HIP NEWS September 26th 2016
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DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 27 September 2016 at 10.15 in A315
Christian Ecker (TU Wien)
Exploring nonlocal observables in shock wave collisions

Abstract: We study the time evolution of 2-point functions and entanglement entropy in holographic shock wave collisions which are frequently used as toy models for heavy ion collisions. We discriminate between three classes of initial conditions corresponding to wide, intermediate and narrow shocks and show that they exhibit different phenomenology with respect to the nonlocal observables that we determine. Surprisingly, we found that 2-point functions can be sensitive to the inside of the black hole apparent horizon on the gravity side, while we did not find such cases for the entanglement entropy. This talk is based on arXiv:hep-th/1609.03676.

COSMO-seminar
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Wednesday 28 September 2016 at 14.15 in A315
Matteo Viel (OATS Trieste)
Cosmology with the Intergalactic Medium

Abstract: I will review the role of intergalactic matter between galaxies as a cosmological observable to address fundamental physical questions: nature of dark matter, masses of neutrinos and the cosmic cycle of baryons.

Finnish for international personnel, autumn 2016
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The AUTUMN 2016 course programme is available at helsinki.fi/finnishcourses
Registration form https://flamma.helsinki.fi/en/notifications/finnish-autumn16

Please check also http://www.helsinki.fi/trainingcalendar

Visitors
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F. Bezrukov 30.9. – 5.10. (FM)
M. Viel 26.9. – 29.9.2016 (FM)

HIP NEWS September 19th 2016
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Open positions / Post-doctoral positions at the Faculty of Science now open for applications; DL October 3rd, 2016
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The Faculty of Science is searching for up to ten post-doctoral fellows for 2+1 year contracts. The call for these positions is now open, deadline for the applications is October 3rd, 2016. Decisions on the positions will be made by January, 2017. The employment starts at the latest on October 1st, 2017, but this can be negotiated to be earlier.

More information can be found from the University’s recruitment portal, see https://www.helsinki.fi/en/open-positions/postdoctoral-positions-in-kumpula-science-campus

Due date: Monday, October 3, 2016

Announcement: Väisälä Foundation’s scholarships, deadline 26th September 2016
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Väisälä Foundation’s scholarships in natural sciences can be applied from 19th August to 26th September 2016.
Applications shall be made by electronic means only. For detailed instructions, see http://www.acadsci.fi/apurahat-ja-palkinnot/haettavat-apurahat/vaisalan-rahasto.html (in Finnish)

DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS
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Tuesday 20 September 2016 at 10.15 in A315
Tyler Gorda (Helsinki)
Global properties of rotating neutron stars with QCD equations of state

Abstract: This talk will discuss a numerical study of global properties of rotating neutron stars using the allowed band of QCD equations of state derived by Kurkela et al. (2014). This band is constrained by chiral effective theory at low densities and perturbative QCD at high densities, and is thus, in essence, a controlled constraint from first-principles physics. Previously, this band of equations of state was used to investigate non-rotating neutron stars only; now these results are extended to any rotation frequency below the mass-shedding limit. Mass-radius curves, allowed mass-frequency regions, radius-frequency curves for a typical 1.4-solar-mass star, and the values of the moment of inertia of the double pulsar PSR J0737-3039A are computed. I also present limits on observational data coming from these constraints, and identify values of observationally relevant parameters that would further constrain the allowed region for the QCD equation of state.

Finnish for international personnel, autumn 2016
——————————————————————-
The AUTUMN 2016 course programme is available at helsinki.fi/finnishcourses
Registration form https://flamma.helsinki.fi/en/notifications/finnish-autumn16

Please check also http://www.helsinki.fi/trainingcalendar

Visitors
————-
F. Bezrukov 30.9. – 5.10. (FM)
M. Viel 26.9. – 29.9.2016 (FM)

HIP NEWS September 12th 2016
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Open positions / Post-doctoral positions at the Faculty of Science now open for applications; DL October 3rd, 2016
——————————————————————————————————————
The Faculty of Science is searching for up to ten post-doctoral fellows for 2+1 year contracts. The call for these positions is now open, deadline for the applications is October 3rd, 2016. Decisions on the positions will be made by January, 2017. The employment starts at the latest on October 1st, 2017, but this can be negotiated to be earlier.

More information can be found from the University’s recruitment portal,
see https://www.helsinki.fi/en/open-positions/postdoctoral-positions-in-kumpula-science-campus

Due date: Monday, October 3, 2016

Announcement: Väisälä Foundation’s scholarships, deadline 26th September 2016
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Väisälä Foundation’s scholarships in natural sciences can be applied from 19th August to 26th September 2016.
How to apply: Applications shall be made by electronic means only scholarship applications online. The web service can access the call opens. For detailed instructions can be found on the site. http://www.acadsci.fi/en/scholarships-and-prizes/scholarships.html

COSMO -seminar
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Wednesday 14 September 2016 at 14:15 in A315
Alexey Golovnev (St. Petersburg State University)
Conformal and disformal relations in extended models of gravity

Abstract: Conformal and disformal relations between metrics are very important for modern scalar-tensor models. As a somewhat non-trivial example, the so-called mimetic gravity can be understood from the viewpoint of (non)invariance under disformal transformations. On the other hand, recently the concept of those relations was generalised to curvature-dependent (instead of scalar-dependent) transformations in disguise of C- and D-models. The latter might be nicely related to non-local gravity models. In my talk, I will review some of these topics.

COSMO –seminar
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Thursday 15 September 2016 at 14:15 in room A311 (note the unusual date and place!)
Henrik Nersisyan (ITP Heidelberg)
Non-local cosmology

Abstract: I will give a basic introduction to non-local modifications of General Relativity with special emphasis on the cosmological consequences of the mostly discussed $R\Box^{-2}R$ Maggiore, Mancarella (MM) model. The pathologies associated with non-local tensorial extensions will be also presented.

Events for International Staff – Fall 2016
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Sign up via e-lomake: https://elomake.helsinki.fi/lomakkeet/71668/lomake.html

Finnish for international personnel, autumn 2016
——————————————————————-
The AUTUMN 2016 course programme is available at helsinki.fi/finnishcourses
Registration form https://flamma.helsinki.fi/en/notifications/finnish-autumn16

Please check also http://www.helsinki.fi/trainingcalendar

Visitors
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A. Golovnev 12.9. – 16.9. (KE, FM)
T. Koivisto 12.9. – 16.9. (KR)
H. Nersisyan 10.9. – 17.9. (FM)

HIP NEWS September 5th 2016
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Announcement: Väisälä Foundation’s scholarships, deadline 26th September 2016
————————————————————————————-
Väisälä Foundation’s scholarships in natural sciences can be applied from 19th August to 26th September 2016.
How to apply: Applications shall be made by electronic means only scholarship applications online. The web service can access the call opens. For detailed instructions can be found on the site.
http://www.acadsci.fi/en/scholarships-and-prizes/scholarships.html

Finnish for international personnel, autumn 2016
——————————————————————-
The AUTUMN 2016 course programme is available at helsinki.fi/finnishcourses
Please check also http://www.helsinki.fi/trainingcalendar

Visitors
————-
M. Hindmarsh 22.8. – 5.9. (KR)