[institut] seminar gruope za cestice i gravitaciju

[Branislav Cvetkovic]

Postovane kolege,

u petak 17. marta u 11 h na Institutu za fiziku, u sali 360, Marko 
Vojinovic ce odrzati seminar pod naslovom
"Quantum entanglement between gravity and matter". Apstrakt vam 
prosledjujem u nastavku.

Pozdrav Branislav

Abstract: We show that gravitational and matter fields are always 
entangled, as a consequence of local Poincare symmetry. This 
entanglement is not of dynamical origin, as is common for interacting 
quantum systems, but rather of kinematical origin, enforced by gauge 
symmetry at the quantum level. We will give a general argument why one 
should expect the symmetry-protected entanglement in quantum gravity 
theories, and then support it by demonstrating explicitly that the 
Hartle-Hawking state is entangled, in the framework of the Regge quantum 
gravity model. These results may have various interesting consequences, 
including the universal gravitational decoherence of matter and a 
possible small violation of the weak equivalence principle.
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Dr. Marko Vojinovic
Group for Gravitation, Particles and Fields
Institute of Physics
University of Belgrade
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home page: www.markovojinovic.com
e-mail:    vmarko at ipb.ac.rs

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Institute of Physics Belgrade
Pregrevica 118, 11080 Belgrade, Serbia
http://www.ipb.ac.rs/