  Integrating precise, stable, ultra-low noise visible light lasers into atomic
systems is critical for advancing quantum information sciences and improving
scalability and portability. Trapped ions are a leading approach for
high-fidelity quantum computing, high-accuracy optical clocks, and precision
quantum sensors. However, current ion-based systems rely on bulky, lab-scale
precision lasers and optical stabilization cavities for optical clock and qubit
operations, constraining the size, weight, scalability, and portability of
atomic systems. Chip-scale integration of ultra-low noise lasers and reference
cavities operating directly at optical clock transitions and capable of qubit
and clock operations will represent a major transformation in atom and trapped
ion-based quantum technologies. However, this goal has remained elusive. Here
we report the first demonstration of chip-scale optical clock and qubit
operations on a trapped ion using a photonic integrated direct-drive visible
wavelength Brillouin laser stabilized to an integrated 3-meter coil-resonator
reference cavity and the optical clock transition of a $^{88}$Sr$^+$ ion
trapped on a surface electrode chip. We also demonstrate for the first time, to
the best of our knowledge, trapped-ion spectroscopy and qubit operations such
as Rabi oscillations and high fidelity (99%) qubit state preparation and
measurement (SPAM) using direct drive integrated photonic technologies without
bulk optic stabilization cavities or second harmonic generation. Our chip-scale
stabilized Brillouin laser exhibits a 6 kHz linewidth with the 0.4 Hz
quadrupole transition of $^{88}$Sr$^+$ and a self-consistent coherence time of
60 $\mu$s via Ramsey interferometry on the trapped ion qubit. Furthermore, we
demonstrate the stability of the locked Brillouin laser to 5$\times10^{-13}/
\sqrt{\tau}$ at 1 second using dual optical clocks.
