HIP NEWS December 21st 2015
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HIP Staff News
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Dr. Tuomas Lappi of U. Jyväskylä, HIP QCD project leader, has been awarded an ERC consolidator grant for five years. Congratulations.
Update your information in Tuhat
————————————————–
Permanently employed teaching and research staff are requested to update their information in the Tuhat database by 11 January 2016.
https://flamma.helsinki.fi/en/notifications/update-your-information-in-tuhat
HIP NEWS December 14th 2015
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HIP STAFF NEWS
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MSc. (Tech.) Juska Pekkanen was awarded the 2015 Fundamental Physics Special
Recognition Award by the CMS spokepersons Joseph Incandela and Tiziano Camporesi
7.12.2015 at the opening plenary session of CMS Physics Week at CERN. The
special recognition is due to Juska’s appreciated efforts in jet calibration
studies and his major contributions to the recently submitted dijet resonance
search result that is the first public new physics search with 13 TeV
proton-proton collisions (http://arxiv.org/abs/1512.01224).
DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Thursday 17 December 2015 at 14.15 in A315
Martin Krššák (Sao Paulo)
Teleparallel gravity and the role of inertia in theories of gravity
Abstract: The central role in general relativity is played by the principle of equivalence, which suggests that gravity and inertia are locally indistinguishable, and it is hardcoded into general relativity through the use of the Levi-Civita geometry. In this talk, I will present an interesting work-around to this problem known as teleparallel gravity. It can be understood as a dual theory to general relativity, where gravity is attributed to torsion of spacetime, rather than curvature. As it turns out, in this theory it is possible to separate (non-locally) the problematic inertial contributions from gravity, and define the finite, purely gravitational, action. I will show that this subtraction of the inertial effects closely resembles holographic renormalization, and discuss its applications in holography and modified gravity.
Friday 18 December 2015 at 10.15 in A315
Ville Keränen (Oxford, Note day!)
Thermalization in the AdS/CFT duality
Abstract: We study examples of out of equilibrium systems in the context of the AdS/CFT duality. We attempt to draw general conclusions from these studies and in particular will highlight the role of black hole quasinormal frequencies in determining the rate at which these systems approach thermal equilibrium.
Update your information in Tuhat
————————————
Permanently employed teaching and research staff are requested to update their information in the Tuhat database by 11 January 2016.
https://flamma.helsinki.fi/en/notifications/update-your-information-in-tuhat
Fortcoming training for employees: Finnish for international personnel
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Finnish for Beginners 2 (20 t/1 op)
Sign up in http://www.helsinki.fi/trainingcalendar ( Staff Training Calendar HENKKA)
Academic year 2016-2017: THE OSK. HUTTUNEN FOUNDATION
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The Osk. Huttunen Foundation offers grants to young Finns for the completion of doctoral studies and for postdoctoral research work at universities outside Finland.
Dead-line for applications 15.1.2016.
Further information: http://www.oskhuttusensaatio.net/english.html
Visitors
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M. Krssak 16.12. – 18.12. (AV)
HIP NEWS December 7th 2015
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COSMO-Seminar
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Wednesday 9 December 2015 at 14:15 in A315
Christian Spethmann (NICPB, Tallinn)
Dark Plasma and Dark Atoms
Abstract: Atom-like structures in the dark matter sector are generally believed to be only possible if the dark sector is asymmetric, in analogy with baryon number in the visible sector. In this talk we discuss how, given the right particle content and couplings, it might be possible to generate dark atoms thermally, i.e. without an asymmetry. Besides being an interesting proof of concept, such models might be relevant to explain non-gravitational interactions of dark matter and can lead to new phenomena like dark plasma interactions.
DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Thursday 10 December 2015 at 14.15 in E206 (note place!)
