Department of Applied Physics

Quantum Dynamics (QD)

The research interests of the QD group are quantum coherent dynamics and quantum many-body phenomena in designed nanosystems. We are active in the fields of ultracold quantum gases and nanoplasmonics, and we combine theory and experiment.
Plasmon BEC

Research

The goal of the Quantum Dynamics group is to find novel quantum phenomena that may occur in future designed nanosystems. We target generic concepts, but two areas where the possibilities of designing and tailoring the systems are particularly fascinating are our focus: ultracold quantum gases and plasmonic lattice systems. In the latter we combine experiment and theory, while in the former our research is theoretical. The phenomena we have been interested in include superfluidity, superconductivity, topological phases of matter, Bose-Einstein condensation, lasing, and strong coupling between light and matter in the nanoscale.

We have found that exotic forms of superfluidity, such as the co-existence of superconductivity and magnetization, are especially stable in lattice geometries. Also, we have discovered that superfluidity in a flat energy band is connected to the quantum metric and has a lower bound given by a topological invariant, the Chern number.

The Quantum Dynamics group has experimentally observed strong coupling between dye molecules and plasmonic light modes. Arrays of metal nanoparticles offer us great opportunities for designing the band structure and the modes of light. We have observed Bose-Einstein condensation in such a plasmonic lattice, and also dark-mode lasing.

We fabricate plasmonic lattices using nanolithography and measure their optical properties in our lab, which includes a femtosecond laser setup for studies of quantum dynamics.

In the theory work, we use both analytical approaches and advanced numerical methods, such as dynamical mean field theory.

You can find below some of our publications, however click here for a full list of our Latest Publications. You can also find below Media coverage which includes public-accessible descriptions of our work and Alumni showing where people from our group have proceeded.

Latest publications

Polarization dependent beaming properties of a plasmonic lattice laser

Benjamin O. Asamoah, Henri Partanen, Sughra Mohamed, Janne Heikkinen, Atri Halder, Matias Koivurova, Marek Nečada, Tero Set, Jari Turunen, Ari T. Friberg, Tommi K. Hakala 2021 New Journal of Physics

Possible insulator-pseudogap crossover in the attractive Hubbard model on the Lieb lattice

Kukka-Emilia Huhtinen, Päivi Törmä 2021 Physical Review B

Vacuum-induced correlations in superconducting microwave cavity under multiple pump tones

T. Korkalainen, I. Lilja, M. R. Perelshtein, K. V. Petrovnin, G. S. Paraoanu, P. J. Hakonen 2021 MIPT (PHYSTECH) - QUANT 2020

Flat band induced non-Fermi liquid behavior of multicomponent fermions

Pramod Kumar, Sebastiano Peotta, Yosuke Takasu, Yoshiro Takahashi, Päivi Törmä 2021 Physical Review A

Interaction-induced topological superconductivity in antiferromagnet-superconductor junctions

Senna Luntama, Päivi Törmä, Jose Lado 2021 PHYSICAL REVIEW RESEARCH

Multiple-scattering T-matrix simulations for nanophotonics

Marek Nečada, Päivi Törmä 2021 COMMUNICATIONS IN COMPUTATIONAL PHYSICS

Flat-band transport and Josephson effect through a finite-size sawtooth lattice

Ville A.J. Pyykkönen, Sebastiano Peotta, Philipp Fabritius, Jeffrey Mohan, Tilman Esslinger, Päivi Törmä 2021 Physical Review B

Topology puts solitons in the corner

Grazia Salerno 2021 Nature Physics

Polarization and Phase Textures in Lattice Plasmon Condensates

Jani M. Taskinen, Pavel Kliuiev, Antti J. Moilanen, Päivi Törmä 2021 Nano Letters
More information on our research in the Research database.
Research database

Media coverage

Quantum dynamics group photo

Alumni

Degree

Name

Current position

PhD(2020) Marek Nečada

University of Eastern Finland

PhD(2020)

Aleksi Julku Aarhus University

PhD(2020)

Aaro Väkeväinen Microsoft HoloLens

PhD(2018)

Rui Guo

Ajat

PhD(2018)

Tuomas Vanhala

Ludwig Maximilian University of Munich

PhD(2018)

Heikki Rekola

University of Eastern Finland (Tampere University)

PhD(2017)

