49 citations · 96 across the 5 of their papers we have counts for
5 papers
Lost Horizon? -- Modeling Black Holes in String Theory
Nick Huggett, Keizo Matsubara
The modeling of black holes is an important desideratum for any quantum theory of gravity. Not only is a classical black hole metric sought, but also agreement with the laws of bla…
String Theory and General Methodology; a Reciprocal Evaluation
Lars-Göran Johansson, Keizo Matsubara
String theory has been the dominating research field in theoretical physics during the last decades. Despite the considerable time elapse, no new testable predictions have been der…
Invariant star-products on S^2 and the canonical trace
Keizo Matsubara, Mårten Stenmark
In the literature there are two different ways of describing an invariant star product on . We show that the products are actually the same. We also calculate the canonical tr…
Open Strings in Simple Current Orbifolds
Keizo Matsubara, Volker Schomerus, Mikael Smedback
We study branes and open strings in a large class of orbifolds of a curved background using microscopic techniques of boundary conformal field theory. In particular, we obtain fact…
Restrictions on Gauge Groups in Noncommutative Gauge Theory
Keizo Matsubara
We show that the gauge groups SU(N), SO(N) and Sp(N) cannot be realized on a flat noncommutative manifold, while it is possible for U(N).