Trapped ion qubit and clock operations with a visible wavelength photonic coil resonator stabilized integrated Brillouin laser
arxiv(2024)
摘要
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 ^88Sr^+ 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
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 ^88Sr^+ and a self-consistent coherence time of
60 μs via Ramsey interferometry on the trapped ion qubit. Furthermore, we
demonstrate the stability of the locked Brillouin laser to 5×10^-13/
√(τ) at 1 second using dual optical clocks.
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