Theoretical Particle Physics and Cosmology at the Niels Bohr Institute Theoretical Particle Physics and Cosmology at the Niels Bohr Institute Theoretical Particle Physics and Cosmology at the Niels Bohr Institute Theoretical Particle Physics and Cosmology at the Niels Bohr Institute Theoretical Particle Physics and Cosmology at the Niels Bohr Institute

Theoretical high energy, astroparticle and gravitational physics

The Theoretical high energy, astroparticle and gravitational physics at the Niels Bohr Institute is involved in a wide scope of research activities centered around quantum theories of gauge fields, gravity and astrophysics.

Research areas include scattering amplitudes, effective field theory, black holes, holography, lattice simulations, quantum gravity, integrability, astroparticle physics, and cosmology.



















The Theoretical high energy, astroparticle and gravitational physics is a large section with a variety of research interests.

We have around 45 members, including permanent faculty, non-permanent faculty, postdocs and PhD students. In addition we have a number of affiliate professors and emeritus professors that contribute to the section as well. We work closely with the Niels Bohr International Academy (NBIA) and the Discovery Center for particle physics. 

We have two seminar series HET-seminar and HET-Discovery seminar with 1-2 seminar per week (see these events in the Calendar). In addition we have a seminar series in Astroparticle Physics. We have periodically one or more journal clubs. 

We are very focussed on teaching and supervision. We have our own 1-year study track that have attracted many Danish and international master students. Moreover, a large number of master students writes a thesis with us.



The Niels Bohr institute has many M.Sc. and PhD students. The students are closely attached to the research groups and supervisor, and have many social activities for International and Danish students.

If you are interested in studying Particle Physics and Cosmology, consider looking at these pages:

General information about the education, application, living in Denmark etc.







































The main themes of our research are:

Theoretical particle physics:

The theoretical framework of Particle physics is Quantum Field Theory, on which we have several experts. We explore exciting new theoretical techniques in computing scattering amplitudes that aim to revolutionize our understanding of Quantum Field Theory as a framework of particle physics, and possibly replace it with an entirely new formulation. Furthermore, we use these and other methods to study the phenomenology of particle physics for use in predictions for particle accelerators.

Gravity, gravitational waves and black holes:

Classical gravity (i.e. gravity without quantum effects included) is formulated successfully by Einsteins theory of General Relativity. This theory explains fascinating physical phenomena such as black holes and gravitational waves. We study the powerful new techniques to compute gravitational waves using methods developed for particle physics scattering amplitudes. This is important for future measurements of gravitational waves. We study extensions of General Relativity (e.g. in higher-dimensions, with cosmological constant, and to non-relativistic geometries) and correspondences between gravity and fluid physics. Furthermore, regarding black holes we study theoretical aspects of astrophysical phenomena such as jet-physics and black hole shadows.

Theoretical high-energy physics:

In theoretical high-energy physics we consider the most fundamental building blocks of nature. The central goal is to unify the theory of gravity, namely General Relativity, with the theory of particle physics, i.e. Quantum Field Theory. A highly successful modern approach to this is the Holographic Principle as formulated by the AdS/CFT correspondence. This correspondence is formulated in the framework of String Theory and M-theory. We have several experts in our section working on these topics and more. Among the fields of study are quantum gravity, the quantum nature of black holes, and integrable models.

Astroparticle physics:

Our research interests lie at the boundary between fundamental physics, astrophysics and cosmology. We focus on weakly interacting particles, such as the Neutrino, cosmic rays and gamma-rays. Those particles are abundantly produced in the most energetic astrophysical events, ranging from supernovas and neutron-star mergers to active galactic nuclei, as well as in the Early Universe. We aim at unveiling the nature of those particles, and at using them as probes of the inner working of a range of astrophysical sources and our Universe.  


Cosmology concerns the physics of the largest scales in our universe. This is closely tied to the origin of the universe and thereby also to particle and high-energy physics. In particular, we study the measurements of the Cosmic Microwave background which gives us a picture of how the universe looked shortly after its birth.



























































































































