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General Covariance in Gravity at a Lifshitz Point
Petr Horava
This paper is based on the invited talks delivered by the author at GR 19: the 19th International Conference on General Relativity and Gravitation, Ciudad de México, México, July 2…
Spectral Dimension of the Universe in Quantum Gravity at a Lifshitz Point
Petr Horava
We extend the definition of "spectral dimension" (usually defined for fractal and lattice geometries) to theories on smooth spacetimes with anisotropic scaling. We show that in qua…
Quantum Gravity at a Lifshitz Point
Petr Horava
We present a candidate quantum field theory of gravity with dynamical critical exponent equal to z=3 in the UV. (As in condensed matter systems, z measures the degree of anisotropy…
Membranes at Quantum Criticality
Petr Horava
We propose a quantum theory of membranes designed such that the ground-state wavefunction of the membrane with compact spatial topology Σ_h reproduces the partition function of the…
M-Theory Through the Looking Glass: Tachyon Condensation in the E_8 Heterotic String
Petr Horava, Cynthia A. Keeler
We study the spacetime decay to nothing in string theory and M-theory. First we recall a nonsupersymmetric version of heterotic M-theory, in which bubbles of nothing -- connecting…
Closed-String Tachyon Condensation and the Worldsheet Super-Higgs Effect
Petr Horava, Cynthia A. Keeler
Alternative gauge choices for worldsheet supersymmetry can elucidate dynamical phenomena obscured in the usual superconformal gauge. In the particular example of the tachyonic $E_8…