Experimental study of magnetically insensitive transitions in ultracold Fermi gas of ${}^{40}$K

Abstract

This paper presents an experimental study of microwave single-photon transitions that are magnetic-field-insensitive in degenerate Fermi gases of ${}^{40}$K. This contrasts with microwave single-photon clock transitions for 0-0 magnetic-field-insensitive states and two-photon clock transitions for non 0-0 magnetic-field-insensitive states in bosonic alkali metal atoms. We show that there are two sets of special transitions between two different hyperfine ground states ($|F$=9/2, $m_F$=1/2$⟩$ $\iff$ $|$7/2, -1/2$⟩$ and $|$9/2, -1/2$⟩$ $\iff$ $|$7/2, 1/2$⟩$), whose microwave single-photon transition frequency is insensitive to low magnetic fields, as the first-order Zeeman shift is almost completely canceled. By using the microwave spectrum and Ramsey interference fringes, we demonstrate the long-time stability of the coherent transition under magnetic field fluctuations. These magnetic-field-insensitive microwave hyperfine transitions in ultracold ${}^{40}$K Fermi gases offer promising applications in quantum information and precision measurements.

References in corpus (34)

• A spin-orbit coupled Bose-Einstein condensate
• Logical quantum processor based on reconfigurable atom arrays
• Spin-Orbit Coupled Degenerate Fermi Gases
• A Rydberg Quantum Simulator
• High-fidelity parallel entangling gates on a neutral atom quantum computer
• Experimental realization of a two-dimensional synthetic spin-orbit coupling in ultracold Fermi gases
• Measurement of positive and negative scattering lengths in a Fermi gas of atoms
• Radio-Frequency Spectroscopy of Ultracold Fermions
• Imaging the Mott Insulator Shells using Atomic Clock Shifts
• Effect of cold collisions on spin coherence and resonance shifts in a magnetically trapped ultra-cold gas
• Coherent manipulation of Bose-Einstein condensates with state-dependent microwave potentials on an atom chip
• A clock with $8\times 10^{-19}$ systematic uncertainty
• Sodium Bose-Einstein Condensates in the F=2 State in a Large-volume Optical Trap
• Probing Interactions between Ultracold Fermions
• Coherent population trapping resonances with linearly polarized light for all-optical miniature atomic clocks
• Inner-shell clock transition in atomic thulium with small BBR shift
• Bose-Einstein Condensate in a light-induced vector potential using the 1064 $nm$ optical dipole trap lasers
• Enhancement of Rydberg atom interactions using ac Stark shifts
• Dispersive optical systems for scalable Raman driving of hyperfine qubits
• Precision Measurement of the 87-Rb Tune-Out Wavelength in the Hyperfine Ground State F=1 at 790 nm
• Extended coherence time on the clock transition of optically trapped Rubidium
• Controlling the magnetic field sensitivity of atomic clock states by microwave dressing
• Ultra-low noise magnetic field for quantum gases
• A new scheme of compact cold atom clock based on diffuse laser cooling in a cylindrical cavity
• Differential Light Shift Cancellation in a Magnetic-Field-Insensitive Transition of ${}^{87}$Rb
• Survey of hyperfine structure measurements in alkali atoms
• Spectral shift and dephasing of electromagnetically induced transparency in an interacting Rydberg gas
• Generation of high-purity, low-temperature samples of ${}^{39}$K for applications in metrology
• Hyperfine effects on potassium tune-out wavelengths and polarizabilities
• Ramsey imaging of optical traps
• Momentum-resolved Raman spectroscopy of bound molecules in ultracold Fermi gas
• Momentum-resolved Raman spectroscopy of non-interacting ultracold Fermi gas
• Atom interferometry using ${\sigma }^{+}$-${\sigma }^{-}$ Raman transitions between $F=1,m_F=\mp 1$ and $F=2,m_F=\pm 1$
• Chiral Raman coupling for spin-orbit coupling in ultracold atomic gases