Research

We are interested in a wide variety of problems in theoretical physics, including string theory and quantum gravity, quantum field theory at strong coupling, holographic duality and its possible applications, and quantum information theory.

Recent publications (>2019):

Risking your NEC
Carlos Hoyos (Brookhaven and ICTEA, Oviedo), Niko Jokela (Brookhaven and Helsinki Inst. of Phys.), Jose Manuel Penín (Brookhaven and Helsinki Inst. of Phys. and U. Southampton (main)), Alfonso V. Ramallo (LIP, Coimbra and Santiago de Compostela U., IGFAE), Javier Tarrío (Brookhaven and Helsinki Inst. of Phys.)
e-Print: 2104.11749 [hep-th]

Quantum information probes of charge fractionalization
Brandon S. DiNunno (Texas U.), Niko Jokela (Helsinki U. and Helsinki Inst. of Phys.), Juan F. Pedraza (University Coll. London and Brandeis U.), Arttu Pönni (Aalto U.)
e-Print:2101.11636 [hep-th]
Accepted in JHEP

Memory effect in Yang-Mills theory with an axion
Niko Jokela (Helsinki Inst. of Phys.), K. Kajantie (Helsinki Inst. of Phys.), Miika Sarkkinen (Helsinki Inst. of Phys.)
e-Print:2012.14160 [hep-ph]

Probing the QCD Phase Diagram via Holographic Models
Jere Remes (Helsinki U.)

Gravitational waves from a holographic phase transition
Fëanor Reuben Ares (Sussex U., Astron. Ctr.), Mark Hindmarsh (Sussex U., Astron. Ctr.), Carlos Hoyos (Oviedo U.), Niko Jokela (Helsinki Inst. of Phys.)
e-Print:2011.12878 [hep-th]
Published in: JHEP

Is entanglement a probe of confinement?
Niko Jokela (Helsinki U. and Helsinki Inst. of Phys.), Javier G. Subils (ICC, Barcelona U.)
e-Print:2010.09392 [hep-th]
DOI:10.1007/JHEP02(2021)147
Published in: JHEP 02 (2021),147

Quantum hypothesis testing in many-body systems
Jan de Boer (Amsterdam U.), Victor Godet (Amsterdam U.), Jani Kastikainen (Helsinki U. and APC, Paris), Esko Keski-Vakkuri (Helsinki U. and Helsinki Inst. of Phys.)
e-Print:2007.11711 [quant-ph] (Submitted in SciPost Physics)

Towards precision holography
Niko Jokela (Helsinki Inst. of Phys. and Helsinki U.), Arttu Pönni (Aalto U.)
e-Print:2007.00010 [hep-th]
DOI: 10.1103/PhysRevD.103.026010
Published in: Phys.Rev.D 103 (2021) 2, 026010

Characterising heavy-tailed networks using q-generalised entropy and q-adjacency kernels
IT Koponen, E Palmgren, E Keski-Vakkuri
Physica A 566, 12566 (2021)

Conical defects and holography in topological AdS gravity
Jani Kastikainen (Helsinki U. and APC, Paris)
e-Print:2006.02803 [hep-th]
DOI:10.1088/1361-6382/abac44
Published in: Class.Quant.Grav. 37 (2020) 19,195010

Unified weak/strong coupling framework for nuclear matter and neutron stars
Niko Jokela (Helsinki U. and Helsinki Inst. of Phys.), Matti Jarvinen (Wise Observ.), Govert Nijs (Utrecht U. (main)), Jere Remes (Helsinki U. and Helsinki Inst. of Phys.)
e-Print: 2006.01141[hep-ph]
Published in: PRD

Transport in strongly coupled quark matter
Carlos Hoyos (Oviedo U. and ICTEA, Oviedo), Niko Jokela (Helsinki U. and Helsinki Inst. of Phys.), Matti Jarvinen (Tel Aviv U.), Javier G. Subils (Barcelona U. and ICC, Barcelona U.), Javier Tarrio (Helsinki U. and Helsinki Inst. of Phys.) et al.
e-Print:2005.14205 [hep-th]
DOI:10.1103/PhysRevLett.125.241601
Published in: Phys.Rev.Lett. 125 (2020),241601

Scattering length in holographic confining theories
Carlos Hoyos (Oviedo U. and ICTEA, Oviedo), Niko Jokela (Helsinki U.), Daniel Logares (Oviedo U. and ICTEA, Oviedo)
e-Print:2005.06904[hep-th]
DOI:10.1103/PhysRevD.102.086006
Published in:Phys.Rev.D 102 (2020) 8,086006

