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.
We are currently looking for Postdocs/PhD Students in the area of superconducting quantum circuits (details and application instructions) and Staff Scientist (details and application instructions).
SCIENCE PUBLICATION: Observation of isolated monopoles in a quantum field,
Science 348, 544 (2015).
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.
Fast control of dissipation in a superconducting resonator
Evidence for universality of tunable-barrier electron pumps
Photon blockade and the quantum-to-classical transition in the driven-dissipative Josephson pendulum coupled to a resonator
Broadband Lamb shift in an engineered quantum system
Calibration of cryogenic amplification chains using normal-metal-insulator-superconductor junctions
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
Accelerated stabilization of coherent photon states
QCD members in 2019. From left to right: Chengyu Yan, Akseli Mäkinen, Eero Väisänen, Kaapo Seppänen, Roberto Zamora-Zamora, Mikko Möttönen, Eemil Visakorpi, Tuomas Lebedeff, Aarne Keränen, Vasilii Sevriuk, Heidi Kivijärvi, Máté Janei, Otto Solatie, Wei Liu, Tuomas Ollikainen, Jinli Zhang, Roope Kokkoniemi, Kassius Kohvakka, Joni Ikonen, Arto Viitanen, Johannes Heinsoo and Jean-Philippe Girard.