50 citations · 171 across the 13 of their papers we have counts for
13 papers
Noncommutativity of four-dimensional axisymmetric spacetime in polar coordinate
Ryouta Matsuyama, Michiyasu Nagasawa
It is shown that in the noncommutative spacetime defined by the generalized Moyal product, consistent noncommutativity can be obtained independent of the coordinate system such as…
Gravity in Extreme Regions Based on Noncommutative Quantization of Teleparallel Gravity
Ryouta Matsuyama, Michiyasu Nagasawa
In this paper, a noncommutative gravitational theory is constructed by applying Moyal deformation quantization and the Seiberg-Witten map to teleparallel gravity, a classical gravi…
Signal of the pion string at high-energy collisions
Tao Huang, Yunde Li, Hong Mao +2
We study the possible signals of a pion string associated with the QCD chiral phase transition in LHC Pb - Pb collision at energy TeV. In terms of the Kibble-Zurek…
Stabilization of the Electroweak Z String in the Early Universe
Michiyasu Nagasawa, Robert Brandenberger
The standard electroweak theory admits a string solution, the Z string, in which only the electrically neutral Higgs fields are excited. This solution is unstable at zero temperatu…
Formation of multiple winding topological defects in the early universe
Takahiro Okabe, Michiyasu Nagasawa
The formation probability of multiple winding topological defects is calculated by phase and flux distribution analysis based on the Kibble mechanism. The core size of defects is t…
Stabilization of Embedded Defects by Plasma Effects
M. Nagasawa, R. Brandenberger
In models in which some of the scalar field are charged and some uncharged, interactions with a finite temperature plasma will lead to corrections to the effective potential of the…