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- Seminar by Igor Smolic

The central topic of the talk were interesting properties of CCD Charge Coupled Device camera linearity of photometric response signal to noise ratio SNR sensitivity architecture usage in astronomy covered with examples CCD camera Pdf News 12 February 2016 SCL Seminar by Jelena Smiljanic 12 January 2016 In memoriam Nikola Buric 28 December 2015 SCL Seminar by Milos Radonjic 25 December 2015 SCL Seminar by Milan Radonjic 18 December 2015

Original URL path: http://www.scl.rs/news/284-seminar-by-igor-smolic (2016-02-10)

Open archived version from archive - SCL seminar by A. Balaz

potential in the path integral formalism and using the recursion approach based on the Schrödinger equation for transition amplitudes The effective potential is first derived for a simple one particle one dimensional system and then generalized to many body systems This approach is ideally suited for the study of quantum dynamics of systems in time dependent external fields rotating systems or systems described by the Gross Pitaevskii type of equations

Original URL path: http://www.scl.rs/news/289-scl-seminar-by-a-balaz (2016-02-10)

Open archived version from archive - Seminar by Ivana Vidanovic

Ivana Vidanovic presented the status of the ongoing research performed in collaboration with SCL s Antun Balaz and Axel Pelster from University of Duisburg Essen Implications of the presented numerical results together with possible further research directions were discussed News 12 February 2016 SCL Seminar by Jelena Smiljanic 12 January 2016 In memoriam Nikola Buric 28 December 2015 SCL Seminar by Milos Radonjic 25 December 2015 SCL Seminar by Milan

Original URL path: http://www.scl.rs/news/534-seminar-by-ivana-vidanovic (2016-02-10)

Open archived version from archive - Seminar by Emanouil Atanassov

Sciences on 23 December 2009 The talk was entitled Quasi Monte Carlo Methods for Integrals and Integral Equations and presented main features implementation details and advantages of quasi Monte Carlo methods in comparison with the standard Monte Carlo approach News 12 February 2016 SCL Seminar by Jelena Smiljanic 12 January 2016 In memoriam Nikola Buric 28 December 2015 SCL Seminar by Milos Radonjic 25 December 2015 SCL Seminar by Milan

Original URL path: http://www.scl.rs/news/548-seminar-by-emanouil-atanassov (2016-02-10)

Open archived version from archive - Seminar by Marina Marinkovic

2009 In the seminar talk entitled Lattice QCD Fundamental Parameters of Quantum Chromodynamics from Non perturbative Methods Marina Marinkovic presented basic ideas behind the lattice approach to QCD and gave overview of the current state of the art in this field with the emphasis on numerical algorithms used in large scale QCD simulations Abstract of the talk In elementary particle physics lattice QCD is one of the standard tools for studying the fundamental quantum field theory of quarks and gluons Quantum Chromodynamics In order to discuss it in a mathematically well defined way the theory has to be regularized Replacing space time by an Euclidean lattice has proven to be an efficient non perturbative regularization which makes possible both theoretical understanding and computational analysis This approach convincingly demonstrates quark confinement and allows for obtaining crucial properties of the strong interactions from first principles such as the running of the strong coupling and quark masses The field is rapidly evolving and besides an introductory presentation some of ongoing efforts mainly focused on algorithmic developments are outlined in this talk News 12 February 2016 SCL Seminar by Jelena Smiljanic 12 January 2016 In memoriam Nikola Buric 28 December 2015 SCL Seminar by

Original URL path: http://www.scl.rs/news/549-seminar-by-marina-marinkovic (2016-02-10)

Open archived version from archive - Seminar by Nikola Paunkovic

case of quantum phase transitions we show on the examples of the Dicke and the XY models that approaching the regions of criticality the fidelity between two neighboring ground states exhibits a dramatic drop In the case of general thermal phase transitions we make the analytical study of the Hubbard Stoner model of itinerant magnetism and the BCS model of superconductivity showing that the sudden drop of the mixed state fidelity between two neighboring global thermal states marks the line of the phase transition We conduct a detailed analysis of the general case of systems given by mutually commuting Hamiltonians where the non analyticity of the fidelity is directly related to the non analyticity of the relevant response functions susceptibility and heat capacity for the case of symmetry breaking transitions Further on the case of BCS theory of superconductivity given by mutually non commuting Hamiltonians we analyze the structure of the system s eigenvectors in the vicinity of the line of the phase transition showing that their sudden change is quantified by the emergence of a generically non trivial Uhlmann mixed state geometric phase the mixed state generalization of the Berry geometric phase Finally we make the numerical study of

Original URL path: http://www.scl.rs/news/551-seminar-by-nikola-paunkovic (2016-02-10)

Open archived version from archive - Seminar by Mark Oliver Goerbig

graphene where the low energy electronic properties are governed by the relativistic Dirac rather than a Schrödinger equation It has recently been argued that Dirac fermions would also be responsible for the particular electronic properties in the layered organic material α BEDT TTF 2 I 3 whose temperature dependent transport hints at a narrow or zero semiconductor under pressure An interesting difference as compared to graphene arises from the tilt of the anisotropic Dirac cones in this material which has been obtained in a tight binding calculation The talk will discuss the origins of this tilt as well as its consequence for the Landau level quantisation in a strong magnetic field Surprisingly the effect of the tilt yields the same modification of the Landau levels as an in plane electric field for the case of non tilted cones which lowers indeed the Landau level spacing as a consequence of an underlying Lorentz invariance Whereas neither the tilt of the Dirac cones nor the in plane electric field may lift on their own the twofold valley degeneracy in these systems the combination of the two achieves such as degeneracy lifting This scenario may eventually be tested with the help of infrared

Original URL path: http://www.scl.rs/news/552-seminar-by-mark-oliver-goerbig (2016-02-10)

Open archived version from archive - Seminar by Nicolas Regnault

settling this question We will show the theoretical evidences that indicate excitations of some fractional quantum Hall phases may obey such exotic statistics While a large part of these arguments are based on numerical calculations we will point out limitations of such an approach We will try to describe some proposals to differentiate phases from finite size calculations The complete information of a state lies in its symmetric monomial decomposition

Original URL path: http://www.scl.rs/news/554-seminar-by-nicolas-regnault (2016-02-10)

Open archived version from archive