[institut] [phys4phys] Group for Gravitation, Particle and Fields on-line seminar, Friday 20 May 2022

[Marija Dimitrijevic Ciric]

Dear colleagues,

You are cordially invited to the online seminar of the Group for 
Gravitation, Particles and Fields, which will be held on Friday, 20 May 
2022 at 11:15 via the BigBlueButton platform (link is given below).

The talk entitled

A review of a few results at the interplay between quantum gravity and 
quantum information theory


will be given by Marko Vojinovic (Institute of Physics Belgrade).

Abstract: I will give a review of two (if time permits maybe three) 
results obtained in collaboration with Nikola Paunkovic, on research at 
the intersection between quantum gravity (QG) and quantum information 
theory (QI). The first result deals with the possible space of states in 
an abstract QG formalism, and the restrictions imposed by gauge 
symmetry, specifically diffeomorphisms. It turns out that these 
restrictions generically rule out gravity-matter product states as 
gauge-noninvariant. The second result deals with the motion of a 
point-particle in QG, in particular in a background gravitational field 
constructed as a quantum superposition of two distinct spacetime 
geometries. The resulting trajectory of the particle fails to be 
described by a geodesic equation with respect to either geometry, giving 
rise to a correction term due to quantum interference between two 
geometries. We will discuss the consequences of this for the weak 
equivalence principle. Finally, we may briefly mention a few other 
recent results trending in the QI community, such as the quantum switch 
protocol, del Santo-Dakic protocol, and their relationship to QG.



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Time: May 20, 2022 11:15 Belgrade

https://gravityserver.ipb.ac.rs/b/mar-xoo-t1v-vwn

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Best regards,

Marija Dimitrijevic Ciric

University of Belgrade
Faculty of Physics
Studentski trg 12-16
11000 Belgrade
Serbia