Zobrazeno 1 - 10
of 879
pro vyhledávání: '"Pritchard, Jonathan"'
Autor:
Noble, Leon, Kamran, Mohd, Majumdar, Suman, Murmu, Chandra Shekhar, Ghara, Raghunath, Mellema, Garrelt, Iliev, Ilian T., Pritchard, Jonathan R.
The morphology of the 21-cm signal emitted by the neutral hydrogen present in the intergalactic medium (IGM) during the Epoch of Reionization (EoR) depends both on the properties of the sources of ionizing radiation and on the underlying physical pro
Externí odkaz:
http://arxiv.org/abs/2406.03118
Autor:
Lopez, Romain, Huetter, Jan-Christian, Hajiramezanali, Ehsan, Pritchard, Jonathan, Regev, Aviv
Publikováno v:
Causal Learning and Reasoning 2024
Deep Generative Models (DGMs) are versatile tools for learning data representations while adequately incorporating domain knowledge such as the specification of conditional probability distributions. Recently proposed DGMs tackle the important task o
Externí odkaz:
http://arxiv.org/abs/2401.15903
A measurement of the 21-cm global signal would be a revealing probe of the Dark Ages, the era of first star formation, and the Epoch of Reionization. It has remained elusive owing to bright galactic and extra-galactic foreground contaminants, coupled
Externí odkaz:
http://arxiv.org/abs/2310.06063
Publikováno v:
Optics Express Vol. 32, Issue 3, pp. 2916-2928 (2024)
In this paper we demonstrate operation of a quantum-enhanced lidar based on a continuously pumped photon pair source combined with simple detection in regimes with over 5 orders of magnitude separation between signal and background levels and target
Externí odkaz:
http://arxiv.org/abs/2307.10794
In a noisy environment with weak single levels, quantum illumination can outperform classical illumination in determining the presence and range of a target object even in the limit of sub-optimal measurements based on non-simultaneous, phase-insensi
Externí odkaz:
http://arxiv.org/abs/2307.10785
Publikováno v:
Optics Continuum 2, 894 (2023)
We present a high efficiency source of picosecond pulses derived from a dual cavity optical frequency comb generator. This approach overcomes the limitations of single cavity comb generators that are restricted to efficiencies of a few percent. We ac
Externí odkaz:
http://arxiv.org/abs/2211.12871
Autor:
Lopez, Romain, Tagasovska, Nataša, Ra, Stephen, Cho, Kyunghyn, Pritchard, Jonathan K., Regev, Aviv
Latent variable models such as the Variational Auto-Encoder (VAE) have become a go-to tool for analyzing biological data, especially in the field of single-cell genomics. One remaining challenge is the interpretability of latent variables as biologic
Externí odkaz:
http://arxiv.org/abs/2211.03553
In genetically admixed populations, admixed individuals possess ancestry from multiple source groups. Studies of human genetic admixture frequently estimate ancestry components corresponding to fractions of individual genomes that trace to specific a
Externí odkaz:
http://arxiv.org/abs/2210.12306
Autor:
Kamran, Mohd, Ghara, Raghunath, Majumdar, Suman, Mellema, Garrelt, Bharadwaj, Somnath, Pritchard, Jonathan R., Mondal, Rajesh, Iliev, Ilian T.
The radiations from the first luminous sources drive the fluctuations in the 21-cm signal at Cosmic Dawn (CD) via two dominant astrophysical processes i.e. the Ly$\alpha$ coupling and X-ray heating, making this signal highly non-Gaussian. The impact
Externí odkaz:
http://arxiv.org/abs/2207.09128