[phys4phys] Group for Gravitation, Particle and Fields seminar, Friday 28 April 2023

[Marija Dimitrijevic Ciric]

Dear colleagues,

You are cordially invited to the seminar of the Group for Gravitation, 
Particles and Fields, which will be held on Friday, 28 April 2023 at 
11:00 at the Faculty of Physics, lecture hall 665.


The talk entitled

On Quantum States Over Time

will be given by Dr. James Fullwood (School of Mathematical Sciences, 
Shanghai Jiao Tong University).

Abstract: While in relativity theory space evolves over time into a 
single entity known as spacetime, quantum theory lacks a standard notion 
of how to encapsulate the dynamical evolution of a quantum state into a 
single "state over
time". Recently there is an emerging interest in the formulation of such 
dynamical quantum states, resulting in various approaches to their 
construction. In our work with Arthur Parzygnat, we have developed a 
general approach which
we have recently shown is equivalent to the pseudo-density matrix 
formalism of Fitzsimons, Jones and Vedral, which was initially 
introduced to treat temporal and spatial correlations in quantum theory 
on equal footing. In this talk,
we review the general theory of such states over time, and go over some 
recent applications, such as a dynamical quantum Bayes' rule, 
time-reversal for quantum systems, and quantum mechanical world lines. 
We then conclude with some
ideas on how quantum states over time may yield "spacetime states" 
associated with a causal set.



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Time: April 28, 2023 11:00 Belgrade

Faculty of Physics, lecture hall 665, 3rd floor

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Best regards,

Marija Dimitrijevic Ciric

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