Mergers and Typical Black Hole Microstates

We use mergers of microstates to obtain the first smooth horizonless microstate solutions corresponding to a BPS three-charge black hole with a classically large horizon area. These microstates have very long throats, that become infinite in the classical limit; nevertheless, their curvature is everywhere small. Having a classically-infinite throat makes these microstates very similar to the typical microstates of this black hole. A rough CFT analysis confirms this intuition, and indicates a possible class of dual CFT microstates. We also analyze the properties and the merging of microstates corresponding to zero-entropy BPS black holes and black rings. We find that these solutions have the same size as the horizon size of their classical counterparts, and we examine the changes of internal structure of these microstates during mergers.Comment: 49 pages, 5 figures. v2 references adde

The propagator for a general form field in AdSd+1AdS_{d+1}

Using the known propagator equations for 0,1 and 2 forms in AdS_{d+1}, we find the p-form field propagator equations in dimensions where the forms are Poincare dual. Since the general equation obeyed by the propagators is linear in dimension, this gives us the equation obeyed by the propagators for any d. Furthermore, based on the Poincare duality formulas for 0,1,2 and 3 forms we conjecture the general form of the Poincare duality formulas, and check them against the previously found propagator equations. The whole structure is self-consistent. Once we have the equations, we can easily obtain all the p-form field propagators in AdS_{d+1}. The generalization to massive p-forms can also be easily done.Comment: Extra chapter added on massive p-forms. 10 pages, REVTE

Bubbles on Manifolds with a U(1) Isometry

We investigate the construction of five-dimensional, three-charge supergravity solutions that only have a rotational U(1) isometry. We show that such solutions can be obtained as warped compactifications with a singular ambi-polar hyper-Kahler base space and singular warp factors. We show that the complete solution is regular around the critical surface of the ambi-polar base. We illustrate this by presenting the explicit form of the most general supersymmetric solutions that can be obtained from an Atiyah-Hitchin base space and its ambi-polar generalizations. We make a parallel analysis using an ambi-polar generalization of the Eguchi-Hanson base space metric. We also show how the bubbling procedure applied to the ambi-polar Eguchi-Hanson metric can convert it to a global AdS_2xS^3 compactification.Comment: 33 pages, 5 figures, LaTeX; references adde

Non-extremal Black Hole Microstates: Fuzzballs of Fire or Fuzzballs of Fuzz ?

We construct the first family of microstate geometries of near-extremal black holes, by placing metastable supertubes inside certain scaling supersymmetric smooth microstate geometries. These fuzzballs differ from the classical black hole solution macroscopically at the horizon scale, and for certain probes the fluctuations between various fuzzballs will be visible as thermal noise far away from the horizon. We discuss whether these fuzzballs appear to infalling observers as fuzzballs of fuzz or as fuzzballs of fire. The existence of these solutions suggests that the singularity of non-extremal black holes is resolved all the way to the outer horizon and this "backwards in time" singularity resolution can shed light on the resolution of spacelike cosmological singularities.Comment: 34 pages, 10 figure

Effects of decoherence on the shot noise in carbon nanotubes

We study the zero frequency noise in an interacting quantum wire connected to leads, in the presence of an impurity. In the absence of quasiparticle decoherence the zero-frequency noise is that of a non-interacting wire. However, if the collective, fractionally-charged modes have a finite lifetime, we find that the zero-frequency noise may still exhibit signatures of charge fractionalization, such as a small but detectable reduction of the ratio between the noise and the backscattered current (Fano factor). We argue that this small reduction of the Fano factor is consistent with recent observations of a large reduction in the experimentally-inferred Fano factor in nanotubes (calculated assuming that the backscattered current is the difference between the ideal current in a multiple-channel non-interacting wire and the measured current.Comment: 6 pages, 1 figur

Persistent anti-brane singularities

Anti-D-branes inserted in warped throat geometries (supported by fluxes that carry D-brane charges) develop unphysical singularities. It has been argued that these singularities could be resolved when one goes beyond the linearized approximation or includes the effects of brane polarization. In this paper we consider anti-D6 branes, whose singularities have been shown to exist at the full non-linear level, and demonstrate that there is no D8 brane polarization that can resolve the singularity. We comment on the potential implications of this result for the resolution of anti-D3 brane singularities in the Klebanov-Strassler geometry.Comment: 16 pages; v2: comments added, version to appear in JHE

Penerapan Prinsip-prinsip Good Corporate Governance pada PT Purnama Semesta Alamiah

Dewasa ini GCG semakin diperlukan untuk memberikan kemajuan terhadap kinerja suatu Perusahaan, tidak terkecuali pada Perusahaan minyak dan gas bumi yang semakin berkembang setiap tahunnya. Demikian halnya pada PT Purnama Semesta Alamiah sebagai Perusahaan yang bergerak di bidang LPG juga perlu menerapkan prinsip-prinsip Good Corporate Governance (GCG).Penelitian ini bertujuan untuk mengetahui sejauh mana penerapan prinsip-prinsip Good Corporate Governance pada PT. Purnama Semesta Alamiah. Penelitian ini menggunakan jenis penelitian kualitatif. Pengumpulan data dilakukan dengan menggunakan teknik wawancara dengan Menggunakan informan sebagai sumber informasi. Data yang diperoleh kemudian diolah dan dibahas menggunakan deskriptif kualitatif. Hasil dalam penelitian ini menunjukkan bahwa PT. Purnama Semesta Alamiah sudah menerapkan prinsip-prinsip Good Corporate Governance sesuai dengan prinsip transparency, accountability,responsibility, independency, dan fairness

Black Rings in Taub-NUT

We construct the most generic three-charge, three-dipole-charge, BPS black-ring solutions in a Taub-NUT background. These solutions depend on seven charges and six moduli, and interpolate between a four-dimensional black hole and a five-dimensional black ring. They are also instrumental in determining the correct microscopic description of the five-dimensional BPS black rings.Comment: 16 pages, harvma

Juvenile Delinquency in Novel Clockwork Orange by Anthony Burgess

The study aimed to reveal the role of literary work, especially a novel in reflecting the social fenomena, the juvenile delinquency in the twentieth century. The data source was an English novel ‘Clockwork Orange\u27 written by Anthony Burgess. The research applied library research by using reflection theory introduced by Georg Lukacs. Analysis was presented in three parts, those were the identification of major character, social setting, and the reflection of juvenile delinquency.The findings were as follows. First, the major character was Alex as his hig intensity in all the events that build the whole story. Second, the social setting described the life of teenagers, especially the juvenile delinquency as social fenomena in society. Third, the role of literary work in revealing the problem above faced by the twentieth century society. Finally, it can be concluded that the literary work has played a very important role in revealing the social fenomena

The Nuts and Bolts of Einstein-Maxwell Solutions

We find new non-supersymmetric solutions of five-dimensional ungauged supergravity coupled to two vector multiplets. The solutions are regular, horizonless and have the same asymptotic charges as non-extremal charged black holes. An essential ingredient in our construction is a four-dimensional Euclidean base which is a solution to Einstein-Maxwell equations. We construct stationary solutions based on the Euclidean dyonic Reissner-Nordstrom black hole as well as a six-parameter family with a dyonic Kerr-Newman-NUT base. These solutions can be viewed as compactifications of eleven-dimensional supergravity on a six-torus and we discuss their brane interpretation.Comment: 29 pages, 3 figure