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. Recently, we jointly developed with IQM an open-source software, KQCircuits, to design superconducting quantum processors, making our tools available for the entire quantum community (more information here).

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

Dual-gated mono-bilayer graphene junctions

Mingde Du, Luojun Du, Nan Wei, Wei Liu, Xueyin Bai, Zhipei Sun 2021 Nanoscale Advances

A robust method for image stitching

Matti Pellikka, Valtteri Lahtinen 2021 Pattern Analysis and Applications

Intrinsic decoherence and recurrences in a large ferromagnetic f = 1 spinor bose–einstein condensate

Juan Carlos Sandoval-Santana, Roberto Zamora-Zamora, Rosario Paredes, Victor Romero-Rochín 2021 SYMMETRY

Pauli Blockade in Silicon Quantum Dots with Spin-Orbit Control

Amanda E. Seedhouse, Tuomo Tanttu, Ross C. C. Leon, Ruichen Zhao, Kuan Yen Tan, Bas Hensen, Fay E. Hudson, Kohei M. Itoh, Jun Yoneda, Chih Hwan Yang, Andrea Morello, Arne Laucht, Susan N. Coppersmith, Andre Saraiva, Andrew S. Dzurak 2021 PRX Quantum

Many-body Majorana-like zero modes without gauge symmetry breaking

V. Vadimov, T. Hyart, J. L. Lado, M. Mottonen, T. Ala-Nissila 2021 PHYSICAL REVIEW RESEARCH

Validity of Born-Markov master equations for single- And two-qubit systems

Vasilii Vadimov, Jani Tuorila, Tuure Orell, Jürgen Stockburger, Tapio Ala-Nissila, Joachim Ankerhold, Mikko Möttönen 2021 Physical Review B

Photon-number-dependent effective Lamb shift

Arto Viitanen, Matti Silveri, Mate Jenei, Vasilii Sevriuk, Kuan Y. Tan, Matti Partanen, Jan Goetz, Leif Gronberg, Vasilii Vadimov, Valtteri Lahtinen, Mikko Mottonen 2021 PHYSICAL REVIEW RESEARCH

Inverse Faraday Effect for Superconducting Condensates

S. V. Mironov, A. S. Mel'Nikov, I. D. Tokman, V. Vadimov, B. Lounis, A. I. Buzdin 2021 Physical Review Letters

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

Broadband tunable phase shifter for microwaves

Jinli Zhang, Tianyi Li, Roope Kokkoniemi, Chengyu Yan, Wei Liu, Matti Partanen, Kuan Yen Tan, Ming He, Lu Ji, Leif Grönberg, Mikko Möttönen 2020 AIP ADVANCES
More information on our research in the Research database.
Research database
QCD members in the group photo 2021

QCD members in the group photo 2021: Aashish Sah, Timm Mörstedt, Toni Annala, Jian Ma, Aarne Keränen, Valtteri Lahtinen, Andras Gunyho, Wallace Santos Teixeira,  Florian Blanchet, Jean-Philippe Girard, Giacomo Catto, Vasilii Vadimov,  Arto Viitanen, Tuomas Uusnäkki, Suman Kundu, Roberto Zamora-Zamora,  Olavi Kiuru, Joonas Vuojamo, Heidi Kivijärvi and Mikko Möttönen.

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