"Magic" radio-frequency dressing for trapped atomic microwave clocks

Abstract

It has been proposed to use magnetically trapped atomic ensembles to enhance the interrogation time in microwave clocks. To mitigate the perturbing effects of the magnetic trap, near-magic-field configurations are employed, where the involved clock transition becomes independent of the atom's potential energy to first order. Still, higher order effects are a dominating source for dephasing, limiting the performance of this approach. Here we propose a simple method to cancel the energy dependence to both first and second order, using weak radio-frequency dressing. We give values for dressing frequencies, amplitudes, and trapping fields for 87Rb atoms and investigate quantitatively the robustness of these second-order-magic conditions to variations of the system parameters. We conclude that radio-frequency dressing can suppress field-induced dephasing by at least one order of magnitude for typical experimental parameters

11 pages, 9 figures, 1 table

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Cited by in corpus (16)

• Matter-wave interferometers using TAAP rings
• Sagnac interferometry with a single atomic clock
• Synthetic clock transitions via continuous dynamical decoupling
• Trapping atoms with radio-frequency adiabatic potentials
• Doubly magic optical trapping for Cs atom hyperfine clock transitions
• Robust optical clock transitions in trapped ions
• Continuously observing a dynamically decoupled spin-1 quantum gas
• Microwave spectroscopy of radio-frequency dressed ${}^{87}$Rb
• Triply magic conditions for microwave transitions of optically trapped alkali-metal atoms
• Extending the coherence time limit of a single-alkali-atom qubit by suppressing phonon-jumping-induced decoherence
• Enhancing the sensitivity of rotation in a multi-atom Sagnac interferometer
• Decoherence-free radiofrequency dressed subspaces
• Harmonic dual dressing of spin one-half systems
• Gate fidelity, dephasing, and "magic" trapping of optically trapped neutral atom
• Quantum Control of Two Critically Dressed Spin 1/2 Species in Magnetic Fluctuations
• openMMF: a library for multimode driven quantum systems