Monthly Archives: March 2017

HIP NEWS March 27th 2017

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HIP NEWS March 27th 2017
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 28 March 2017 at 10.15 in A315
Brandon DiNunno (Austin)
Relaxation of non-local probes in AdS/CFT

Abstract: I will discuss the late-time evolution of non-local observables in an expanding, boost-invariant strongly coupled plasma via Holography. Focusing on first and second order dissipative Bjorken hydrodynamics, we compute the late-time behavior of two-point functions, Wilson loops and entanglement entropies analytically. We find universal formulae for the relaxation of such probes in conformal field theories with a gravity dual in the limit of infinite coupling. We then generalize our findings to finite coupling by studying Gauss-Bonnet gravity as well as alpha’ corrections.

COSMO-Seminar
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Wednesday 29 March 2017 at 14.15 in A315
Thomas Tram (ICG, Portsmouth)
Structure formation under the spell of General Relativity.

Abstract: Upcoming large scale structure surveys will map the structure of the Universe on very large scales where General Relativistic effects become important. In order to take full advantage of upcoming Large Scale Structure datasets, we must be able to make accurate theoretical predictions for all observational scales. This is well known on small scales where the precision of Newtonian N-body codes is constantly being pushed, but it is equally true at large scales. In this talk I will first present numerical and analytic computations of the matter bispectrum generated from Gaussian initial conditions at second order in perturbation theory, and I will then discuss a set of recently discovered methods for including GR effects and radiation in Newtonian N-body simulations.

CHECK OUT THE VIDEO CLIPS ON HIP YOUTUBE CHANNEL
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There are new video clips out on HIP Youtube channel:
https://www.youtube.com/channel/UCZXaM_Ny_1jVKWt7re-IHcg

Feel free to share, like and click them. Special thanks to the volunteers appearing on the video and to everyone who has contributed.

Visitors
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J. Chuba 4.4. – 7.4. (FM)
P. Dendooven 7.2. – 7.4.
B. DiNunno 26.3. – 1.4. (NJ, E K-V)
T. Tram 27.3. – 30.3. (FM)

HIP NEWS March 20th 2017

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HIP NEWS March 20th 2017
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 21 March 2017 at 10.15 in A315
Blagoje Oblak (ETH, Zürich)
BMS Particles in Three Dimensions

Abstract: In this talk I will sketch the relation between unitary representations of the BMS3 (Bondi-Metzner-Sachs) group and three-dimensional, asymptotically flat gravity. After defining BMS in 3D, I will argue that its unitary representations are classified by orbits of CFT (conformal field theory) stress tensors under conformal transformations. This will provide a natural relation between BMS particles and 3D quantum gravity. I will also show how one can compute BMS characters, which coincide with gravitational one-loop partition functions in thermal 3D flat space.

RESEARCHGUIDES: OPEN ACCESS POP UP
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More information Helsinki University Library http://libraryguides.helsinki.fi/oa/eng
Flamma https://flamma.helsinki.fi/en/HY362671

PHYSICS DAYS
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Physics Days 2017 – Fysiikan päivät 2017 will be held at the Aalto University Töölö Campus in Helsinki, March 22-24, 2017.
The event is jointly organized by the Finnish Physical Society and Aalto University.
More information in http://fp2017.physics.aalto.fi/

NEW BILATERAL FUNDING PROGRAM FOR SCIENTIFIC COOPERATION BETWEEN FRANCE AND FINLAND
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the Institut Français in Helsinki, the Embassy of France in Finland and the French Ministry of Education, Higher Education and Research have partnered with the Finnish Society for Science and Letters and the Finnish Academy for Science and Letters in Finland to launch a new seed funding program to initiate and strengthen bilateral cooperation in science, innovation and higher education in fields of excellence.
Application deadline: March, 31st 2017

More information and applications here: http://www.france.fi/uncategorized/events/science-and-universities/new-bilateral-funding-program-for-scientific-cooperation-between-france-and-finland/?lang=en