David Milstead (Stockholm)
A new high precision search for neutron-antineutron oscillations at the ESS
Abstract: In this talk I shall discuss how a search for neutron-antineutron oscillations can be carried out at the European Spallation Source. It will be shown how such oscillations can provide a unique probe of some of the central questions in particle physics and cosmology: the energy scale and mechanism for baryon number violation, the origin of the baryon-antibaryon asymmetry of the universe, and the mechanism for neutrino mass generation. An overview of the proposed experiment and its capability to a sensitivity to the oscillation probability, which is three orders of magnitude greater than previously obtained, will be given. The international collaboration which has been formed to carry out the proposed work will also be described.
Fulbright-Technology Industries of Finland Grant
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More information about Fulbright-Technology Industries of Finland Grants (in Finnish): www.fulbright.fi/fi/stipendit-tohtorintutkinnon-jalkeiseen-tutkimukseen-ja-luennointiin/fulbright-technology-industries.
Application deadline is December 14, 2015, 10:00 a.m.
Update your information in Tuhat
————————————————–
Permanently employed teaching and research staff are requested to update their information in the Tuhat database by 11 January 2016.
https://flamma.helsinki.fi/en/notifications/update-your-information-in-tuhat
Visitors
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M. Krssak 16.12. – 18.12. (AV)
HIP NEWS November 30th 2015
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 1 December 2015 at 10.15 in A315
Heribert Weigert (Cape Town)
QCD at small high energies: Wilson line correlators in the Color Glass Condensate and beyond
Abstract: Modern collider experiments use ever higher energies for many reasons, be it to study the QCD phase transition, to study the newest confirmed addition to the Standard Model or to search for physics beyond the standard model. In all of his QCD plays a central role, be it the immediate area of study (as with the quark gluon plasma) or as the main limiting factor on precision (as with standard model particle physics). Over the last decade it has been established that at small x the machinery and phenomenology of the Color Glass Condensate provide powerful tools to study the energy dependence of cross sections for a wide range of observables. Its evolution equation, the JIMWLK equation has a structural analogue in jet evolution equations (the BMS equation and its finite Nc generalizations) with a conformal map establishing the connection. The key ingredient that drives cross sections in all these cases are Wilson line correlators which also appear in GPDs and in energy loss calculations aiming at studying the QCD as a medium. This is clearly too big a canvas to fill with paint completely with one talk, instead, I will content myself with the first steps needed to expose these connections, starting from JIMWLK and the CGC, and show some ideas of how to study and analyze the underlying structures.
COSMO-Seminar
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Thursday 3 December 2015 at 14:15 in A315 (Note the date!)
Kwan Chuen Chan (ICE Barcelona)
Halo clustering in Lagrangian space
Abstract: Although we observe halos (or galaxies) in Eulerian space, modeling of halo clustering often starts with halos in the Lagrangian space. We construct Lagrangian halos by tracing the particles in Eulerian halos back to Lagrangian space in N-body simulations to study their properties. The window function for Lagrangian halos always appears in the theoretical modelling of the Lagrangian halos. Although the window is often assumed to be a top-hat, we find that it is more smooth than a top-hat, but less diffuse than a Gaussian. Using this effective window function together with the scale-dependent excursion set bias parameters we are able to fit the Lagrangian cross bias parameter in Fourier space well up to k R_{Lag} ~ 10, where R_{Lag} is the Lagrangian size of the halo. Furthermore we check the so-called Lagrangian bias consistency relations. These powerful relations not only enable us to check the self-consistency of the biasing prescription, it can also allow us to extract the halo formation physics.
Fulbright-Technology Industries of Finland Grant
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More information about Fulbright-Technology Industries of Finland Grants (in Finnish): www.fulbright.fi/fi/stipendit-tohtorintutkinnon-jalkeiseen-tutkimukseen-ja-luennointiin/fulbright-technology-industries.
Application deadline is December 14, 2015, 10:00 a.m.
