Spin quantum computing

The possibility to access the quantum nature of matter at the mesoscopic level has opened a new era in condensed matter physics. Its success is based on the low dimensionality reached for the charge carriers, i.e., on the strong confinement of spatial dimensions to length scales comparable to the particle’s wavelength.

Quantum dots (QDs) are nanostructures hosted in semiconductors where a few electrons can be electrostatically trapped in discrete states. Therefore, QDs allow us to access and control the quantum nature of single electrons and interactions between them. Since the first measurements of few-electron phenomena in lateral gated QDs, the focus of applications of these systems has shifted from single spintronics toward quantum information science, as originally envisioned by Loss and DiVincenzo.

My main research interests in this field are the coupling between distant spin qubits and the control over negative influences of the environment with the goal of a scalable design of useful quantum devices based on this promising qubit platform.

Related Publications

Hole-spin qubits in Ge nanowire quantum dots: Interplay of orbital magnetic field, strain, and growth direction

Hole-spin qubits in Ge nanowire quantum dots: Interplay of orbital magnetic field, strain, and growth direction

Hole-spin qubits in quasi-one-dimensional structures are a promising platform for quantum information processing because of the strong spin-orbit interaction (SOI). We present analytical results and discuss device designs that optimize the SOI in Ge semiconductors.

Open positions

In September 2021 I am joining the Institute of Quantum Technologies of the German Aerospace Center (DLR) in Ulm, Germany, and I am inviting motivated scientists to join our group to work on Quantum information theory based on solid state spin qubits.We have two PhD positions and one postdoc position.
Squeezed hole spin qubits in Ge quantum dots with ultrafast gates at low power

Squeezed hole spin qubits in Ge quantum dots with ultrafast gates at low power

We propose a minimal design modification of Ge planar quantum dot devices that enhances the spin-orbit interaction by orders of magnitude and enables low power ultrafast hole-spin qubit operations.
Entangling nuclear spins in distant quantum dots via an electron bus

Entangling nuclear spins in distant quantum dots via an electron bus

We propose a protocol for the deterministic generation of entanglement between two ensembles of nuclear spins surrounding two distant quantum dots.

QSIT INSPIRE Postdoc Award

I was awarded the INSPIRE award for postdocs launched by the National Center of Competence in Research Quantum Science and Technology.