Publications by authors named "Bengtsson A"

Quantum error correction (QEC) provides a practical path to fault-tolerant quantum computing through scaling to large qubit numbers, assuming that physical errors are sufficiently uncorrelated in time and space. In superconducting qubit arrays, high-energy impact events can produce correlated errors, violating this key assumption. Following such an event, phonons with energy above the superconducting gap propagate throughout the device substrate, which in turn generate a temporary surge in quasiparticle (QP) density throughout the array.

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Article Synopsis
  • * It addresses the challenges these individuals face in accessing outdoor spaces, despite research highlighting their benefits, and presents two case studies that illustrate effective approaches to improve outdoor environments.
  • * An interdisciplinary team proposes six actionable recommendations to enhance outdoor experiences for older adults in RCFs, aiming for equitable conditions and better overall quality of life.
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This qualitative study aimed to explore needs and wishes of older adults concerning their perceived need for contact with outdoor environments at residential care facilities (RCFs) and what implications it has for theory and practice. There is increased awareness of the importance of health-promoting everyday environments for persons with special needs. Therefore, it is important to include the experiences of older adults at RCFs in research.

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Purpose: Pancreatic ductal adenocarcinoma (PDAC) can be classified into distinct histological subtypes based on the WHO nomenclature. The aim of this study was to compare the prognosis of conventional PDAC (cPDAC) against the other histological variants at the population level.

Methods: The Surveillance, Epidemiology and End Results (SEER) database was used to identify patients with microscopically confirmed PDAC.

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Undesired coupling to the surrounding environment destroys long-range correlations in quantum processors and hinders coherent evolution in the nominally available computational space. This noise is an outstanding challenge when leveraging the computation power of near-term quantum processors. It has been shown that benchmarking random circuit sampling with cross-entropy benchmarking can provide an estimate of the effective size of the Hilbert space coherently available.

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  • This study investigates the genetics behind systemic inflammatory autoimmune diseases (SIADs), like systemic lupus erythematosus, primary Sjögren's disease, and myositis, which share similar autoantibodies and symptoms.
  • Researchers sequenced DNA from immune-related genes in over 2,200 Scandinavian patients and 1,200 controls to identify genetic variants connected to these diseases.
  • Findings revealed both known and new genetic loci associated with SIADs and highlighted that different patient subgroups have distinct genetic traits, influencing their clinical features and possibly leading to anti-inflammatory effects related to skin manifestations.
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Health-promoting outdoor environments designed for people living with dementia (PLwD) has proved to be an effective non-pharmacological intervention for treatment of symptoms and improved well-being. However, for individuals with Young-Onset Dementia (YOD), who have particular symptoms and needs, the content and design of these environments are underexplored. This study aimed to explore the needs of individuals with YOD in a garden setting, to generate design-related knowledge for 'dementia-friendly' outdoor environments, while contributing to the field of Evidence-Based Design (EBD).

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Introduction: Little is known of the processes that trigger neutrophil activation in the joint of patients with oligoarticular juvenile idiopathic arthritis (oJIA), and if synovial fibroblasts (S-Fib) play an important role in the activation. Therefore, we aimed to investigate whether S-Fib derived from oJIA patients drive neutrophil activation.

Methods: Synovial fluid (SF) was collected from patients with oJIA.

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Monitoring belimumab concentrations in patients can be a valuable tool for assessing treatment response and for personalizing drug doses. Various assay formats may be used to measure concentrations of therapeutic monoclonal antibodies. A particularly useful format involves the use of anti-idiotype monoclonal antibodies, selected to be highly specific to the antibody of interest.

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Objectives: Adverse pregnancy outcomes are more common in women with systemic lupus erythematosus (SLE) compared with healthy women, but we lack prognostic biomarkers. Plasma interferon alpha (IFNα) protein levels are elevated in a subgroup of pregnant women with SLE, but whether this is associated with pregnancy outcomes is unknown. We investigated the relationship between IFNα, adverse pregnancy outcomes and the presence of autoantibodies in SLE pregnancy.

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Understanding universal aspects of quantum dynamics is an unresolved problem in statistical mechanics. In particular, the spin dynamics of the one-dimensional Heisenberg model were conjectured as to belong to the Kardar-Parisi-Zhang (KPZ) universality class based on the scaling of the infinite-temperature spin-spin correlation function. In a chain of 46 superconducting qubits, we studied the probability distribution of the magnetization transferred across the chain's center, [Formula: see text].

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Measurement is an essential component of quantum algorithms, and for superconducting qubits it is often the most error prone. Here, we demonstrate model-based readout optimization achieving low measurement errors while avoiding detrimental side effects. For simultaneous and midcircuit measurements across 17 qubits, we observe 1.

