9 research outputs found
First-Order Quantum Correction in Coherent State Expectation Value of Loop-Quantum-Gravity Hamiltonian: I. Overview and Results
Given the Loop-Quantum-Gravity (LQG) non-graph-changing Hamiltonian
, the coherent state expectation value
admits an semiclassical expansion in
. In this paper, we compute explicitly the expansion of
on the cubic graph to the linear order in
, when the coherent state is peaked at the homogeneous and
isotropic data of cosmology. In our computation, a powerful algorithm is
developed to overcome the complexity in computing . In particular, some key innovations in our algorithm substantially
reduce the computational complexity in the Lorentzian part of
. Moreover, the algorithm developed in the
present work makes it possible to compute the expectation value of arbitrary
monomial of holonomies and fluxes on one edge up to arbitrary order of
.Comment: 25 pages. arXiv admin note: substantial text overlap with
arXiv:2102.0359
Multi-spatial-mode effects in squeezed-light-enhanced interferometric gravitational wave detectors
Proposed near-future upgrades of the current advanced interferometric
gravitational wave detectors include the usage of frequency dependent squeezed
light to reduce the current sensitivity-limiting quantum noise. We quantify and
describe the degradation effects that spatial mode-mismatches between optical
resonators have on the squeezed field. These mode-mismatches can to first order
be described by scattering of light into second-order Gaussian modes. As a
demonstration of principle, we also show that squeezing the second-order
Hermite-Gaussian modes and , in addition
to the fundamental mode, has the potential to increase the robustness to
spatial mode-mismatches. This scheme, however, requires independently optimized
squeeze angles for each squeezed spatial mode, which would be challenging to
realise in practise.Comment: 10 pages, 12 figure
Diabetic Kidney Disease versus Primary Glomerular Disease: A Propensity Score-Matched Analysis of Association between Ambulatory Blood-Pressure Monitoring and Target-Organ Damage
Diabetic kidney disease (DKD) and primary glomerular disease (PGD) are the main causes of chronic kidney disease (CKD) and end-stage renal disease (ESRD). This study was conducted to compare the characteristics of ambulatory blood-pressure monitoring (ABPM) and its relationship with target-organ damage (TOD) in patients with DKD and PGD matched by propensity score. The assessment of TOD included macroalbuminuria, left ventricular hypertrophy (LVH) and macrovascular disease. Propensity-score weighting (PSW) was used in stratified analysis. Results: Patients with DKD had a higher prevalence of abnormal blood-pressure patterns such as reversed dipper pattern, nocturnal hypertension, and sustained hypertension and had a higher prevalence of TOD than did patients with PGD. Logistic regression indicated that patients with DKD were more related to TOD than to PGD. The stratified analysis indicated that DKD patients with white-coat hypertension, masked hypertension and sustained hypertension had closer relationships with TOD compared with PGD patients. Conclusion: Patients with type 2 diabetic kidney disease had more abnormal blood-pressure patterns and were more closely related to target organ damage than were patients with primary glomerular disease
Effects of Velocity-Based versus Percentage-Based Resistance Training on Explosive Neuromuscular Adaptations and Anaerobic Power in Sport-College Female Basketball Players
The purpose of this study was to compare the impact of velocity-based resistance training (VBRT) and percentage-based resistance training (PBRT) on anaerobic ability, sprint performance, and jumping ability. Eighteen female basketball players from a Sport College were randomly divided into two groups: VBRT (n = 10) and PBRT (n = 8). The six-week intervention consisted of two sessions per week of free-weight back squats with linear periodization from 65% to 95%1RM. In PBRT, the weights lifted were fixed based on 1RM percentage, while in VBRT, the weights were adjusted based on individualized velocity profiles. The T-30m sprint time, relative power of countermovement jump (RP-CMJ), and Wingate test were evaluated. The Wingate test assessed peak power (PP), mean power (MP), fatigue index (FI), maximal velocity (Vmax), and total work (TW). Results showed that VBRT produced a very likely improvement in RP-CMJ, Vmax, PP, and FI (Hedges’ g = 0.55, 0.93, 0.68, 0.53, respectively, p p p < 0.05 for interaction effect). In conclusion, PBRT may be more effective in maintaining high-power velocity endurance, while VBRT has a greater impact on explosive power adaptations