Zobrazeno 1 - 10
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pro vyhledávání: '"ALLEN, BRUCE A."'
New lattice quantizers with lower normalized second moments than previously reported are constructed in 13 and 14 dimensions and conjectured to be optimal. Our construction combines an initial numerical optimization with a subsequent analytical optim
Externí odkaz:
http://arxiv.org/abs/2411.19250
Autor:
Ming, Jing, Papa, Maria Alessandra, Eggenstein, Heinz-Bernd, Beheshtipour, Banafsheh, Machenschalk, Bernd, Prix, Reinhard, Allen, Bruce, Bensch, Maximillian
We perform a search for continuous nearly monochromatic gravitational waves from the central compact objects associated with the supernova remnants Vela Jr. and G347.3 using LIGO O2 and O3 public data. Over $10^{18}$ different waveforms are considere
Externí odkaz:
http://arxiv.org/abs/2408.14573
Autor:
Allen, Bruce, Romano, Joseph D.
Pulsar timing arrays (PTAs) detect gravitational waves (GWs) via the correlations they create in the arrival times of pulses from different pulsars. The mean correlation, a function of the angle between the directions to two pulsars, was predicted in
Externí odkaz:
http://arxiv.org/abs/2407.10968
Publikováno v:
Phys. Rev. D110, 123507 (2024)
Pulsar timing arrays (PTA) hunt for gravitational waves (GW) by searching for the correlations that GWs induce in the time-of-arrival residuals from different pulsars. If the GW sources are of astrophysical origin, then they are located at discrete p
Externí odkaz:
http://arxiv.org/abs/2406.16031
Autor:
Allen, Bruce
Publikováno v:
Physical Review D 110, 043043 (2024)
Gravitational waves (GWs) influence the arrival times of radio signals coming from pulsars. Here, we investigate the harmonic space approach to describing a pulsar's response to GWs. We derive and discuss the "diagonalized form" of the response, whic
Externí odkaz:
http://arxiv.org/abs/2404.05677
Autor:
Allen, Bruce, Valtolina, Serena
Publikováno v:
Phys. Rev. D 109, 083038 (2024)
The stochastic gravitational wave background for pulsar timing arrays is often modeled by a Gaussian ensemble which is isotropic and unpolarized. However, the Universe has a discrete set of polarized gravitational wave sources at specific sky locatio
Externí odkaz:
http://arxiv.org/abs/2401.14329
Lattices with minimal normalized second moments are designed using a new numerical optimization algorithm. Starting from a random lower-triangular generator matrix and applying stochastic gradient descent, all elements are updated towards the negativ
Externí odkaz:
http://arxiv.org/abs/2401.01799
40 years ago, Conway and Sloane proposed using the highly symmetrical Coxeter-Todd lattice $K_{12}$ for quantization, and estimated its second moment. Since then, all published lists identify $K_{12}$ as the best 12-dimensional lattice quantizer. Sur
Externí odkaz:
http://arxiv.org/abs/2312.00481
Autor:
Lazio, T. Joseph W., Djorgovski, S. G., Howard, Andrew, Cutler, Curt, Sheikh, Sofia Z., Cavuoti, Stefano, Herzing, Denise, Wagstaff, Kiri, Wright, Jason T., Gajjar, Vishal, Hand, Kevin, Rebbapragada, Umaa, Allen, Bruce, Cartmill, Erica, Foster, Jacob, Gelino, Dawn, Graham, Matthew J., Longo, Giuseppe, Mahabal, Ashish A., Pachter, Lior, Ravi, Vikram, Sussman, Gerald
Humanity has wondered whether we are alone for millennia. The discovery of life elsewhere in the Universe, particularly intelligent life, would have profound effects, comparable to those of recognizing that the Earth is not the center of the Universe
Externí odkaz:
http://arxiv.org/abs/2308.15518
Autor:
Romano, Joseph D., Allen, Bruce
Publikováno v:
Class. Quantum Grav. 41 175008 (2024)
We answer frequently asked questions (FAQs) about the Hellings and Downs correlation curve -- the "smoking-gun" signature that pulsar timing arrays (PTAs) have detected gravitational waves (GWs). Many of these questions arise from inadvertently apply
Externí odkaz:
http://arxiv.org/abs/2308.05847