Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Daniel H. Wesley"'
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 6, Pp 1-14 (2020)
Abstract Perhaps the greatest challenge for fundamental theories based on compactification from extra dimensions is accommodating a period of accelerated cosmological expansion. Previous studies have identified constraints imposed by the existence of
Externí odkaz:
https://doaj.org/article/2a7aeb34388b4155be9a67bb7af8c577
Autor:
Asad M. Aboobaker, William B. Doriese, Daniel H. Wesley, L. A. Page, Suzanne T. Staggs, Tobias A. Marriage, Joseph W. Fowler, Y. S. Loh, Zigmund Kermish, Mark Halpern, Huan Tran, C. Dumont
Publikováno v:
The Astrophysical Journal Supplement Series. 156:1-11
We report on the design, first observing season, and analysis of data from a new prototype millimeter-wave interferometer, MINT. MINT consists of four 145 GHz SIS mixers operating in double-sideband mode in a compact heterogeneous configuration. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7a699c878fe54c12057dab97e59a1a7
https://doi.org/10.1086/426393
https://doi.org/10.1086/426393
Publikováno v:
Physical Review D. 87
We compute the scalar gravitational radiation from a binary pulsar system in the simplest model that exhibits the Vainshtein mechanism. The mechanism is successful in screening the effect from scalar fields conformally coupled to matter, although gra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2bd34794181efce8e2e84da575bfd647
https://doi.org/10.1103/physrevd.87.044025
https://doi.org/10.1103/physrevd.87.044025
Autor:
Paul J. Steinhardt, Daniel H. Wesley
Publikováno v:
Physical Review D. 79
We consider how accelerated expansion, whether due to inflation or dark energy, imposes strong constraints on fundamental theories obtained by compactification from higher dimensions. For theories that obey the null energy condition (NEC), we find th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1df9ff0f83953c936bf9ffa53efb2c6c
https://doi.org/10.1103/physrevd.79.104026
https://doi.org/10.1103/physrevd.79.104026
Publikováno v:
Physical Review D. 76
We show that the existence of cosmic strings can be strongly constrained by the next generation of gravitational lensing surveys at radio frequencies. We focus on cosmic string loops, which simulations suggest would be far more numerous than long (ho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5766aa8e6116c0c8cb4fd9e66cea248
https://doi.org/10.1103/physrevd.76.123515
https://doi.org/10.1103/physrevd.76.123515
Large-scale coherent magnetic fields are observed in galaxies and clusters, but their ultimate origin remains a mystery. We reconsider the prospects for primordial magnetogenesis by a cosmic string network. We show that the magnetic flux produced by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24b51404e5c16df991548e14d8be306a
http://arxiv.org/abs/0708.2901
http://arxiv.org/abs/0708.2901
Autor:
Daniel H. Wesley
Compactification can control chaotic Mixmaster behavior in gravitational systems with p-form matter: we consider this in light of the connection between supergravity models and Kac-Moody algebras. We show that different compactifications define "muta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9f93e04054e8e3f3ce5b60fcfbf7c19
http://arxiv.org/abs/hep-th/0610322
http://arxiv.org/abs/hep-th/0610322
Autor:
Daniel H. Wesley, Andrew J. Tolley
We study the pair creation of point-particles and strings in a time-dependent, weak gravitational field. We find that, for massive string states, there are surprising and significant differences between the string and point-particle results. Central
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16e9dabea0ffdc04d7c8d75af157cfac
We consider the effect of compactification of extra dimensions on the onset of classical chaotic "Mixmaster" behavior during cosmic contraction. Assuming a universe that is well-approximated as a four-dimensional Friedmann-Robertson--Walker model (wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b5db2e01e47431c3bdbea1d63ad1c59
We consider cosmological models with a scalar field with equation of state $w\ge 1$ that contract towards a big crunch singularity, as in recent cyclic and ekpyrotic scenarios. We show that chaotic mixmaster oscillations due to anisotropy and curvatu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2dbcafe76b80650626cbbec2b7a67c55