EXPERIENCING FINLAND EVENT
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Aalto University and University of Helsinki invite the newly arrived international staff and their family members to the next Experiencing Finland event. The event is an opportunity to get some practical hints about forthcoming spring and summer, Finnish people and Finland.
More information: https://flamma.helsinki.fi/fi/HY362037

VIDEO CLIPS – HIP AND CERN ROADSHOW IN FINLAND
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There are new video clips out on HIP Youtube channel:
https://www.youtube.com/channel/UCZXaM_Ny_1jVKWt7re-IHcg

Feel free to share, like and click them. Special thanks to the volunteers appearing on the video and to everyone who has contributed.

Visitors
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P. Dendooven 7.2. – 7.4.
B. Oblak 20.3. – 24.3. (NJ)
T. Tram 27.3. – 30.3. (FM)
Y. Zhu 21.3. – 25.3. (AV)

HIP NEWS March 13th 2017

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HIP NEWS March 13th 2017
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ACADEMY PROFESSOR MARKKU KULMALA NEW ACADEMICIAN OF SCIENCE
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Academy professor Markku Kulmala has been awarded the honorary title of Academician of Science. Among his numerous achievements and duties professor Kulmala leads the CLOUD project at HIP.

HIP congratulates professor Kulmala and two other new Academicians: Academy professor Eva-Mari Aro and professor emeritus Ilkka Niiniluoto.

http://www.aka.fi/en/about-us/media/press-releases/2017/title-of-academician-of-science-granted-to-eva-mari-aro-markku-kulmala-and-ilkka-niiniluoto/

DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 14 March 2017 at 10.15 in A315
Najmul Haque (Giessen)
Resummed QCD thermodynamics at finite temperature and chemical potential

Abstract: The thermodynamics of QCD at finite temperature and density is of great interest for the heavy ion collision experiments. In this talk I will discuss about the various thermodynamic quantities calculated within Hard thermal Loop approximation at finite temperature and finite chemical potential. I will also discuss about the possible extensions of the current results to make it more reliable in heavy-ion collision experiments.

COSMO-Seminar
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Wednesday 15 March 2017 at 14.15 in A315
Jose Beltrán (CPT Marseille)
Dusty inflation in Born-Infeldized gravity.

Abstract: In order to regularize the energy of point-like charged particles, Born and Infeld introduced a modification of the Maxwell Lagrangian that naturally imposes an upper bound on electromagnetic fields. Similar ideas can be applied to gravity to resolve the GR singularities. I will discuss a class of theories based on this scheme and present a scenario where inflation can be supported by a dust component within the context of these theories.

DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Thursday 16 March 2017 at 10.15 in A315
Risto Paatelainen (Jyväskylä)
Towards higher order accuracy in LCPT

Abstract: Hamiltonian perturbation theory in the light cone form (LCPT) has become a standard tool in understanding hadronic scattering processes within a first principles QCD approach. The calculational inconvenience of LCPT compared to standard covariant perturbation theory is balanced by several features that make its physical interpretation more transparent. Due to the more complicated mathematical structure resulting from the breaking of explicit rotational symmetry, LCPT has never been the formulation of choice for higher order loop calculations. More recently, however, calculations of small-x dilute-dense scattering processes in the Color Glass Condensate (CGC) picture have been approaching the NLO level, for example in the small-x evolution equation and inclusive deep inelastic scattering cross sections. In this talk I will discuss our latest work (T. Lappi, R. Paatelainen arXiv:1611.00497), in which we formulate the LCPT rules in helicity space, independently of the spinor representation. This presents a major technological improvement for loop calculations by replacing the Dirac algebra by simple helicity sums. I also demonstrate how to apply this framework to other LCPT calculations.