Quasinormal modes and thermalization in improved holographic QCD
Timo Alho (Helsinki Inst. of Phys.), Jere Remes (Helsinki Inst. of Phys.), Kimmo Tuominen (Helsinki Inst. of Phys.), Aleksi Vuorinen (Helsinki Inst. of Phys.)
e-Print:2002.09544 [hep-ph]
DOI:10.1103/PhysRevD.101.106025
Published in:Phys.Rev.D 101 (2020) 10,106025

Holographic spontaneous anisotropy
Carlos Hoyos (ICTEA, Oviedo), Niko Jokela (Helsinki U.), José Manuel Penín (Santiago de Compostela U., IGFAE and Southampton U.), Alfonso V. Ramallo (Santiago de Compostela U., IGFAE)
e-Print:2001.08218[hep-th]
DOI:10.1007/JHEP04(2020)062
Published in:JHEP 04 (2020),062

Scattering length from holographic duality
Carlos Hoyos (Oviedo U. and ICTEA, Oviedo), Niko Jokela (Helsinki U.), Daniel Logares (Oviedo U. and ICTEA, Oviedo)
e-Print:1910.13929[hep-th]
DOI:10.1103/PhysRevD.101.046028
Published in:Phys.Rev.D 101 (2020) 4,046028

Brane nucleation instabilities in non-AdS/non-CFT
Oscar Henriksson (Helsinki U.), Carlos Hoyos (Oviedo U. and ICTEA, Oviedo), Niko Jokela (Helsinki U.)
e-Print:1910.06348 [hep-th]
DOI:10.1007/JHEP02(2020)007
Published in: JHEP 02 (2020),007

Holographic fundamental matter in multilayered media
Ulf Gran (Goteborg, ITP), Niko Jokela (Helsinki U.), Daniele Musso (Santiago de Compostela U. and Santiago de Compostela U., IGFAE), Alfonso V. Ramallo (Santiago de Compostela U. and Santiago de Compostela U., IGFAE), Marcus Tornsö (Goteborg, ITP)
e-Print:1909.01864 [hep-th]
DOI:10.1007/JHEP12(2019)038
Published in:JHEP 12 (2019),038

Quasi-local energy and ADM mass in pure Lovelock gravity
Jani Kastikainen (U. Helsinki (main))
e-Print:1908.05522[gr-qc]
DOI:10.1088/1361-6382/ab5dfa
Published in:Class.Quant.Grav. 37 (2020) 2,025001

Novel color superconducting phases of $\cal{N}$ = 4 super Yang-Mills at strong coupling
Oscar Henriksson (Helsinki Inst. of Phys. and Helsinki U.), Carlos Hoyos (Oviedo U. and ICTEA, Oviedo), Niko Jokela (Helsinki U.)
e-Print:1907.01562[hep-th]
DOI: 10.1007/JHEP09(2019)088
Published in:JHEP 09 (2019),088

Finite-temperature Equations of State for Neutron Star Mergers
Paul M. Chesler (Harvard U.), Niko Jokela (Helsinki U. and Helsinki Inst. of Phys.), Abraham Loeb (Harvard U.), Aleksi Vuorinen (Helsinki U. and Helsinki Inst. of Phys.)
e-Print:1906.08440[astro-ph.HE]
DOI:10.1103/PhysRevD.100.066027
Published in:Phys.Rev.D 100 (2019) 6,066027

Notes on entanglement wedge cross sections
Niko Jokela (Helsinki U.), Arttu Pönni (Helsinki U.)
e-Print:1904.09582 [hep-th]
DOI:10.1007/JHEP07(2019)087
Published in:JHEP 07 (2019),087

Memory effect in Yang-Mills theory
Niko Jokela (Helsinki U.), K. Kajantie (Helsinki U.), Miika Sarkkinen (Helsinki U.)
e-Print:1903.10231[hep-th]
DOI:10.1103/PhysRevD.99.116003
Published in:Phys.Rev.D 99 (2019) 11,116003

Gravity dual of a multilayer system
Niko Jokela (Helsinki U.), José Manuel Penín (Santiago de Compostela U., IGFAE), Alfonso V. Ramallo (Santiago de Compostela U., IGFAE), Dimitrios Zoakos (Athens U.)
e-Print:1901.02020[hep-th]
DOI:10.1007/JHEP03(2019)064
Published in:JHEP 03 (2019),064