Synchronization in coupled laser arrays with correlated and uncorrelated
disorder
March 8, 2023
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Physics
Optics
The effect of quenched disorder in a many-body system is experimentally
investigated in a controlled fashion. It is done by measuring the phase
synchronization (i.e. mutual coherence) of 400 coupled lasers as a function of
tunable disorder ...
Breaking Symmetries Leads to Diverse Quadrupedal Gaits
March 8, 2023
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Computer Science
Electrical Engineering and Systems Science
Robotics
Systems and Control
Systems and Control
Symmetry manifests itself in legged locomotion in a variety of ways. No
matter where a legged system begins to move periodically, the torso and limbs
coordinate with each other's movements in a similar manner. Also, in many gaits
observed i...
Some New Results on the Maximum Growth Factor in Gaussian Elimination
March 8, 2023
|
Mathematics
Computer Science
Numerical Analysis
Numerical Analysis
This paper combines modern numerical computation with theoretical results to
improve our understanding of the growth factor problem for Gaussian
elimination. On the computational side we obtain lower bounds for the maximum
growth for comple...
ARS-DETR: Aspect Ratio Sensitive Oriented Object Detection with
Transformer
March 8, 2023
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Computer Science
Computer Vision and Pattern Recognition
Artificial Intelligence
Existing oriented object detection methods commonly use metric AP50 to
measure the performance of the model. We argue that AP50 is inherently
unsuitable for oriented object detection due to its large tolerance in angle
deviation. ...
Sensitivity analysis for principal ignorability violation in estimating
complier and noncomplier average causal effects
March 8, 2023
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Statistics
Methodology
An important strategy for identifying principal causal effects, which are
often used in settings with noncompliance, is to invoke the principal
ignorability (PI) assumption. As PI is untestable, it is important to gauge how
sensitive effect...
Rigidity of harmonic functions on the supercritical percolation cluster
March 8, 2023
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Mathematics
Probability
Analysis of PDEs
We use ideas from quantitative homogenization to show that nonconstant
harmonic functions on the percolation cluster cannot satisfy certain structural
constraints, for example, a Lipschitz bound. These unique-continuation-type
results are f...
Estimation of Long-Range Dependent Models with Missing Data: to Impute
or not to Impute?
March 8, 2023
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Statistics
Methodology
Computation
Among the most important models for long-range dependent time series is the
class of ARFIMA(p,d,q) (Autoregressive Fractionally Integrated Moving
Average) models. Estimating the long-range dependence parameter d in ARFIMA
models is a we...
Emulating two qubits with a four-level transmon qudit for variational
quantum algorithms
March 8, 2023
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Physics
Quantum Physics
Using quantum systems with more than two levels, or qudits, can scale the
computation space of quantum processors more efficiently than using qubits,
which may offer an easier physical implementation for larger Hilbert spaces.
However, indi...
The epidemiological footprint of contact structures in models with two
levels of mixing
March 8, 2023
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Quantitative Biology
Physics
Populations and Evolution
Physics and Society
Models with several levels of mixing (households, workplaces), as well as
various corresponding formulations for R0, have been proposed in the
literature. However, little attention has been paid to the impact of the
distribution of the popu...
Universal bounds on optimization of free energy harvesting
March 8, 2023
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Physics
Statistical Mechanics
Adaptation and Self-Organizing Systems
Biological Physics
Harvesting free energy from the environment is essential for the operation of
many biological and artificial systems. We investigate the maximum rate of
harvesting achievable by optimizing a set of reactions in a Markovian system,
possibly ...