My research group uses theoretical methods to investigate nanoscale solid state structures, such as very small semiconductor components. Much of our research can be classified as quantum science and quantum technology, meaning that we try to identify structures that have interesting quantum mechanical properties and think about ways to use these properties to make components or devices with new or improved functionality beyond what would be possible with classical physics. We work both with analytical and numerical methods, sometimes using large supercomputing facilities, and we often collaborate closely with different experimental groups.

Examples of current research topics:  

Superconductor-semiconductor hybrid structures

We investigate semiconductor nanostructures with superconductivity that is proximity-induced by coupling to a conventional superconductor. Such systems have many interesting properties, such as a dissipationless supercurrent that can be controlled with a gate voltage, strong spin-orbit coupling and subgap states that can be used to encode and manipulate quantum information. These activities are currently funded by grants from the European Research Council (ERC) and the Swedish Research Council (VR). 

Quantum transport and quantum thermodynamics

We study transport of quantities such as charge, spin, and heat in nanoscale systems connected to macroscopic leads. At present, we are particularly interested in fluctuations and noise in different types of energy conversion, such as nanoscale heat engines and refrigerators.

Hybrid electron-photon systems

We are interested in systems where electrons interact strongly with microwave photons, for example in quantum dots coupled to a superconducting microwave cavity. This research is funded by the Wallenberg Center for Quantum Technology (WACQT).