Update your information in Tuhat
————————————
Permanently employed teaching and research staff are requested to update their information in the Tuhat database by 11 January 2016. https://flamma.helsinki.fi/en/notifications/update-your-information-in-tuhat
The Strategic Research Council (SRC) at the Academy of Finland : Apply for strategic research funding
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The SRC’s call will be implemented in two stages. The first stage, for letters of intent, will be open in the Academy of Finland’s online services between 5 November and 9 December 2015.
In addition, the SRC will open a supplementary call within the 2015 programme A Climate-Neutral and Resource-Scarce Finland. https://flamma.helsinki.fi/en/notifications/apply-for-strategic-research-funding
Visitors
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K.C. Chan 29.11. – 6.12. (FM)
H. Weigert 23.11 – 5.12. (KR)
J. Zeilinger 20.11 – 5.12. (KR)
HIP NEWS November 23rd 2015
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 24 November 2015 at 10.15 in A315
Jacopo Ghiglieri (Bern)
Gravitational wave background from Standard Model physics
Abstract: Any plasma in thermal equilibrium emits gravitational waves, caused by physical processes such as macroscopic hydrodynamic fluctuations and microscopic particle collisions. We will show that, for the largest wavelengths, the emission rate is due to the former process and is proportional to the shear viscosity of the plasma. In the Standard Model at T > 160 GeV, the shear viscosity is dominated by the most weakly interacting particles, right-handed leptons, and is relatively large. We estimate the order of magnitude of the corresponding spectrum of gravitational waves. At smaller wavelengths the leading contribution is given by particle collisions, which we also estimate at leading logarithmic order. Even though at small frequencies (corresponding to the sub-Hz range relevant for planned observatories such as eLISA) this SM background is tiny compared with that from non-equilibrium sources, we conclude that the total energy carried by the high-frequency part of the spectrum is non-negligible if the production continues for a long time. Finally, we suggest that this may constrain (weakly) the highest temperature of the radiation epoch. Observing the high-frequency part directly sets a very ambitious goal for future generations of GHz-range detectors.
COSMO-Seminar
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Wednesday 25 November 2015 at 14:15 in D101
Hannu Kurki-Suonio and Syksy Räsänen (Helsinki)
Yleinen suhteellisuusteoria sata vuotta (In Finnish!)
COSMO-Seminar
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Thursday 26 November 2015 at 14:15 in D114 (Note the date and place!)
Bruce Bassett (Cape Town University)
Rise of the Machines – will artificial intelligence ever do research?
Abstract: The LSST and the SKA will require us to process up to an exabyte of data per day. This presents unprecedented challenges and opportunities for a new generation of statistical inference and machine learning algorithms. In this talk we will discuss some of the issues, approaches and fundamental questions including the question of whether machines will ever do original research.
DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Thursday 26 November 2015 at 14.15 in E207 (note place!)
Albert de Roeck (CERN)
The Large Hadron Collider: The Present and the Future.
Fulbright-Technology Industries of Finland Grant
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More information about Fulbright-Technology Industries of Finland Grants (in Finnish): www.fulbright.fi/fi/stipendit-tohtorintutkinnon-jalkeiseen-tutkimukseen-ja-luennointiin/fulbright-technology-industries.
Application deadline is December 14, 2015, 10:00 a.m.
Update your information in Tuhat
————————————————–
Permanently employed teaching and research staff are requested to update their information in the Tuhat database by 11 January 2016. https://flamma.helsinki.fi/en/notifications/update-your-information-in-tuhat
The Strategic Research Council (SRC) at the Academy of Finland : Apply for strategic research funding
————————————————————————————————————-
The SRC’s call will be implemented in two stages. The first stage, for letters of intent, will be open in the Academy of Finland’s online services between 5 November and 9 December 2015.
