3 years ago

A bare quantum null energy condition.

Donald Marolf, Zicao Fu

The quantum null energy condition (QNEC) is a conjectured relation between a null version of quantum field theory energy and derivatives of quantum field theory von Neumann entropy. In some cases divergences cancel between these two terms and the QNEC is intrinsically finite. We study the more general case here where they do not, and argue that a QNEC can still hold for bare (unrenormalized) quantities. While the original QNEC applied only to locally stationary null congruences in backgrounds that solve semi-classical theories of quantum gravity, at least in formal perturbation theory in small Planck length, the quantum focusing conjecture can be viewed as the special case of our bare QNEC for which the metric is on-shell.

Publisher URL: http://arxiv.org/abs/1711.02330

DOI: arXiv:1711.02330v3

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