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Instability of the Noncommutative Geometry Inspired Black Hole
Eric Brown, Robert B. Mann
Non-commutative geometries have been proposed as an approach to quantum gravity and have led to the construction of non-commutative black holes, whose interior singularities are pu…
Using Berry's phase to detect the Unruh effect at lower accelerations
E. Martin-Martinez, I. Fuentes, R. B. Mann
We show that a detector acquires a Berry phase due to its motion in spacetime. The phase is different in the inertial and accelerated case as a direct consequence of the Unruh effe…
Analysis of Two-Particle Systems in 2 + 1 Gravity Through Hamiltonian Dynamics
Alexandre Yale, R. B. Mann, Tadayuki Ohta
We study the dynamics of particles coupled to gravity in (2 + 1) dimensions. Using the ADM formalism, we derive the general Hamiltonian for an N-body system and analyze the dynamic…
Pathologies in Asymptotically Lifshitz Spacetimes
Keith Copsey, Robert Mann
There has been significant interest in the last several years in studying possible gravitational duals, known as Lifshitz spacetimes, to anisotropically scaling field theories by a…
Entanglement of Dirac fields in an expanding spacetime
I. Fuentes, R. B. Mann, E. Martin-Martinez +1
We study the entanglement generated between Dirac modes in a 2-dimensional conformally flat Robertson-Walker universe. We find radical qualitative differences between the bosonic a…
Any quantum state can be cloned in the presence of closed timelike curves
D. Ahn, T. C. Ralph, R. B. Mann
The possible existence of closed timelike curves (CTCs) draws attention to fundamental questions about what is physically possible and what is not. An example is the "no cloning th…