Physics Commons^™

Fluctuations In A Cosmology With A Spacelike Singularity And Their Gauge Theory Dual Description, Robert H. Brandenberger, Elisa G.M. Ferreira, Ian A. Morrison, Yi-Fu Cai, Sumit R. Das, Yi Wang

Ian Morrison

We consider a time-dependent deformation of anti–de Sitter (AdS) space-time which contains a spacelike “singularity”—a spacelike region of high curvature. Making use of the AdS/CFT correspondence we can map the bulk dynamics onto the boundary. The boundary theory has a time dependent coupling constant which becomes small at times when the bulk space-time is highly curved. We investigate the propagation of small fluctuations of a test scalar field from early times before the bulk singularity to late times after the singularity. Under the assumption that the AdS/CFT correspondence extends to deformed AdS space-times, we can map the bulk evolution of …

Neutron-Antineutron Oscillations: Theoretical Status And Experimental Prospects, David G. Phillips, William M. Snow, Kaladi Babu, S. Banerjee, David V. Baxter, Zurab Berezhiani, Marc Bergevin, Satyaki Bhattacharya, Gustaaf Brooijmans, Luis Castellanos, Mark C. Chen, C.E. Coppola, Ramanath K. Cowsik, J.A. Crabtree, Pragya Das, Eric Dees, Aleksander D. Dolgov, Phillip D. Ferguson, Matthew Frost, Tony A. Gabriel, A. Gal, Franz X. Gallmeier, Kenneth S. Ganezer, E. Golubeva, Geoffrey L. Greene, B. Hartfiel, Ayman Hawari, Lawrence H. Heilbronn, Colin D. Johnson, Yu A. Kamyshkov, Boris O. Kerbikov, Masaaki Kitaguchi, B.Z. Kopeliovich, V.B. Kopeliovich, Vadim A. Kuzmin, Chenyu Liu, P. Mcgaughey, M. Mocko, Rabindra N. Mohapatra, Nikolai V. Mokhov, Guenter Muhrer, H.P. Pieter Mumm, Lev B. Okun, Robert W. Pattie, C. Quigg, E. Ramberg, A. Ray, A. Roy, A. Ruggles, U. Sarkar, Andy Saunders, A. P. Serebrovv, H. M. Shimizu, R. Shrock, A. K. Sikdara, Sky Sjue, S. Striganov, L. W. Townsend, R. Tschirhart, A. Vainshtein, R Van Kooten, Z. Wang, A. R. Young

Robert W. Pattie Jr.

Holographic Renormalization Of Asymptotically Lifshitz Spacetimes, Robert Mcnees, Robert Mann

Robert A McNees IV

A variational formulation is given for a theory of gravity coupled to a massive vector in four dimensions, with Asymptotically Lifshitz boundary conditions on the fields. For theories with critical exponent z=2 we obtain a well-defined variational principle by explicitly constructing two actions with local boundary counterterms. As part of our analysis we obtain solutions of these theories on a neighborhood of spatial infinity, study the asymptotic symmetries, and consider different definitions of the boundary stress tensor and associated charges. A constraint on the boundary data for the fields figures prominently in one of our formulations, and in that case …

Black Holes In The Conical Ensemble, Robert Mcnees, Daniel Grumiller

Robert A McNees IV

We consider black holes in an “unsuitable box”: a finite cavity coupled to a thermal reservoir at a temperature different than the black hole’s Hawking temperature. These black holes are described by metrics that are continuous but not differentiable due to a conical singularity at the horizon. We include them in the Euclidean path integral sum over configurations, and analyze the effect this has on black hole thermodynamics in the canonical ensemble. Black holes with a small deficit (or surplus) angle may have a smaller internal energy or larger density of states than the nearby smooth black hole, but they …

Conventions, Definitions, Identities, And Other Useful Formulae, Robert Mcnees

Robert A McNees IV

As the name suggests, these notes contain a summary of important conventions, definitions, identities, and various formulas that I often refer to. They may prove useful for researchers working in General Relativity, Supergravity, String Theory, Cosmology, and related areas.

Boundary Terms Unbound! Holographic Renormalization Of Asymptotically Linear Dilaton Gravity, Robert Mcnees, Robert Mann

Robert A McNees IV

A variational principle is constructed for gravity coupled to an asymptotically linear dilaton and a p-form field strength. This requires the introduction of appropriate surface terms—also known as 'boundary counterterms'—in the action. The variation of the action with respect to the boundary metric yields a boundary stress tensor, which is used to construct conserved charges that generate the asymptotic symmetries of the theory. In most cases a minimal set of assumptions leads to a unique set of counterterms. However, for certain examples we find families of actions that depend on one or more continuous parameters. We show that the conserved …