcome of the patient. We report five cases with rare etiologies of nerve entrapments: one in the lower limb and four in the upper limbs with the final diagnosis made only during the operation. The patients evolved without post-operative complications and had good outcomes. This series includes the first report of sciatic compression by a lipoma in the popliteal fossa, two lipomas one with compression of infraclavicular brachial plexus and another with compressing the posterior interosseous nerve, and two reports of vascular lesions due to blunt traumas, which are also uncommon. This series adds to the literature more hypotheses of differential diagnoses in nerve entrapments, which is fundamental to surgical decisions and pre-operative planning—and perhaps most importantly prevents wrong diagnosis of idiopathic compressions, which would lead to a completely wrong approach and unfavorable outcomes.