  Artificial Kitaev chains can be used to engineer Majorana bound states (MBSs)
in superconductor-semiconductor hybrids. In this work, we realize a two-site
Kitaev chain in a two-dimensional electrongas by coupling two quantum dots
through a region proximitized by a superconductor. We demonstrate systematic
control over inter-dot couplings through in-plane rotations of the magnetic
field and via electrostatic gating of the proximitized region. This allows us
to tune the system to sweet spots in parameter space, where robust correlated
zero bias conductance peaks are observed in tunnelling spectroscopy. To study
the extent of hybridization between localized MBSs, we probe the evolution of
the energy spectrum with magnetic field and estimate the Majorana polarization,
an important metric for Majorana-based qubits. The implementation of a Kitaev
chain on a scalable and flexible 2D platform provides a realistic path towards
more advanced experiments that require manipulation and readout of multiple
MBSs.