In addition, the SRC will open a supplementary call within the 2015 programme A Climate-Neutral and Resource-Scarce Finland. https://flamma.helsinki.fi/en/notifications/apply-for-strategic-research-funding
Visitors
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B. Bassett 26.11. – 27.11. (ML)
M. Ball 24.11. – 27.11. (EB)
K.C. Chan 29.11. – 6.12. (FM)
P. Gasik 24.11. – 27.11. (EB)
J. Ghiglieri 23.11. – 27.11. (AV)
G. Itsios 16.11. – 23.11. (NJ)
V. Ratza 24.11. – 27.11. (EB)
H. Weigert 23.11 – 5.12. (KR)
J. Zeilinger 20.11 – 5.12. (KR)
HIP NEWS November 16th 2015
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 17 November 2015 at 10.15 in A315
Georgios Itsios (Santiago de Compostela)
Exploring cold holographic matter
Abstract: In this talk we discuss aspects of cold matter using holographic techniques. Our holographic description is realized through a top-down approach, in which we consider D-brane intersections of different dimensionalities. We will analyze several properties of these systems such as the speed of first sound, the diffusion constant and the speed of zero sound. We also discuss the specific case of the D3-D5 intersection with a non-zero flux across the internal part of its worldvolume.
COSMO-Seminar
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Wednesday 18 November at 14:15 in A315
Christian Gross (Helsinki)
Gauge fields as dark matter
Abstract: I discuss the scenario of a dark U(1) or SU(N) gauge group coupled to the Standard Model via the Higgs portal. It turns out that minimal CP-conserving hidden Higgs sectors entail stable massive gauge fields which fall into the WIMP category of dark matter candidates. For SU(N), N>2, DM consists of three components, two of which are degenerate in mass. In all of the cases, there are substantial regions of parameter space where the direct and indirect detection as well as relic abundance constraints are satisfied.
DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Thursday 19 November 2015 at 10.15 in A315
Joonas Nättilä (Tuorla, Turku)
Equation of state for the dense matter inside neutron stars using thermonuclear explosions
Abstract: In my talk I will describe how observations of thermonuclear explosions on top of neutron stars ends up constraining the size of these ultra-compact objects. I will also show how we can model these explosions and how the atmosphere of the star modifies the emerging spectrum. As it turns out, good understanding of the physics behind these powerful bursts is also crucial for accurate mass and radius measurements. From the size measurements we can then obtain a parametrized equation of state of the cold dense matter by using Bayesian methods. This allows us to set limits on some nuclear parameters and to constrain an empirical pressure-density relation for the dense neutron matter.
Fulbright-Technology Industries of Finland Grant
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More information about Fulbright-Technology Industries of Finland Grants (in Finnish): www.fulbright.fi/fi/stipendit-tohtorintutkinnon-jalkeiseen-tutkimukseen-ja-luennointiin/fulbright-technology-industries. Application deadline is December 14, 2015, 10:00 a.m.
Update your information in Tuhat
————————————————–
Permanently employed teaching and research staff are requested to update their information in the Tuhat database by 11 January 2016. https://flamma.helsinki.fi/en/notifications/update-your-information-in-tuhat
The Strategic Research Council (SRC) at the Academy of Finland : Apply for strategic research funding
———————————————————————————————————
The SRC’s call will be implemented in two stages. The first stage, for letters of intent, will be open in the Academy of Finland’s online services between 5 November and 9 December 2015.
In addition, the SRC will open a supplementary call within the 2015 programme A Climate-Neutral and Resource-Scarce Finland. https://flamma.helsinki.fi/en/notifications/apply-for-strategic-research-funding
Visitors
—————
K.C. Chan 29.11. – 6.12. (FM)
J. Ghiglieri 23.11. – 27.11. (AV)
G. Itsios 16.11. – 23.11. (NJ)
HIP NEWS November 9th 2015
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 10 November 2015 at 10.15 in A315
David Salek (Amsterdam)
Dark matter (and dark mediators) at the LHC
Abstract: The LHC results on dark matter from Run-1 were mostly interpreted in the framework of effective field theories. Simplified models involve new mediators between the Standard Model and the Dark Sector and allow for richer phenomenology and more complex interpretations. Possible dark matter search strategies at the LHC in Run-2 will be discussed.
