  Qubits based on quantum dots have excellent prospects for scalable quantum
technology due to their inherent compatibility with standard semiconductor
manufacturing. While early on it was recognized that holes may offer a
multitude of favourable properties for fast and scalable quantum control,
research thus far has remained almost exclusively restricted to the simpler
electron system. However, recent developments with holes have led to separate
demonstrations of single-shot readout and fast quantum logic, albeit only in
the multi-hole regime. Here, we establish a single-hole spin qubit in germanium
and demonstrate the integration of single-shot readout and quantum control.
Moreover, we make use of Pauli spin blockade, allowing to arbitrarily set the
qubit resonance frequency, while providing large readout windows. We deplete a
planar germanium double quantum dot to the last hole, confirmed by
radio-frequency reflectrometry charge sensing, and achieve single-shot spin
readout. To demonstrate the integration of the readout and qubit operation, we
show Rabi driving on both qubits and find remarkable electric control over
their resonance frequencies. Finally, we analyse the spin relaxation time,
which we find to exceed one millisecond, setting the benchmark for hole-based
spin qubits. The ability to coherently manipulate a single hole spin underpins
the quality of strained germanium and defines an excellent starting point for
the construction of novel quantum hardware.
