Search Results - "Peiris, V"
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Towards the cold atom analog false vacuum
Published in The journal of high energy physics (01-07-2018)“…A bstract Analog condensed matter systems present an exciting opportunity to simulate early Universe models in table-top experiments. We consider a recent…”
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Bayesian analysis of inflation. II. Model selection and constraints on reheating
Published in Physical review. D, Particles, fields, gravitation, and cosmology (31-05-2012)“…We discuss the model selection problem for inflationary cosmology. We couple MODECODE, a publicly available numerical solver for the primordial perturbation…”
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3
Nonlinear dynamics of the cold atom analog false vacuum
Published in The journal of high energy physics (01-10-2019)“…A bstract We investigate the nonlinear dynamics of cold atom systems that can in princi- ple serve as quantum simulators of false vacuum decay. The analog…”
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Quantifying the rarity of the local super-volume
Published in Monthly notices of the Royal Astronomical Society (01-11-2021)“…ABSTRACT We investigate the extent to which the number of clusters of mass exceeding $10^{15}\, M_{\odot }\, h^{-1}$ within the local super-volume ($\lt…”
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5
Simple predictions from multifield inflationary models
Published in Physical review letters (22-04-2014)“…We explore whether multifield inflationary models make unambiguous predictions for fundamental cosmological observables. Focusing on N-quadratic inflation, we…”
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pop-cosmos: A Comprehensive Picture of the Galaxy Population from COSMOS Data
Published in The Astrophysical journal. Supplement series (01-09-2024)“…Abstract We present pop-cosmos : a comprehensive model characterizing the galaxy population, calibrated to 140,938 ( r < 25 selected) galaxies from the Cosmic…”
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7
Survey geometry and the internal consistency of recent cosmic shear measurements
Published in Monthly notices of the Royal Astronomical Society (01-10-2018)“…We explore the impact of an update to the typical approximation for the shape noise term in the analytic covariance matrix for cosmic shear experiments that…”
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pop-cosmos: Scaleable Inference of Galaxy Properties and Redshifts with a Data-driven Population Model
Published in The Astrophysical journal (01-11-2024)“…Abstract We present an efficient Bayesian method for estimating individual photometric redshifts and galaxy properties under a pretrained population model (…”
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9
Gravitational wave consistency relations for multifield inflation
Published in Physical review letters (23-01-2015)“…We study the tensor spectral index n(t) and the tensor-to-scalar ratio r in the simplest multifield extension to single-field, slow-roll inflation models. We…”
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10
Considerations for Optimizing the Photometric Classification of Supernovae from the Rubin Observatory
Published in The Astrophysical journal. Supplement series (01-02-2022)“…Abstract The Vera C. Rubin Observatory will increase the number of observed supernovae (SNe) by an order of magnitude; however, it is impossible to…”
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A Slowly Precessing Disk in the Nucleus of M31 as the Feeding Mechanism for a Central Starburst
Published in The Astrophysical journal (20-02-2018)“…We present a kinematic study of the nuclear stellar disk in M31 at infrared wavelengths using high spatial resolution integral field spectroscopy. The spatial…”
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Impact of Rubin Observatory Cadence Choices on Supernovae Photometric Classification
Published in The Astrophysical journal. Supplement series (01-04-2023)“…Abstract The Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) will discover an unprecedented number of supernovae (SNe), making spectroscopic…”
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13
Classification of multiwavelength transients with machine learning
Published in Monthly notices of the Royal Astronomical Society (01-03-2021)“…ABSTRACT With the advent of powerful telescopes such as the Square Kilometer Array and the Vera C. Rubin Observatory, we are entering an era of multiwavelength…”
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14
Bayesian analysis of inflation. III. Slow roll reconstruction using model selection
Published in Physical review. D, Particles, fields, gravitation, and cosmology (03-07-2012)“…We implement slow roll reconstruction-an optimal solution to the inverse problem for inflationary cosmology-within MODECODE, a publicly available solver for…”
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15
Wavelet-Bayesian inference of cosmic strings embedded in the cosmic microwave background
Published in Monthly notices of the Royal Astronomical Society (01-12-2017)“…Abstract Cosmic strings are a well-motivated extension to the standard cosmological model and could induce a subdominant component in the anisotropies of the…”
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Fine-scale monitoring of insecticide resistance in Aedes aegypti (Diptera: Culicidae) from Sri Lanka and modeling the phenotypic resistance using rational approximation
Published in Parasites & vectors (12-01-2024)“…The unplanned and intensified use of insecticides to control mosquito-borne diseases has led to an upsurge of resistance to commonly used insecticides. Aedes…”
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WiseNET: an ultralow-power wireless sensor network solution
Published in Computer (Long Beach, Calif.) (01-08-2004)“…A wireless sensor network consists of many energy-autonomous microsensors distributed throughout an area of interest. Each node monitors its local environment,…”
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18
Multivariate approximation by polynomial and generalized rational functions
Published in Optimization (03-04-2022)“…In this paper, we develop an optimization-based approach to multivariate Chebyshev approximation on a finite grid. We consider two models: multivariate…”
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A robust estimator of mutual information for deep learning interpretability
Published in Machine learning: science and technology (01-06-2023)“…Abstract We develop the use of mutual information (MI), a well-established metric in information theory, to interpret the inner workings of deep learning (DL)…”
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Strong Bound on Canonical Ultralight Axion Dark Matter from the Lyman-Alpha Forest
Published in Physical review letters (19-02-2021)“…We present a new bound on the ultralight axion (ULA) dark matter mass m_{a}, using the Lyman-alpha forest to look for suppressed cosmic structure growth: a 95%…”
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