Exact Results in Quantum Theory & Gravity

Friday,16.10.2015

Jan Derezinski
On the excitation spectrum of quantum gases II

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Abstract: A lot of physical and mathematical information about quantum gases at zero temperature in large volume is encoded in the spectral properties of their Hamiltonian and their total momentum. The joint spectrum of these commuting self-adjoint operators after the subtraction of the ground state energy can be called the excitation spectrum. One can conjecture that in some situations the excitation spectrum should have an interesting shape characterized by a positive critical velocity, which is related to superfluidity.




Schedule for Fall 2014 & Spring 2015

Date	Speaker	Title	Slides
03.10.2014	Bianca Dittrich	A new surface based representation for loop quantum gravity
10.10.2014	Andrzej Dragan	Relativistic quantum information - an overview
17.10.2014	Casey Tomlin	A novel weak-coupling limit of Euclidean gravity II: The quantum constraint algebra and some speculative remarks
24.10.2014	Satoshi Nawata	Quantum 6j-symbols
31.10.2014	Masahide Manabe	Penner model, topological recursion, and quantum spectral curve
07.11.2014	Adrian Lewandowski	The hierarchy problem
14.11.2014	Krzysztof A. Meissner	Exact calculations in Quantum Field Theory
21.11.2014	Daniel Siemssen	Quantum field theory on curved spacetime and the semiclassical Einstein equation
28.11.2014	Jonathan Engle	Diffeomorphism invariant loop quantum gravity and cosmology
05.12.2014	Vojtech Patkos	Radiative corrections to atomic spectra
12.12.2014	Andrzej Okolow	Construction of spaces of quantum states for field theories via projective techniques - examples
19.12.2014	Grzegorz Lach	High precision calculations for 1-2 nuclei and 1-2 electrons
09.01.2015	Hanno Sahlmann	Gaussian measures on connections and their continuity properties
16.01.2015	Suzanne Lanery	Projective Quantum State Spaces for Theories of Connections
23.01.2015	Mariusz Puchalski	Explicitly correlated methods in light atomic and molecular systems
30.01.2015		Break
06.02.2015		Break
13.02.2015		Break
20.02.2015		Break
27.02.2015	Rodrigo Vargas	Quantum Field Theory without Feynman Diagrams
06.03.2015	Prof. Neil Lambert (King's College, London)	An introduction to string theory and M-theory
13.03.2015	Prof. Neil Lambert (King's College, London)	An introduction to string theory and M-theory
20.03.2015	Prof. Neil Lambert (King's College, London)	An introduction to string theory and M-theory
27.03.2015	Grzegorz Lach	Residual entropy of ice
03.04.2015		Break
10.04.2015	Kasia Rejzner	Quantization of relative observables in perturbative algebraic QFT
17.04.2015	Ryszard Kostecki	Quantum information geometry for quantum foundations
24.04.2015	Norbert Bodendorfer	Symmetry reductions in loop quantum gravity based on classical gauge fixings
01.05.2015		Holiday
08.05.2015		Juwenalia
15.05.2015	Aleksander Wolszczan	Searching for radio flares from ultracool dwarfs and exoplanets
22.05.2015	Prof. Neil Lambert (King's College, London)	Introduction to Superstring Theory Part II
29.05.2015	Prof. Neil Lambert (King's College, London)	Introduction to Superstring Theory Part II
2.10.2015	Jan Derezinski	On the excitation spectrum of quantum gases I
9.10.2015	Adam Latosiński	Gauge covariant propagators: derivation and applications
16.10.2015	Jan Dereziński	On the excitation spectrum of quantum gases II
23.10.2015	Vladimir Yerokhin	Bound-electron g factor in light ions
30.10.2015	Alfred Michel Grundland (Université de Montréal)	Soliton surfaces in the symmetry approach
06.11.2015	Grzegorz Łach (IFT UW)	Casimir Friction
13.11.2015	Johannes Thürigen (MPI Potsdam)	Spin-foam sums for all Loop Quantum Gravity
20.11.2015	Pawel Czachorowski (IFT UW)	Explicitly correlated exponential functions for H2 molecule - the Taylor series algorithm
27.11.2015	—	'100 Years of General Relativity' conference
04.12.2015	—	'Scalars' conference
11.12.2015	Ingo Runkel (Universität Hamburg)	Defects as dictionary
18.12.2015	—	IFT symposium
08.01.2016	Adrian Lewandowski (IFT UW)	Chiral anomaly in nonlocal regularization
15.01.2016	Jaromir Panas (IFT UW)	Dynamical mean-field theory study of the Bose-Hubbard model
22.01.2016	Wojciech Kamiński (IFT UW)	Asymptotics of classical 6-j and 10-j symbols
26.02.2016	Carmen Li (Penn State Univ.)	Transverse deformations of extreme horizons
04.03.2016	Marek Napiórkowski (IFT UW)	Critical Casimir forces and Bose-Einstein condensaton in an imperfect Bose gas
11.03.2016	Piotr Sułkowski (IFT UW)	Quantization, matrix models, and conformal field theory
18.03.2016	Javier De Lucas Araujo (IFT UW)	Lie systems and geometric phases
25.03.2016	—	Good Friday
01.04.2016	Junya Yagi	Quiver gauge theories, TQFTs and integrable lattice models
08.04.2016	Daniel Siemssen	The Potential in General Linear Electrodynamics: Causal Structure, Propagators and Quantization
15.04.2016	Wojciech Kamiński (IFT UW)	Stress-energy tensor in QFT on curved background
22.04.2016	Leszek Stolarczyk (WCh UW)	Quasiparticle model of many-fermion systems based on the Coupled-Cluster Ansatz, part I
29.04.2016	Leszek Stolarczyk (WCh UW)	Quasiparticle model of many-fermion systems based on the Coupled-Cluster Ansatz, part II
06.05.2016	—	'Juwenalia'
13.05.2016	Axel Cortez Cubero	In and out of equilibrium thermodynamics of planar field theories: exact results
20.05.2016	Andrzej Dragan	Something quantum and relativistic
27.05.2016	—
03.06.2016	Grzegorz Łach (IFT UW)	Atom-atom interactions with retardation and without Born-Oppenheimer approximation
10.06.2016	Miłosz Panfil	Quench Dynamics in Two-Dimensional (Integrable) SUSY Models