Pia Lykke Kohring

Troels Harmark

Pia Lykke Kohring
Section secretary
Phone: +45 353-25210

Troels Harmark
Section Leader, Associate professor

Phone: +45 23 29 89 04













Name Title Image
Search in Name Search in Title
Ambjørn, Jan Professor Emeritus Billede af Ambjørn, Jan
Andersen, Benjamin Halager PhD Fellow Billede af Andersen, Benjamin Halager
Armas, Jácome Saldanha N d O B External Billede af Armas, Jácome Saldanha N d O B
Bjerrum-Bohr, Emil Associate Professor - Promotion Programme Billede af Bjerrum-Bohr, Emil
Bourjaily, Jacob Lewis Associate Professor Billede af Bourjaily, Jacob Lewis
Bustamante, Mauricio Assistant Professor Billede af Bustamante, Mauricio
Cardoso, Vitor Professor Billede af Cardoso, Vitor
Carullo, Gregorio Postdoc Billede af Carullo, Gregorio
Chalabi, Adam Postdoc Billede af Chalabi, Adam
Chan, Juno PhD Fellow Billede af Chan, Juno
Chen, Gang Assistant Professor Billede af Chen, Gang
Chen, Yifan Postdoc Billede af Chen, Yifan
Christensen, Per Rex Associate Professor Emeritus Billede af Christensen, Per Rex
Christiansen, Marta Bloch Student Assistant Billede af Christiansen, Marta Bloch
Damgaard, Poul Henrik Professor Billede af Damgaard, Poul Henrik
De Amicis, Marina PhD Fellow Billede af De Amicis, Marina
Dyson, Conor PhD Student Billede af Dyson, Conor
Døssing, Thomas Associate Professor Emeritus Billede af Døssing, Thomas
Ester, Evelyn-Andreea PhD Fellow Billede af Ester, Evelyn-Andreea
Ezquiaga, Jose Maria Assistant Professor Billede af Ezquiaga, Jose Maria
Fiorillo, Damiano Francesco G Postdoc Billede af Fiorillo, Damiano Francesco G
Frellesvig, Hjalte Axel Postdoc Billede af Frellesvig, Hjalte Axel
Gressel, Oliver No job title Billede af Gressel, Oliver
Groth, Kathrine Mørch PhD Fellow Billede af Groth, Kathrine Mørch
Guarini, Ersilia PhD Fellow Billede af Guarini, Ersilia
Han, Shanzhong Enrolled PhD Student Billede af Han, Shanzhong
Hansen, Marie Cornelius PhD Fellow Billede af Hansen, Marie Cornelius
Harmark, Troels Associate Professor, Head of Section Billede af Harmark, Troels
Høst, Mette Visitor Billede af Høst, Mette
Jackson, Andrew D. Emeritus Billede af Jackson, Andrew D.
Kastha, Shilpa Postdoc Billede af Kastha, Shilpa
Katagiri, Takuya Postdoc Billede af Katagiri, Takuya
Kohring, Zofia Merie Section Secretary Billede af Kohring, Zofia Merie
Kozçaz, Can Guest Researcher Billede af Kozçaz, Can
Kristjansen, Charlotte Fløe Professor Billede af Kristjansen, Charlotte Fløe
Lassen, Petra Administrative Officer Billede af Lassen, Petra
Liu, Zhengwen Assistant Professor Billede af Liu, Zhengwen
Morales I Espasa, Roger PhD Fellow Billede af Morales I Espasa, Roger
Nasselski, Pavel Professor Billede af Nasselski, Pavel
Nielsen, Holger Frits Bech Emeritus Billede af Nielsen, Holger Frits Bech
Obers, Niels Anne Jacob Professor Billede af Obers, Niels Anne Jacob
Olesen, Poul Emeritus Billede af Olesen, Poul
Orselli, Marta No job title Billede af Orselli, Marta
Panosso Macedo, Rodrigo Postdoc Billede af Panosso Macedo, Rodrigo
Peretti, Enrico Postdoc Billede af Peretti, Enrico
Pereñiguez Rodriguez, David Postdoc Billede af Pereñiguez Rodriguez, David
Pethick, C. J. Emeritus Billede af Pethick, C. J.
Pica, Daniele Enrolled PhD Student Billede af Pica, Daniele
Pitik, Tetyana PhD Fellow Billede af Pitik, Tetyana
Placidi, Andrea No job title VIP Billede af Placidi, Andrea
Qian, Xin PhD Student Billede af Qian, Xin
Redondo Yuste, Jaime PhD Fellow Billede af Redondo Yuste, Jaime
Rudolph, Annika Lena Postdoc Billede af Rudolph, Annika Lena
Shalgar, Shashank Assistant Professor Billede af Shalgar, Shashank
Sieverding, Andre Postdoc Billede af Sieverding, Andre
Skowronek Santos, Marcos Student Assistant Billede af Skowronek Santos, Marcos
Spieksma, Thomas PhD Fellow Billede af Spieksma, Thomas
Spiering, Anne Postdoc Billede af Spiering, Anne
Su, Chenliang Enrolled PhD Student Billede af Su, Chenliang
Tamborra, Irene Professor Billede af Tamborra, Irene
Telalovic, Bernanda PhD Fellow Billede af Telalovic, Bernanda
Ulfbeck, Ole Carsten Associate Professor Emeritus Billede af Ulfbeck, Ole Carsten
Valera Baca, Victor Branco PhD Fellow Billede af Valera Baca, Victor Branco
Vergu, Cristian Assistant Professor Billede af Vergu, Cristian
Wilhelm, Matthias Associate Professor Billede af Wilhelm, Matthias
Zarembo, Konstantin Professor Billede af Zarembo, Konstantin
Zhang, Chi Postdoc Billede af Zhang, Chi
di Vecchia, Paolo Emeritus Billede af di Vecchia, Paolo
van de Meent, Maarten Assistant Professor Billede af van de Meent, Maarten
von Hippel, Matthew Hans Benjamin Assistant Professor Billede af von Hippel, Matthew Hans Benjamin

External staff & students

Navn Titel Telefon E-mail
Kim Splittorff Deputy head of department +45 24892498
Marta Orselli Affiliate associate professor    
Jácome Saldanha Armas    +45 35325200