58 research outputs found
State Carving in a Chirally-Coupled Atom-Nanophotonic Cavity
Coherent quantum control of multiqubit systems represents one of the
challenging tasks in quantum science and quantum technology. Here we
theoretically investigate the reflectivity spectrum in an atom-nanophotonic
cavity with collective nonreciprocal couplings. In the strong-coupling regime
with a high cooperativity, we theoretically predict distinct on-resonance
spectral dips owing to destructive interferences of chiral couplings. Due to
the well-separated multiple dips in the spectrum, a contrasted reflectivity
suggests a new control knob over the desired entangled state preparation. We
propose to utilize such atom-nanophotonic cavity to quantum engineer the atomic
internal states via photon-mediated dipole-dipole interactions and the
chirality of decay channels, where the atomic Bell state and W states for
arbitrary number of atoms can be tailored and heralded by state carving in the
single-photon reflection spectrum. Our results pave the way toward quantum
engineering of multiqubit states and offer new opportunities for coherent and
scalable multipartite entanglement transport in atoms coupled to nanophotonic
devices.Comment: 5 figure
Marine turtle management, conservation and protection programme in Malaysia
Malaysia has since long been involved in turtle management, conservation and protection. Turtle survival in Malaysia is being threatened by among others, commercial exploitation, habitat destruction, fisheries interaction and marine pollution. At the federal level, the Fisheries Act 1985 serves as the primary legislation for the protection of fisheries and also provides for the inclusion of turtle conservation and management. Four species of marine turtles found in Peninsular Malaysia are confirmed to nest: Dermochelys coreacea, Chelonia mydas, Eretmochelys imbricata and Lepidochelys olivacea
Clinical utility of calf front hoof circumference and maternal intrapelvic area in predicting dystocia in 103 late gestation Holstein-Friesian heifers and cows
The objective of this study was to determine the clinical utility of measuring calf front hoof circumference, maternal intrapelvic area, and selected morphometric values in predicting dystocia in dairy cattle. An observational study using a convenience sample of 103 late-gestation Holstein-Friesian heifers and cows was performed. Intrapelvic height and width of the dam were measured using a pelvimeter, and the intrapelvic area was calculated. Calf front hoof circumference and birth weight were also measured. Data were analyzed using Spearman's correlation coefficient (rs), Mann–Whitney U test, and binary or ordered logistic regression; P 0.068 cm/cm2). Determining the ratio of calf front hoof circumference to maternal intrapelvic area has clinical utility in predicting the calving difficulty score in Holstein-Friesian cattle
Generating scalable graph states in an atom-nanophotonic interface
Scalable graph states are essential for measurement-based quantum computation
and many entanglement-assisted applications in quantum technologies. Generation
of these multipartite entangled states requires a controllable and efficient
quantum device with delicate design of generation protocol. Here we propose to
prepare high-fidelity and scalable graph states in one and two dimensions,
which can be tailored in an atom-nanophotonic cavity via state carving
technique. We propose a systematic protocol to carve out unwanted state
components, which facilitates scalable graph states generations via adiabatic
transport of a definite number of atoms in optical tweezers. An analysis of
state fidelity is also presented, and the state preparation probability can be
optimized via multiqubit state carvings and sequential single-photon probes.
Our results showcase the capability of an atom-nanophotonic interface for
creating graph states and pave the way toward novel problem-specific
applications using scalable high-dimensional graph states with stationary
qubits.Comment: 5 figures with supplemental materia
Association of Body Mass Index and Extreme Obesity With Long-Term Outcomes Following Percutaneous Coronary Intervention
Background:
Previous studies have reported a protective effect of obesity compared with normal body mass index (BMI) in patients undergoing percutaneous coronary intervention (PCI). However, it is unclear whether this effect extends to the extremely obese. In this large multicenter registry‐based study, we sought to examine the relationship between BMI and long‐term clinical outcomes following PCI, and in particular to evaluate the association between extreme obesity and long‐term survival after PCI.
Methods and Results:
This cohort study included 25 413 patients who underwent PCI between January 1, 2005 and June 30, 2017, who were prospectively enrolled in the Melbourne Interventional Group registry. Patients were stratified by World Health Organization–defined BMI categories. The primary end point was National Death Index–linked mortality. The median length of follow‐up was 4.4 years (interquartile range 2.0‐7.6 years). Of the study cohort, 24.8% had normal BMI (18.5‐24.9 kg/m2), and 3.3% were extremely obese (BMI ≥40 kg/m2). Patients with greater degrees of obesity were younger and included a higher proportion of diabetics (P<0.001). After adjustment for age and comorbidities, a J‐shaped association was observed between different BMI categories and adjusted hazard ratio (HR) for long‐term mortality (normal BMI, HR 1.00 [ref]; overweight, HR 0.85, 95% CI 0.78‐0.93, P<0.001; mild obesity, HR 0.85, 95% CI 0.76‐0.94, P=0.002; moderate obesity, HR 0.95, 95% CI 0.80‐1.12, P=0.54; extreme obesity HR 1.33, 95% CI 1.07‐1.65, P=0.01).
Conclusions:
An obesity paradox is still apparent in contemporary practice, with elevated BMI up to 35 kg/m2 associated with reduced long‐term mortality after PCI. However, this protective effect appears not to extend to patients with extreme obesity
Inappropriate implantable defibrillator discharges from lead failure (letter)
Letter to the editor: A 77-year-old woman with a history of idiopathic long-QT syndrome (presumed genetic) presented to hospital with a storm of defibrillator shocks from her implantable cardioverter defibrillator (ICD). She had a single-chamber Guidant Ventak Prizm VR, model 1850, and a Guidant ventricular lead, model 0148 (Guidant Corporation, Indianapolis, Ind, USA) implanted 12 months earlier after an episode of syncope. The lead had been implanted by left subclavian venous access. The patient’s postoperative course and responses to routine questioning indicated that the device was functioning normally. After presenting with device discharges, a 12-lead electrocardiogram showed over-sensing suggestive of lead dysfunction
Communication and relationship satisfaction in Chinese, Western, and Intercultural Chinese-Western couples
Relationship standards and satisfaction in Chinese, Western, and Intercultural Chinese-Western couples in Australia
Communication and relationship satisfaction in Chinese, Western, and Intercultural Chinese-Western couples
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