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LTT: N. Huggett

November 8, 2021 @ 11:10 am - 12:30 pm EST

  • « LTT: S. Varga
  • LTT: M. Parker »

Nick Huggett, LAS Distinguished Professor of Philosophy, University of Illinois at Chicago

Quantum Gravity on a Tabletop?

ABSTRACT: The characteristic – Planck – energy scale of quantum gravity is utterly beyond current technology, making experimental access to the relevant physics apparently impossible. Nevertheless, low energy experiments linking gravity and the quantum have been undertaken: the Page and Geilker quantum Cavendish experiment, and the Colella-Overhauser-Werner neutron interferometry experiment, say. However, neither probes states in which gravity remains in a coherent quantum superposition – unlike recent proposals that have created considerable interest among physicists. In essence, if two initially unentangled systems interacting solely via gravity become entangled, then, according to a simple theorem of quantum mechanics, gravity must quantum. Clearly there are formidable challenges to creating such a system, but remarkably, tabletop technology into the gravitational fields of very small bodies has advanced to the point that such an experiment might be feasible in the next several years. In this talk I will explain the proposal and what it aims to show, highlighting the important ways in which it is theory-laden. (Drawn from joint work with Niels Linnemann and Mike Schneider.)

Please Note: Non-Pitt individuals who want to attend our in-person talks must send an email in advance to Katie Labuda (kathleenlabuda@pitt.edu) requesting Guest Building Access, or you will not be able to enter the Cathedral of Learning.

If you prefer to watch on Zoom, please register here: https://pitt.zoom.us/webinar/register/WN_4fJS8BW3S1yiKcdqRzmjNA

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Details

Date:
November 8, 2021
Time:
11:10 am - 12:30 pm EST
Event Categories:
Lunchtime Talks, Lunchtime Talks 2021-22
Event Tags:
ltt

Venue

1117 Cathedral of Learning
4200 Fifth Ave
Pittsburgh, PA 15260 United States
  • « LTT: S. Varga
  • LTT: M. Parker »
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