Theoretical studies on more than three spatial dimensions are currently showing a distinct
shift toward the'brane world'picture, in which ordinary matter (with the possible exceptions of …

We propose a new framework for solving the hierarchy problem which does not rely on
either supersymmetry or technicolor. In this framework, the gravitational and gauge …

We recently proposed a solution to the hierarchy problem not relying on low-energy
supersymmetry or technicolor. Instead, the problem is nullified by bringing quantum gravity …

In this contribution, we discuss the cosmological scenario where unstable domain walls are
formed in the early universe and their late-time annihilation produces a significant amount of …

We revisit the singular IIB supergravity solution describing M-fractional 3-branes on the
conifold [hep-th/0002159]. Its 5-form flux decreases, which we explain by showing that the …

We discuss aspects of global and gauged symmetries in quantum field theory and quantum
gravity, focusing on discrete gauge symmetries. An effective Lagrangian description of Z p …

We present a model-independent search for a gravitational wave background from cosmic
domain walls (DWs) in the NANOGrav 12.5 years dataset and International PTA Data …

We present a novel inflationary scenario in theories with low scale (TeV) quantum gravity, in
which the standard model particles are localized on the branes whereas gravity propagates …

It is commonly thought that small couplings in a low-energy theory, such as those needed for
the fermion mass hierarchy or proton stability, must originate from symmetries in a high …

We study N= 1 gauge theories obtained by adding finite mass terms to N= 4 Yang-Mills
theory. The Maldacena dual is nonsingular: in each of the many vacua, there is an extended …