COSMO-Seminar
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Wednesday 11 November at 14:15 in A315
Matti Heikinheimo (Helsinki)
Dark Matter Self-Interactions via Collisionless Shocks in Cluster Mergers
Abstract: While dark matter self-interactions may solve several problems with structure formation, so far only the effects of two-body scattering of dark matter particles have been considered. I will discuss a scenario where a subdominant component of dark matter is charged under an unbroken U(1) gauge group. In this case collective plasma effects need to be taken into account to understand the dynamics of the interacting DM. Plasma instabilities can lead to collisionless dark matter shocks in galaxy cluster mergers. I will discuss the observations made in the Abell 3827 and 520 clusters in this context.
COSMOLOGY COLLOQUIUM
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Time and place: Thursday 12 November at 14:15 in E204 (note place)
Speaker: Lawrence Krauss (Arizona State University)
Title: Journey to the Beginning of Time: Gravitational Waves, Inflation and Fundamental Physics
Abstract: Gravitational Waves from Inflation may have been discovered, or may soon be discovered. If they are, this will push our empirical handle on the universe back in time by 49 orders of magnitude, and will allow us to explore issues ranging from supersymmetry to grand unification, the quantum theory of gravity, and even the possible existence of other universes.
DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Thursday 12 November 2015 at 14.15 in E207 (note place)
Jaeyoung Park (Energy Matter Conversion Corporation, San Diego)
Polywell Fusion – Electric Fusion in a Magnetic Cusp
Abstract: Nuclear fusion power is considered the ultimate energy source because of its nearly inexhaustible supply of cheap fuels,
intrinsic safety, zero carbon emissions and lack of long-lived radioactive waste. In this talk, I will introduce the Polywell fusion concept that may offer a low cost and rapid development path to power the world economically and sustainably. As conceived by Dr. Robert Bussard at Energy Matter Conversion Corporation (EMC2) in 1985, the Polywell fusion concept combines electric fusion with magnetic cusp confinement. This allows the Polywell reactor to be small, stable, and highly efficient. Recently, EMC2 carried out an experiment that demonstrated dramatically improved high-energy electron confinement in a magnetic cusp system operating at beta (=plasma pressure/magnetic field pressure) near 1. This result has significant implications for cusp related schemes for producing controlled nuclear fusion power.
Fulbright-Technology Industries of Finland Grant
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More information about Fulbright-Technology Industries of Finland Grants (in Finnish): www.fulbright.fi/fi/stipendit-tohtorintutkinnon-jalkeiseen-tutkimukseen-ja-luennointiin/fulbright-technology-industries.
Application deadline is December 14, 2015, 10:00 a.m.
Update your information in Tuhat
————————————————–
Permanently employed teaching and research staff are requested to update their information in the Tuhat database by 11 January 2016.
https://flamma.helsinki.fi/en/notifications/update-your-information-in-tuhat
Fortcoming training for employees
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Prepare for your doctoral defence 20.11.2015 at 12:30-16:00
Those with dissertation in the near future.
Last sign-up date: 9.11.2015
Sign up in http://www.helsinki.fi/trainingcalendar ( Staff Training Calendar HENKKA)
The Strategic Research Council (SRC) at the Academy of Finland : Apply for strategic research funding
————————————————————————————————————-
The SRC’s call will be implemented in two stages. The first stage, for letters of intent, will be open in the Academy of Finland’s online services between 5 November and 9 December 2015.
In addition, the SRC will open a supplementary call within the 2015 programme A Climate-Neutral and Resource-Scarce Finland. https://flamma.helsinki.fi/en/notifications/apply-for-strategic-research-funding
Visitors
—————
K.C. Chan 29.11. – 6.12. (FM)
J. Ghiglieri 23.11. – 27.11. (AV)
G. Itsios 16.11. – 23.11. (NJ)
J. Park 12.11. – 13.11. (TL)
HIP NEWS November 2nd 2015
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HIP Staff News
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Dr. Jaakko Härkönen has been appointed by the Xiangtan University
(PR China) as a honorary professor for the period 2015-2017.
