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SUMMARY:A reconstruction scheme for f(T) gravity based on QCD ghost dark e
 nergy
DTSTART;VALUE=DATE-TIME:20151026T060800Z
DTEND;VALUE=DATE-TIME:20151026T062500Z
DTSTAMP;VALUE=DATE-TIME:20260521T202632Z
UID:indico-contribution-901@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Surajit Chattopadhyay (Pailan College of Management 
 and Technology\, Kolkata)\nAccelerated expansion of our universe\, as evid
 enced by Supernovae Ia (SNeIa)\, Cosmic Microwave Background (CMB) radiati
 on anisotropies\, Large Scale Structure (LSS) and X-ray experiments\, is w
 ell documented in literature. A missing energy component\, also known as D
 ark Energy (DE) with negative pressure\, is widely considered by scientist
 s as the responsible of this accelerated expansion. DE model\, so-called V
 eneziano ghost DE (GDE)\, has been proposed in [1]. The key ingredient of 
 this new model is that the Veneziano ghost\, which is unphysical in the us
 ual Minkowski spacetime quantum field theory (QFT)\, exhibits important ph
 ysical effects in dynamical spacetime or spacetime with non-trivial topolo
 gy. Veneziano ghost is supposed to exist for solving the U(1) problem in t
 he low-energy effective theory of QCD [2]. The present paper reports a rec
 onstruction scheme for f(T) gravity based on QCD ghost dark energy. Two mo
 dels of f(T) have been generated and the pressure and density contribution
 s due to torsion have been reconstructed. Two realistic models have been o
 btained and the effective equations of state have been studied. Also\, the
  squared speed of sound has been studied to examine the stability of the m
 odels.\n\nReferences:\n[1] F.R. Urban\, A.R. Zhitnitsky\, Phys. Lett. B 68
 8\, 9 (2010).\n[2] R.-G. Cai\, Z.-L. Tuo\, H.-B. Zhang\, Q. Su\, Phys. Rev
 . D 84\, 123501 (2011).\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/cont
 ributions/901/
LOCATION: Room 2
URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/901/
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