Department of Applied Physics

Quantum Computing and Devices (QCD)

The Quantum Computing and Devices (QCD) group was formally established in October 2007, and since 2012, the premises of our research group has been referred to as QCD Labs. We keep an open mind and explore the most interesting and promising pathways to reach maximal quality and productivity in our research and innovations.

We have a major effort on experimental quantum physics with superconducting circuits, but we also carry out computational and theoretical work down to fundamental quantum mechanics. Currently, we focus on control and readout techniques for superconducting qubits and on the implementation of on-demand dissipation in quantum circuits to study the related dynamics of open quantum systems. We also develop ultrasensitive microwave detectors and on-chip components for controlling microwave photons, single-electron pumps based on silicon quantum dots, and quantum knots and monopoles in Bose-Einstein condensates. We are also proud to have given birth to a leading European quantum-computer company IQM.

We are looking for postdocs and PhD students for experiments on superconducting quantum electronic circuits

Requirements for postdocs:
Successful experience on measurements or fabrication of high-coherence superconducting resonators or qubits

Requirements for Ph.D students:
Outstanding performance in BSc and MSc studies on an applicable field (GPA 4.5/5.0 or greater)

If you fulfill the requirements, please apply by sending your CV, list of publications, and a short cover letter expressing your interests and greatest merits to Mikko ([email protected])

Mikko Möttönen

Group leader

Dr. Mikko Möttönen

Mikko's Quantum Blog

Research

Research highlight: 

NATURE PUBLICATION: Bolometer operating at the threshold for circuit quantum electrodynamics,
Nature 586, 47–51 (2020).

SCIENCE PUBLICATION: Observation of isolated monopoles in a quantum field,
Science 348, 544 (2015).

Bolometers used for qubit readout

Ultrasensitive bolometers

We develop fast and sensitive thermal detectors for circuit quantum electrodynamics applications.

Department of Applied Physics
Artistic depiction of a bright light in space / made by Ray Scipak

Quantum gases

Bose-Einstein condensation (BEC) is a manifestation of macroscopic occupation of a single quantum state.

Department of Applied Physics
Six superconducting qubits sample

Superconducting quantum electronics

We develop components and methodology in the rapidly growing field of quantum computing, especially in the framework of circuit quantum electrodynamics (cQED).

Department of Applied Physics
Quantum theory

Quantum theory

QCD's activities cover theoretical and computational problems in quantum information science as well as experimental realizations of quantum devices.

Department of Applied Physics
Silicon quantum electronics

Silicon quantum electronics

Our rigorous long term goal is to find a high-yield (100 pA) and metrologically accurate (10 ppb uncertainty) current source which could be used to redefine the unit of electric current, the ampere.

Department of Applied Physics

QCD Media Room

Media hits and research videos by the QCD group

QCD Cinema

Research presentations and media interviews on the research by the QCD group

QCD Media

QCD research in the media

Facilities

The samples are fabricated in Micronova cleanroom facilities.

Computational studies are performed utilizing the resources of Aalto University and CSC.

Micro and nanofabrication facilities

OtaNano offers facilities to develop innovative enabling technologies and apply them to practical micro- and nano-systems

Services
Cryostats and measurement equipment in QCD Labs

QCD Labs - Cryostats and measurement equipment

Cryostats and measurement equipment used in QCD Labs.

Department of Applied Physics

Latest publications

Correlation-Picture Approach to Open-Quantum-System Dynamics

S. Alipour, A. T. Rezakhani, A. P. Babu, K. Mølmer, M. Möttönen, T. Ala-Nissila 2020 Physical Review X

Dual-gated mono-bilayer graphene junction

Mingde Du, Luojun Du, Nan Wei, Wei Liu, Xueyin Bai, Zhipei Sun 2020 Nanoscale Advances

Realisation of a quantum current standard at liquid helium temperature with sub-ppm reproducibility

Stephen Giblin, Emma Mykkanen, Antti Kemppinen, Pekka Immonen, Antti Manninen, Mate Jenei, Mikko Mottonen, Gento Yamahata, Akira Fujiwara, Masaya Kataoka 2020 Metrologia

Tunable refrigerator for nonlinear quantum electric circuits

Hao Hsu, Matti Silveri, Andras Gunyho, Jan Goetz, Gianluigi Catelani, Mikko Mottonen 2020 Physical Review B

Bolometer operating at the threshold for circuit quantum electrodynamics

Roope Kokkoniemi, Jean-Philippe Girard, Dibyendu Hazra, Antti Laitinen, Joonas Govenius, Russell Lake, Iiro Sallinen, Visa Vesterinen, Matti Partanen, J. Y. Tan, K.W. Chan, Kuan Tan, Pertti J. Hakonen, Mikko Möttönen 2020 Nature

A category theoretical interpretation of discretization in Galerkin finite element method

Valtteri Lahtinen, Antti Stenvall 2020 MATHEMATISCHE ZEITSCHRIFT

Coherent spin control of s-, p-, d- and f-electrons in a silicon quantum dot

Ross Leon, Chih Heng Yang, Jason Hwang, Julien Camirand Lemyre, Tuomo Tanttu, Wister Huang, Kok Wai Chan, Kuan Tan, Fay Hudson, Kohei Itoh, Andrea Morello, Arne Laucht, Michel Pioro-Ladriere, Andre Saraiva, Andrew S. Dzurak 2020 Nature Communications

Comparison of Strain Effect between Aluminum and Palladium Gated MOS Quantum Dot Systems

Brian Chi Ho Mooy, Kuan Tan, Nai-Shyan Lai 2020 Universe
More information on our research in the Research database.
Research database
QCD Group members 2020

QCD members in the group photo 2020: Andras Gunyho, Aarne Keränen, Kassius Kohvakka, Roope Kokkoniemi, Suman Kundu, Sasu Tuohino, Aleksi Kononen, Heidi Kivijärvi, Jean-Philippe Girard, Jani Suolinna, Niko Savola, Wei Liu, Chengyu Yan, Antti Kirjasilta, Tuomas Mylläri, Timm Mörstedt, Valtteri Lahtinen, Frederik Ihmuotila, Aashish Sah, Arto Viitanen, Jinli Zhang, Jian Ma, Mikko Möttönen and Giacomo Catto.

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