New bilateral funding program for scientific cooperation between France and Finland
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the Institut Français in Helsinki, the Embassy of France in Finland and the French Ministry of Education, Higher Education and Research have partnered with the Finnish Society for Science and Letters and the Finnish Academy for Science and Letters in Finland to launch a new seed funding program to initiate and strengthen bilateral cooperation in science, innovation and higher education in fields of excellence.
Application deadline: March, 31st 2017

More information and applications here: http://www.france.fi/uncategorized/events/science-and-universities/new-bilateral-funding-program-for-scientific-cooperation-between-france-and-finland/?lang=en

Experiencing Finland Event
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Aalto University and University of Helsinki invite the newly arrived international staff and their family members to the next Experiencing Finland event. The event is an opportunity to get some practical hints about forthcoming spring and summer, Finnish people and Finland.
More information: https://flamma.helsinki.fi/fi/HY362037

Visitors
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J. Beltran 14.3. – 16.3. (FM)
P. Dendooven 7.2. – 7.4.
N. Haquel 13.3. – 15.3. (AV)
B. Oblak 19.3. – 26.3. (NJ)
R. Paatelainen 15.3. – 17.3. (AV)
T. Tram 27.3. – 30.3. (FM)
Y. Zhu 21.3. – 25.3. (AV)

HIP NEWS March 6th 2017

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HIP NEWS March 6th 2017
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COSMO-Seminar
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Wednesday 8 March 2017 at 14.15 in A315
Tommi Tenkanen (Queen Mary U. London)
The many faces of the inflaton field.

Abstract: The minimal requirements for every inflationary model are that the inflaton field gives a long enough period of exponential expansion and subsequently reheats the universe, so that thermal equilibrium is attained prior to the Big Bang Nucleosynthesis. But could the inflaton be responsible for something else as well, namely the generation of dark matter or the electroweak phase transition? As a representative model example, we study these aspects in a scenario where the inflaton is a real singlet scalar. Requiring the model to describe inflation successfully, be compatible with the LHC data, and yield a) the correct dark matter abundance or b) a strong first order electroweak phase transition, we identify the regions of the parameter space where the model is viable.

New bilateral funding program for scientific cooperation between France and Finland
———————————————————————————————-
the Institut Français in Helsinki, the Embassy of France in Finland and the French Ministry of Education, Higher Education and Research have partnered with the Finnish Society for Science and Letters and the Finnish Academy for Science and Letters in Finland to launch a new seed funding program to initiate and strengthen bilateral cooperation in science, innovation and higher education in fields of excellence.

Application deadline: March, 31st 2017

More information and applications here: http://www.france.fi/uncategorized/events/science-and-universities/new-bilateral-funding-program-for-scientific-cooperation-between-france-and-finland/?lang=en

Researchers / Research funding / Tekes
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New knowledge and business from research ideas – call for research funding applications 1/2017

Through the “New knowledge and business from research ideas” application process, Tekes funds projects in which a project team is preparing to commercialise a research idea. Tekes funding will constitute 70% of the eligible costs.

Application period: Thu 15.12.2016 – Thu 09.03.2017

Online services https://www.tekes.fi/en/online-services/

More information https://www.tekes.fi/en/whats-going-on/application-schedules-2017/new-knowledge-and-business-from-research-ideas–call-for-research-funding-applications-12017/

The Maikki Friberg equality award: Suggest a candidate
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The Maikki Friberg Award is granted annually for notable work towards the promotion of equality at the University of Helsinki. All members of the University community may suggest a candidate. Communities and units may also propose themselves for the award.

Submit your suggestions by 10th March 2017.

Instructions can be found in flamma https://flamma.helsinki.fi/en/HY360853

Experiencing Finland Event
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Aalto University and University of Helsinki invite the newly arrived international staff and their family members to the next Experiencing Finland event. The event is an opportunity to get some practical hints about forthcoming spring and summer, Finnish people and Finland.
More information: https://flamma.helsinki.fi/fi/HY362037

Visitors
————
P. Dendooven 7.2. – 7.4.
N. Haquel 12.3. – 14.3. (AV)
B. Oblak 19.3. – 26.3. (NJ)
T. Tenkanen 3.3. – 10.3. (FM).
T. Tram 27.3. – 30.3. (FM)
Y. Zhu 21.3. – 25.3. (AV)