193 citations · 942 across the 33 of their papers we have counts for
33 papers
Holographic bound in covariant loop quantum gravity
Takashi Tamaki
We investigate puncture statistics based on the covariant area spectrum in loop quantum gravity. First, we consider Maxwell-Boltzmann statistics with a Gibbs factor for punctures.…
Gravastar Shadows
Nobuyuki Sakai, Hiromi Saida, Takashi Tamaki
Direct observation of black holes is one of the grand challenges in astronomy. If there are super-compact objects which possess unstable circular orbits of photons, however, it may…
Gauged Q-balls in the Affleck-Dine mechanism
Takashi Tamaki, Nobuyuki Sakai
We consider gauged Q-balls in the gravity-mediation-type model in the Affleck-Dine mechanism, which is described by the potential $V_{\rm grav.}(ϕ):=(m_{\rm grav.}^2/2)ϕ^2\left[1+K…
Unified pictures of Q-balls and Q-tubes
Takashi Tamaki, Nobuyuki Sakai
While Q-balls have been investigated intensively for many years, another type of nontopological solutions, Q-tubes, have not been understood very well. In this paper we make a comp…
What happens to Q-balls if is so large?
Nobuyuki Sakai, Takashi Tamaki
In the system of a gravitating Q-ball, there is a maximum charge inevitably, while in flat spacetime there is no upper bound on in typical models such as the Affl…
What are universal features of gravitating Q-balls?
Takashi Tamaki, Nobuyuki Sakai
We investigate how gravity affects Q-balls by exemplifying the case of the Affleck-Dine potential . Surprisingly, stable Q-balls with arbitrarily…