Bose-Einstein condensation (BEC) is a manifestation of macroscopic occupation of a single quantum state.
Quantum Computing and Devices (QCD)
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.
SCIENCE PUBLICATION: Observation of isolated monopoles in a quantum field,
Science 348, 544 (2015).
QCD's activities cover theoretical and computational problems in quantum information science as well as experimental realizations of quantum devices.
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.
Postdoctoral Researchers and Graduate Students
QCD is looking for Postdoctoral Researchers (fixed term) and Graduate Students in the area of experimental superconducting quantum devices. Send your application to Prof. Mikko Möttönen via email.
Qubit Measurement by Multichannel Driving
Creation of a Dirac monopole-antimonopole pair in a spin-1 Bose-Einstein condensate
Observation of microwave absorption and emission from incoherent electron tunneling through a normal-metal-insulator-superconductor junction
Flux-tunable heat sink for quantum electric circuits
Amorphous topological superconductivity in a Shiba glass
Accelerated stabilization of coherent photon states
Three-dimensional splitting dynamics of giant vortices in Bose-Einstein condensates
Parity-Engineered Light-Matter Interaction
Gigahertz Single-Electron Pumping Mediated by Parasitic States
Synthetic electromagnetic knot in a three-dimensional skyrmion
QCD members in 2018. From left to right: Roope Kokkoniemi, Mikael Myllymäki, Jesper Ilves, Dibyendu Hazra, Máté Jenei, Arnab Adhikary, Matti Partanen, Iiro Sallinen, Jan Goetz, Severi Rissanen, Vasilii Sevriuk, Mikko Möttönen, Aarne Keränen, Tuomas Ollikainen, Kassius Kohvakka, Márton András Gunyhó, Wei Liu.