The 27th International Conference on Atomic Physics

Delay-line based adiabatic spin-dependent kicks on a hyperfine manifold

Not scheduled

1h 30m

Abstract of recent or ongoing work (by remote / virtual participant) Quantum information: gates, sensing, communication, and thermodynamics Abstracts by remote participants

Description

Significant aspects of advanced quantum technology today rely on rapid Raman control of atomic hyperfine matterwaves. Unfortunately, efficient Raman excitations are usually accompanied by uncompensated dynamic phases and coherent spin-leakages, preventing accurate and repetitive transfer of recoil momentum to large samples. We provide systematic study to demonstrate that the limitations can be substantially overcame by dynamically pogramming an adiabatic pulse sequence.
Experimentally, counter-propagating frequency-chirped pulses are programmed on an optical delay line to parallelly drive five $\Delta m=0$ hyperfine Raman transitions of ${}^{85}{\rm{Rb}}$ atoms for spin-dependent kick (SDK) within $\tau =40ns$, with an $f_{SDK}≈97.6\%$ inferred fidelity. Aided by numerical modeling, we demonstrate that by alternating the chirps of successive pulses in a balanced fashion, accumulation of non-adiabatic errors including the spin-leakages can be managed, while the dynamic phases can be robustly cancelled. Operating on a phase-stable delay line, the method supports precise, fast, and flexible control of spinor matterwave with efficient Raman excitations.