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Engineered dissipative reservoirs have the potential to steer many-body quantum systems toward correlated steady states useful for quantum simulation of high-temperature superconductivity or quantum magnetism. Using up to 49 superconducting qubits, we prepared low-energy states of the transverse-field Ising model through coupling to dissipative auxiliary qubits. In one dimension, we observed long-range quantum correlations and a ground-state fidelity of 0.

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A foundational assumption of quantum error correction theory is that quantum gates can be scaled to large processors without exceeding the error-threshold for fault tolerance. Two major challenges that could become fundamental roadblocks are manufacturing high-performance quantum hardware and engineering a control system that can reach its performance limits. The control challenge of scaling quantum gates from small to large processors without degrading performance often maps to non-convex, high-constraint, and time-dynamic control optimization over an exponentially expanding configuration space.

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Background: Lymphopenia, autoantibodies and activation of the type I interferon (IFN) system are common features in systemic lupus erythematosus (SLE). We speculate whether lymphocyte subset counts are affected by pregnancy and if they relate to autoantibody profiles and/or IFNα protein in SLE pregnancy.

Methods: Repeated blood samples were collected during pregnancy from 80 women with SLE and 51 healthy controls (HC).

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Unlabelled: Studies investigating the immunogenicity of additional COVID-19 vaccine doses in immunosuppressed patients with inflammatory rheumatic diseases (IRD) are still limited. The objective was to explore the antibody response including response to omicron virus subvariants (sBA.1 and sBS.

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Article Synopsis
  • The study investigates the role of ficolin-3 in Systemic Lupus Erythematosus (SLE), highlighting its significance in the lectin pathway of the complement system, which has been less explored compared to the classical pathway.
  • Analysis of serum samples from SLE patients and genetic variants showed that higher ficolin-3 activity correlates with specific SLE symptoms, including hematological issues and the presence of autoantibodies.
  • The findings suggest that ficolin-3 is an important factor in SLE pathogenesis, potentially offering insights into how the lectin pathway contributes to disease manifestations and autoantibody production.
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Even among people who are not directly impacted by the consequences of climate change, perceptions about the ongoing crisis can have a negative effect on mental health and well-being. However, empirical evidence on interventions aiming to provide support is currently scarce. In order to address this issue, a pilot-RCT was carried out to investigate the effects of a novel ICBT treatment program.

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  • Systemic lupus erythematosus (SLE) is an autoimmune disease that can affect various organs, including the brain, and researchers used an AI model called BrainAGE to assess brain aging in SLE patients.
  • The study involved 70 female SLE patients and 24 healthy controls, utilizing MRI scans and neuropsychological tests to calculate BrainAGE scores.
  • Results showed that SLE patients had significantly higher BrainAGE scores than controls, which were linked to cognitive impairments like slower reaction times and lower mental flexibility, indicating potential neuronal damage.
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Objective: Patients with RA treated with Janus kinase inhibitors (JAKis) are at increased risk of herpes zoster (HZ). The objective of this study was to investigate the serological immunogenicity and safety of the HZ subunit (HZ/su) vaccine in RA patients treated with JAKi, for which little is known.

Methods: RA patients treated with JAKi (n = 82) at the Department of Rheumatology, Skåne University Hospital, Lund and Malmö, Sweden, and healthy controls (n = 51) received two doses of the HZ/su vaccine (Shingrix).

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Objective: B cell function and autoantibodies are important in SLE pathogenesis. In this work, we aimed to investigate the impact of cumulative SLE B cell genetics on SLE subphenotype and autoantibody profile.

Methods: Female patients with SLE (n=1248) and healthy controls (n=400) were genotyped using Illumina's Global Screening Array.

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Background: An increased risk of pregnancy complications is seen in women with systemic lupus erythematosus (SLE), but the specific immunopathological drivers are still unclear. Hallmarks of SLE are granulocyte activation, type I interferon (IFN) overproduction, and autoantibodies. Here we examined whether low-density granulocytes (LDG) and granulocyte activation increase during pregnancy, and related the results to IFNα protein levels, autoantibody profile, and gestational age at birth.

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Introduction: Monocytes are key effector cells in inflammatory processes. We and others have previously shown that synovial monocytes in childhood-onset arthritis are activated. However, very little is known about how they contribute to disease and attain their pathological features.

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We aimed to explore the prevalence of atherosclerosis by using multi-view ultrasound examination of the carotid arteries and its association with clinical risk factors in a middle-aged population at low to intermediate risk of cardiovascular disease (CVD). Carotid vascular ultrasound was performed in 3532 participants in the VIPVIZA trial. Mean and maximal carotid intima media thickness (cIMT) at prespecified angles and plaque presence were examined on the left and right side.

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