CWRU PAT Coffee Agenda

Tuesdays 10:30 - 11:30 | Fridays 11:30 - 12:30

+3 Causality Constraints on Massive Gravity.

kjh92 +1 jtd55 +1 sxk1031 +1

+3 Lindblad Decoherence in Atomic Clocks.

oxg34 +1 kjh92 +1 gds6 +1

+3 Cyclic anamorphic cosmology.

kxp265 +1 gds6 +1 lxj154 +1

+1 Standard Model-Axion-Seesaw-Higgs Portal Inflation. Five problems of particle physics and cosmology solved in one stroke.

sxk1031 +1

+1 Atom Interferometry in a Warm Vapor.

gds6 +1

+1 Will a decaying atom feel a friction force?.

oxg34 +1

+1 Constraints on neutrino masses from the study of the nearby large-scale structure and galaxy cluster counts.

gds6 +1

Showing votes from 2016-10-07 12:30 to 2016-10-11 11:30 | Next meeting is Tuesday Aug 19th, 10:30 am.

users

  • No papers in this section today!

astro-ph.CO

  • Causality Constraints on Massive Gravity.- [PDF] - [Article]

    Xian O. Camanho, Gustavo Lucena Gomez, Rakibur Rahman
     

    The parameter space of the de Rham-Gabadadze-Tolley massive gravity ought to be constrained essentially to a line. The theory is shown to admit pp-wave backgrounds on which linear fluctuations otherwise undergo significant time advances, potentially leading to closed time-like curves. This classical phenomenon takes place well within the theory's validity regime.

astro-ph.HE

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astro-ph.GA

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astro-ph.IM

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gr-qc

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hep-ph

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hep-th

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hep-ex

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quant-ph

  • Will a decaying atom feel a friction force?.- [PDF] - [Article]

    Matthias Sonnleitner, Nils Trautmann, Stephen M. Barnett
     

    We show how a simple calculation leads to the surprising result that an excited two-level atom moving through vacuum sees a tiny friction force of first order in v/c. At first sight this seems to be in obvious contradiction to other calculations showing that the interaction with the vacuum does not change the velocity of an atom. It is yet more surprising that this change in the atom's momentum turns out to be a necessary result of energy and momentum conservation in special relativity.

other

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