HIP Detector Laboratory informs
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20 doctoral students from Nordic countries will visit HIP Detector Laboratory for research training course in detector technology for particle physics during 2-6.11.2015.
DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 3 November 2015 at 10.15 in A315
Lene Bryngemark (Lund)
Search for physics beyong the Standard Model using dijet distributions in ATLAS
Abstract: The LHC gives us access to the highest collider energies, at the highest intensities, providing a unique opportunity to thoroughly examine the constituents of matter and their interactions at ever smaller distances and higher mass scales. Produced in the strong — or a new, previously unseen — interaction, jets probe the very energy frontier. With the recent increase in LHC beam energy, ATLAS makes use of this sensitivity to make its first statements of what physics looks like in a new energy regime. In this presentation I show the results from both the 8 and the more recent 13 TeV analysis of dijet mass and angular distributions.
COSMO-Seminar
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Wednesday 4 November at 14:15 in A315
Michael Joyce (UPMC, Paris)
Non-linear structure formation in scale free cosmological models
Abstract: Calculation of the clustering of matter in the universe in different cosmological models, even in the approximation that all but gravitational forces are neglected, relies essentially on numerical simulations which use the N body method. The physics of this non-linear clustering remains poorly understood, and there are also open questions about the resolution/precision of simulations. After a brief overview of these issues, I will discuss them in the framework of a particularly simple class of “scale-free” cosmological models, which have the interest of providing a very simple diagnostic for determining resolution, and also some simple analytical predictions for clustering. We explore using these models, in both one and three dimensions, two questions which turn out to be intimately linked to the issue of numerical resolution: the relevance of the stable clustering approximation in the strongly non-linear regime, and the dependence of halo profiles on cosmology and initial conditions.
DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Thursday 5 November 2015 at 10.15 in A315
David Daverio (Geneva)
Large scale structure formation within a general relativistic framework
Abstract: One century after the conception of General Relativity (GR), there is still a large pool of predictions we still have difficulties to get. Indeed, to give only one example, large scale structure formation is still simulated within a Newtonian framework. This framework, even well suited for cosmology as it can be understood as a week field quasi static approximation of GR, does not take into account the propagating degree of freedom of GR and is not well suited to include relativistic sources such as neutrinos. Recently, the first code aiming to simulate large scale structure within a general relativistic framework has been developed. This code, gevolution, solves GR in the weak field limit using the approximation scheme proposed in Adamek et al. 2014 and is constructed on top of the framework LATfield2 which manages the particles and provides a scalable parallelisation allowing to run with lattice of 4096^3 cells with one particle per cell on 16k processes. In this talk we will discuss the method used to develop this code and first results of cold dark matter simulation will be presented.
Visitors
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D. Daverio 25.10. – 6.11. (KR)
M. Joyce 3.11. – 5.11. (ML)
HIP NEWS October 26th 2015
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 27 October 2015 at 10.15 in A315
Alexander Merle (MPI, Munich)
Sterile Neutrino Dark Matter: From Particle to Astrophysics and back
Abstract: In the absence of a clear WIMP signal, we should think about alternative candidates for Dark Matter. A very well motivated example is a (up to now hypothetical) sterile neutrino with a mass of a few keV. In this talk, I will give an overview over the topic of keV sterile neutrino Dark Matter, thereby exploring all corners from Dark Matter production in the early Universe over astrophysical bounds and neutrino phenomenology to particle physics model building aspects. While WIMPs are not dead yet, they have to learn how to live in the neighbourhood of serious competitors.
