Exact Results in Quantum Theory & Gravity

Ścisłe rezultaty teorii kwantów i grawitacji

2015/2016


prof. dr hab. Jan Dereziński, prof. dr hab. Krzysztof Meissner
dr Wojciech Kamiński, dr Grzegorz Łach
Pasteura 5, room 1.03, Fridays 14:15 - < 16:00


On
Friday, 24.03.2017
Mehdi Assanioussi (IFT UW)
will give a talk
Approximation methods for the dynamics in deparametrized LQG models

Abstract: An important aspect in understanding the dynamics in LQG in the context of deparametrized models is to obtain a sufficient control on the quantum evolution generated by a given Hamiltonian operator. More specifically, we need to be able to compute the evolution of relevant physical states and observables with a relatively good precision. In this talk, I present an approximation method to deal with the physical Hamiltonian operators in the context of (time) deparametrized LQG models, and discuss two known models as examples. This method is using standard time-independent perturbation theory to define a perturbative expansion of a Hamiltonian operator, the small perturbation parameter being determined by the Barbero-Immirzi parameter. This method allows us to approximate transition amplitudes and to evolve expectation values of geometrical operators over a certain time interval.
Date Speaker Title Slides
07.10.2016 Grzegorz Łach Principle of the conservation of effort and how to bypass it
 
14.10.2016 Antoine Géré A 3D toy model for noncommutative theories
 
21.10.2016 Marcin Napiórkowski From Many-Body Quantum Mechanics to Gross-Pitaevskii equation and beyond
 
28.10.2016 Michał Wrochna Quantum fields on asymptotically de Sitter spacetimes and their extension across the conformal horizon
 
04.11.2016 Pawel Jakubczyk Functional renormalization group perspective on the Berezinskii-Kosterlitz-Thouless transition
 
11.11.2016 - Independence Day
 
18.11.2016 Maciej Nieszporski Proper discretizations of differential equations
 
25.11.2016 Krzysztof Wohlfeld On the relations between the basic models of the correlated electrons systems on a lattice
 
02.12.2016 Daniel Siemssen Propagators
 
09.12.2016 Petr Hořava TBA
 
16.12.2016 Chun-Yen Lin Transition Amplitudes with Quantum Dynamical Spacetimes
 
21.12.2016 Hermann Nicolai Cosmobilliards
 
13.01.2017 Jacek Wosiek Beyond complex Langevin equations: from simple examples to positive representation of Feynman path integrals directly in Minkowski time
 
20.01.2017 Krzysztof Wohlfeld On the relations between the basic models of the correlated electrons systems on a lattice, part II
 
03.03.2017 Jochen Zahn Gauge Theory in Background Fields
 
10.03.2017 Jacopo De Nardis Emerging non-equilibrium dynamics of integrable systems
 
17.03.2017 Krzysztof Meissner Conformal anomalies
 
24.03.2017 Mehdi Assanioussi TBA
 
31.03.2017 Grzegorz Łach Non-adiabatic Perturbation Theory
 
07.04.2017 Andrzej Görlich TBA
 
14.04.2017 - Easter
 
21.04.2017 stringtheory.pl TBA
 
28.04.2017 Rafał Demkowicz-Dobrzanski TBA
 
05.05.2017 Jan Dereziński Toy model of renormalisation group
 
12.05.2017 Chris Fewster (U. York) New results on the Unruh effect
 
19.05.2017 Pawel Kasprzak and Krzysztof Kazimierczuk TBA