Anne-Maria Visuri

University of Geneva

PhD(2015)

Elmer Doggen

Karlsruhe Institute of Technology (CNRS, University of Toulouse)

PhD(2014)

Miikka Heikkinen

Accenture

PhD(2014)

Anna Korolyuk

Sanoma Oy

PhD(2013)

Antti-Pekka Eskelinen

Murata Electronics

PhD(2011)

Jussi Kajala

3DBear (Tekes, Spinverse)

PhD(2010)

Mikko Leskinen

Biit Oy

PhD(2009)

Marcus Rinkiö

Murata Electronics

PhD(2009)

Tommi Hakala

University of Eastern Finland (Aalto University, Harvard University)

PhD(2009)

Anton Kuzyk

Aalto University (Max Plank Institute for Intelligent Systems, Stuttgart; Technische Universität München)

PhD(2008)

Timo Koponen

Varian Medical Systems

PhD(2006)

Jami Kinnunen

Aalto University (JILA, Boulder)

PhD(2006)

Sampo Tuukkanen

Tampere University

PhD(2005)

Pasi Kivinen

Microsoft HoloLens (Murata Electronics)

PhD(2005)

Anu Huttunen

Nokia Research Center

PhD(2003)

Mirta Rodriguez

IRIS Research / Engineering / Technology (Instituto de Estructura de la Materia, Madrid; ICFO Barcelona; University of Oxford)

Postdoc

Konstantinos Daskalakis University of Turku
Postdoc Pramod Kumar

Aalto University

Postdoc

Long Liang

Nordita, Stockholm (Aalto University)

Postdoc

Marek Tylutki

Warsaw University of Technology

Postdoc

Jildou Baarsma

ASML Semiconductors

Postdoc

Arya Dhar

Visseiro (Leibniz University, Göethe-Universität Frankfurt)

Postdoc

Mikko Huttunen

Tampere University (University of Ottawa)

Postdoc

Stéphane Derom

Universite de Bourgogne

Postdoc

Shaoyu Yin

Zhejiang University of Technology (ZJUT) (University of Birmingham)

Postdoc

Lei Shi

Fudan University, China

Postdoc

Robert Moerland

Lumicks (TU Delft, The Netherlands)

Postdoc

Dong-Hee Kim

Gwangju Institute of Science and Technology (GIST), Korea

Postdoc

Alexander Itin

Universität Hamburg

Postdoc

Francesco Massel

University of Southeast Norway (University of Jyväskylä, University of Helsinki)

Postdoc

Andreas Johansson

University of Jyväskylä

Postdoc

Reza Bakhtiari

Universität Hamburg (Göethe-Universität Frankfurt)

Postdoc

Lars Melwyn Jensen

University of Copenhagen

Postdoc

Jani Martikainen

Aalto University (Nordic Institute for Theoretical Physics (NORDITA))

Postdoc

Vesa Ruuska

Postdoc

Jarmo Vanhanen

Lemi School

Senior researcher

Jussi Toppari

University of Jyväskylä

MSc(2018)

Miika Mäkelä

SSF - Space Systems Finland

MSc(2018)

Antti Ranni

Lund University

MSc(2013)

Juha Kreula

Boston Consulting (University of Oxford)

MSc(2012)

Joel Lehikoinen

Kaiku Health

MSc(2010)

Olli Nummi

Fortum Nuclear Services

MSc(2009)

Kimmo Laitinen

University of Eastern Finland

MSc(2008)

Ville Kotimäki

JAMK University of Applied Sciences

MSc(2007)

Joni Pasanen

University of Jyväskylä

MSc(2007)

Veikko Linko

Aalto University (Technische Universität München)

MSc(2007)

Marina Timmermans (Zavodchikova)

Imec, Belgium (Aalto University)

MSc(2006)

Heli Lehtivuori

University of Jyväskylä (Tampere University of Technology)

MSc(2006)

Lasse Hirviniemi

 

MSc(2005)

Tomi Paananen

Heinrich Heine University of Düsseldorf

MSc(2005)

Mikko Laitinen

University of Jyväskylä

MSc(2004)

Jukka Elfström

Moventas Wind

MSc(2003)

Esa Tarkiainen

Enermet

MSc(2002)

Arto Javanainen

University of Jyväskylä

MSc(2002)

Ossi Partanen

Nordic Semiconductor

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