Advanced search    

Search: authors:"Masaki Shigemori"

9 papers found.
Use AND, OR, NOT, +word, -word, "long phrase", (parentheses) to fine-tune your search.

Non-Abelian supertubes

A supertube is a supersymmetric configuration in string theory which occurs when a pair of branes spontaneously polarizes and generates a new dipole charge extended along a closed curve. The dipole charge of a codimension-2 supertube is characterized by the U-duality monodromy as one goes around the supertube. For multiple codimension-2 supertubes, their monodromies do not commute ...

Codimension-2 solutions in five-dimensional supergravity

We study a new class of supersymmetric solutions in five-dimensional supergravity representing multi-center configurations of codimension-2 branes along arbitrary curves. Codimension-2 branes are produced in generic situations out of ordinary branes of higher codimension by the supertube effect and, when they are exotic branes, spacetime generally becomes non-geometric. The ...

ABJ theory in the higher spin limit

We study the conjecture made by Chang, Minwalla, Sharma, and Yin on the duality between the \( \mathcal{N}=6 \) Vasiliev higher spin theory on AdS4 and the \( \mathcal{N}=6 \) Chern-Simons-matter theory, so-called ABJ theory, with gauge group U(N) × U(N + M). Building on our earlier results on the ABJ partition function, we develop the systematic 1/M expansion, corresponding to the ...

Black-hole entropy from supergravity superstrata states

There are, by now, several arguments that superstrata, which represent D1-D5-P bound states that depend upon arbitrary functions of two variables and that preserve four supersymmetries, exist in string theory, and that their gravitational back-reaction results in smooth horizonless solutions. In this paper we examine the shape and density modes of the superstratum and give strong ...

Habemus superstratum! A constructive proof of the existence of superstrata

We construct the first example of a superstratum: a class of smooth horizonless supergravity solutions that are parameterized by arbitrary continuous functions of (at least) two variables and have the same charges as the supersymmetric D1-D5-P black hole. We work in Type IIB string theory on T 4 or K3 and our solutions involve a subset of fields that can be described by a ...

The partition function of ABJ theory

We study the partition function of the $\mathcal {N}=6$ supersymmetric U(N1)k × U(N2)−k Chern–Simons-matter (CSM) theory, also known as the ABJ theory. For this purpose, we first compute the partition function of the U(N1) × U(N2) lens space matrix model exactly. The result can be expressed as a product of the q-deformed Barnes G-function and a generalization of the multiple ...

Supersymmetric solutions in six dimensions: a linear structure

The equations underlying all supersymmetric solutions of six-dimensional minimal ungauged supergravity coupled to an anti-self-dual tensor multiplet have been known for quite a while, and their complicated non-linear form has hindered all attempts to systematically understand and construct supersymmetric solutions. In this paper we show that, by suitably re-parameterizing these ...

Double, double supertube bubble

We argue that there exists a new class of completely smooth \( \frac{1}{8} \)-BPS, three-charge bound state configurations that depend upon arbitrary functions of two variables. These configurations are locally \( \frac{1}{2} \)-BPS objects in that if they form an infinite flat sheet then they preserve 16 supersymmetries but even with arbitrary two-dimensional shape modes they ...

Moulting Black Holes

We find a family of novel supersymmetric phases of the D1-D5 CFT, which in certain ranges of charges have more entropy than all known ensembles. We also find bulk BPS configurations that exist in the same range of parameters as these phases, and have more entropy than a BMPV black hole; they can be thought of as coming from a BMPV black hole shedding a “hair” condensate outside of ...