COSMO-Seminar
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Wednesday 28 October 2015 at 14:15 in A315
Tommi Tenkanen (Helsinki)
Cosmic Inflation and Dark Matter
Abstract: We show that dark matter abundance and inflationary scale could be intimately related. Standard Model extensions with Higgs mediated couplings to new physics typically contain extra scalars whose excursions at the end of inflation can be very large. If their coupling to the Standard Model is weak, they will not thermalize and may easily constitute too much dark matter. As an example we consider Standard Model extended by a real singlet scalar and a singlet fermion. We discuss the field dynamics during inflation together with the post-inflationary dark matter production mechanisms and derive stringent constraints on viable mass scales and coupling values.
H2020 Marie Sklodowska-Curie ITN info session for the 2016 call applicants
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Time: 29.10.2015 at 13-15
https://flamma.helsinki.fi/en/researchers/infosession-msca-itn-2016-call-applicants
Registration: https://elomake.helsinki.fi/lomakkeet/64310/lomake.html
Further information on MSCA is available on https://flamma.helsinki.fi/en/EUframeworkprogrammes/HY309934
Particle Physics Day 2015
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Friday 30 October 2015 at 10:15 – 15:00 in Exactum CK112
http://www.helsinki.fi/~hitu_www/hituday_2015.html
Fortcoming training for employees
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Finnish Working Culture 6.11.2015 at 9:00 – 16:00
The course is targeted for all new international employees of the University of Helsinki.
Last sign-up date: 26.10.2015
Sign up in http://www.helsinki.fi/trainingcalendar ( Staff Training Calendar HENKKA)
Visitors
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A. Cabo 2.10. – 27.10. (AT)
D. Daverio 25.10. – 6.11. (KR)
A. Merle 26.10. – 28.10. (TT)
Y. Zhu 28.10. – 30.10. (AV)
HIP NEWS October 19th 2015
==============================
HIP Staff News
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Dr. Mikko Voutilainen has been appointed
as assistant professor (tenure-track)
in experimental particle physics at
the University of Helsinki starting
Nov. 1st, 2015.
DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 20 October 2015 at 10.15 in A315
Timo Alho (Reykjavik)
Geometric Algebra: a coordinate free formalism for inner product spaces
Abstract: Geometric Algebra (GA) is a mathematical system defined by
imbuing the vectors of an inner product space directly with the
Clifford algebra generated by the inner product, without considering a
separate representation of the algebra operating on the vectors. This
simple change in point of view gives a system which generalizes
exterior algebra, quaternions, spinors, and many other algebras used in
theoretical physics, while simplifying both concepts and calculations.
This talk will open a brief course on the algebra and its extension to
geometric calculus. During the talk we will primarily give elementary
details of the formalism, with more advanced topics to be handled later
during the course. Some applications are pointed out for motivation.
COSMO-Seminar
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Wednesday 21 October 2015 at 14:15 in A315
Hannu Nyrhinen (Helsinki)
Story of bimetric variational formalism
Abstract: Bimetric variational formalism was introduced a while ago to construct
novel bimetric gravity models. In these models an affine connection is generated
by an additional tensor field which is independent of the physical metric.
In this talk I will describe the ideas behind the bimetric variational formalism
and some results preceding our work (in JCAP05(2015)021). Namely, we addressed
the issue of ghosts plaguing many bimetric models. Previous work had hinted of a
possibility of removing such unstable degrees of freedom from these theories.
I will show how using the ADM decomposition it is possible to study these models
and the behaviour of their degrees of freedom.
H2020 Marie Sklodowska-Curie ITN info session for the 2016 call applicants
——————————————————————————–
Time: 29.10.2015 at 13-15
https://flamma.helsinki.fi/en/researchers/infosession-msca-itn-2016-call-applicants
Registration: https://elomake.helsinki.fi/lomakkeet/64310/lomake.html
Further information on MSCA is available on
[1]https://flamma.helsinki.fi/en/EUframeworkprogrammes/HY309934
Visitors
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A. Cabo 2.10. – 27.10. (AT)