Anisotropic exchange interaction of two hole-spin qubits.

Semiconductor spin qubits offer the potential to employ industrial transistor technology to produce large-scale quantum computers. Silicon hole spin qubits benefit from fast all-electrical qubit control and sweet spots to counteract charge and nuclear spin noise. However, the demonstration of a two-qubit interaction has remained an open challenge.

Cross-architecture tuning of silicon and SiGe-based quantum devices using machine learning.

The potential of Si and SiGe-based devices for the scaling of quantum circuits is tainted by device variability. Each device needs to be tuned to operation conditions and each device realisation requires a different tuning protocol. We demonstrate that it is possible to automate the tuning of a 4-gate Si FinFET, a 5-gate GeSi nanowire and a 7-gate Ge/SiGe heterostructure double quantum dot device from scratch with the same algorithm.

Assessment of Multiple Dimensions of Psychological Well-Being in Swiss Youth Born with a Unilateral Cleft Lip and Palate.

Objective: This study examines the psychological well-being of Swiss youths born with a unilateral cleft lip and palate (UCLP), in a multi-dimensional and clinical perspective.

Design: Retrospective cross-sectional study.

Setting: Self-report questionnaires completed by youths born with UCLP, followed at a specialized cleft clinic in Switzerland, and by peers without UCLP, recruited in schools of the Vaud county, Switzerland.

Phase-Driving Hole Spin Qubits.

The spin-orbit interaction in spin qubits enables spin-flip transitions, resulting in Rabi oscillations when an external microwave field is resonant with the qubit frequency. Here, we introduce an alternative driving mechanism mediated by the strong spin-orbit interactions in hole spin qubits, where a far-detuned oscillating field couples to the qubit phase. Phase-driving at radio frequencies, orders of magnitude slower than the microwave qubit frequency, induces highly nontrivial spin dynamics, violating the Rabi resonance condition.

Bullying in Swiss Youth Born with a Unilateral Cleft lip and Palate by Self- and Parent-Report.

Objective: This study aimed to gain a better understanding of bullying as victims and aggressors in youths born with unilateral cleft lip and palate (UCLP).

Design: This is an observational study comparing youths with UCLP (ages 8-16) and their parents with a control group (CG) of children in state schools and their parents.

Participants: Forty-one youths (43% female; mean age 12.