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The Classical Equations of Motion of Quantized Gauge Theories, Part 2: Electromagnetism
David E. Kaplan, Tom Melia, Surjeet Rajendran
In this and companion papers, we show that quantum field theories with gauge symmetries permit a broader class of classical dynamics than typically assumed. In this article, we sho…
The Classical Equations of Motion of Quantized Gauge Theories, Part I: General Relativity
David E. Kaplan, Tom Melia, Surjeet Rajendran
In this and a companion paper, we show that quantum field theories with gauge symmetries permit a broader class of classical dynamics than typically assumed. In this article, we sh…
A Causal Framework for Non-Linear Quantum Mechanics
David E. Kaplan, Surjeet Rajendran
We add non-linear and state-dependent terms to quantum field theory. We show that the resulting low-energy theory, non-linear quantum mechanics, is causal, preserves probability an…
Firewalls in General Relativity
David E. Kaplan, Surjeet Rajendran
We present spherically symmetric solutions to Einstein's equations which are equivalent to canonical Schwarzschild and Reissner-Nordstrom black holes on the exterior, but with sing…
Born Again Universe
Peter W. Graham, David E. Kaplan, Surjeet Rajendran
We present a class of nonsingular, bouncing cosmologies that evade singularity theorems through the use of vorticity in compact extra dimensions. The vorticity combats the focusing…
A Symmetry for the Cosmological Constant
David E. Kaplan, Raman Sundrum
We study a symmetry, schematically Energy -> - Energy, which suppresses matter contributions to the cosmological constant. The requisite negative energy fluctuations are identified…