Programme

O.16 -- Oral, VCTP-50

Date: Tuesday, 5 August 2025

Time: 16:50 - 17:15

Dimensional reduction issue of a six-dimensional Kaluza-Klein theory

Tuan Q. Do

Phenikaa Institute for Advanced Study, Phenikaa University, Hanoi 12116, Vietnam

In this talk, we will present a dimensional reduction issue of a six-dimensional Kaluza-Klein theory. In particular, we will show that two approaches of dimensional reduction lead to different four-dimensional effective actions although using the same six-dimensional metric. It is noted that the first dimensional reduction is a direct one, i.e., from six-dimensional spacetimes directly to four-dimensional ones, via a $T^2 \equiv S^1 \times S^1$ compactification. On the other hand, the second dimensional reduction is an indirect one, i.e., from six-dimensional spacetimes to five-dimensional ones then four-dimensional ones, via two separated $S^1$ compactifications. It could therefore address an important question of which approach is more reliable than the other.

Presenter: Do Quoc Tuan