We study the magnetic analogue of Myersâ€™ Dielectric Effect and, in some cases, relate it to the blowing up of particles into branes, first investigated by Greevy, Susskind and Toumbas. We show thatâ€¦ (More)

The Groenwald-Moyal plane is the algebra AÎ¸(R) of functions on Rd+1 with the âˆ—-product as the multiplication law, and the commutator [xÌ‚Î¼, xÌ‚Î½ ] = iÎ¸Î¼Î½ (Î¼, Î½ = 0, 1, ..., d) between the coordinateâ€¦ (More)

The Groenewold-Moyal plane is the algebra AÎ¸(R) of functions on Rd+1 with the âˆ—-product as the multiplication law, and the commutator [xÌ‚Î¼, xÌ‚Î½ ] = iÎ¸Î¼Î½ (Î¼, Î½ = 0, 1, ..., d) between the coordinateâ€¦ (More)

We investigate the thermodynamics of a four-dimensional charged black hole in a finite cavity in asymptotically flat and asymptotically de Sitter space. In each case, we find a Hawking-Page-likeâ€¦ (More)

In continuum physics, there are important topological aspects like instantons, Î¸-terms and the axial anomaly. Conventional lattice discretizations often have difficulties in treating one or the otherâ€¦ (More)

By considering scalar theories on the fuzzy sphere as matrix models, we construct a renormalization scheme and calculate the one-loop effective action. Because of UV-IR mixing, the two-and theâ€¦ (More)

We discuss, in terms of the AdS3-CFT2 correspondence, a one-parameter family of (asymptotically AdS3) conical geometries which are generated by point masses and interpolate between AdS3 and BTZâ€¦ (More)

We study the time-independent modes of a massless scalar field in various black hole backgrounds, and show that for these black holes, the time-independent mode is localized at the horizon. A similarâ€¦ (More)

Dp-branes placed in a certain external RR (p+4)-form field expand into a transverse fuzzy two-sphere, as shown by Myers. We find that by changing the (p + 4)-form background other fuzzy cosets can beâ€¦ (More)