## Quantum gases

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

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.

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).

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

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.

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

Media hits and research videos by the QCD group

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

QCD research in the media

The samples are fabricated in Micronova cleanroom facilities.

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

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

Cryostats and measurement equipment used in QCD Labs.

QCD is looking for Postdoc/PhD students in the area of superconducting circuits. See application details and instructions.

QCD is looking for Staff Scientist. See application details and instructions.

Latest publications

Centre of Excellence in Quantum Technology, QTF, Quantum Computing and Devices, Department of Applied Physics

Publishing year: 2019
Applied Physics Letters

Centre of Excellence in Quantum Technology, QTF, Quantum Computing and Devices, Department of Applied Physics

Publishing year: 2019
Metrologia

Multiscale Statistical and Quantum Physics, Centre of Excellence in Quantum Technology, QTF, Department of Applied Physics, Quantum Computing and Devices, PICO - Quantum Phenomena and Devices, KVANTTI – Superconducting Qubits and Circuit QED

Publishing year: 2019
Physical Review A

Department of Applied Physics, Centre of Excellence in Quantum Technology, QTF, Quantum Computing and Devices, Aalto University

Publishing year: 2019
Nature Physics

Centre of Excellence in Quantum Technology, QTF, Quantum Computing and Devices, Department of Applied Physics

Publishing year: 2019
Applied Physics Letters

Publishing year: 2019
Physical Review Letters

Publishing year: 2019
Physical Review A

Department of Applied Physics, Quantum Computing and Devices, Centre of Excellence in Quantum Technology, QTF

Publishing year: 2018
Scientific Reports

Centre of Excellence in Quantum Technology, QTF, Quantum Computing and Devices, Department of Applied Physics, Multiscale Statistical and Quantum Physics

Publishing year: 2018
Scientific Reports

Research group members