New horizons: Scalar and vector ultralight dark matter

D Antypas, A Banerjee, C Bartram… - arxiv preprint arxiv …, 2022‏ - arxiv.org
The last decade has seen unprecedented effort in dark matter model building at all mass
scales coupled with the design of numerous new detection strategies. Transformative …

176Lu+ clock comparison at the 10−18 level via correlation spectroscopy

Z Zhiqiang, KJ Arnold, R Kaewuam, MD Barrett - Science Advances, 2023‏ - science.org
The extreme precision of optical atomic clocks has led to an anticipated redefinition of the
second by the International System of Units. Furthermore, accuracies pushing the boundary …

Simultaneous bicolor interrogation in thulium optical clock providing very low systematic frequency shifts

AA Golovizin, DO Tregubov, ES Fedorova… - Nature …, 2021‏ - nature.com
Optical atomic clocks have already overcome the eighteenth decimal digit of instability and
uncertainty, demonstrating incredible control over external perturbations of the clock …

Prospects of a Ion Clock

K Beloy - Physical review letters, 2021‏ - APS
We propose a high-performance atomic clock based on the 1.81 PHz transition between the
ground and first-excited state of doubly ionized lead. Utilizing an even isotope of lead, both …

Multi-ion frequency reference using dynamical decoupling

L Pelzer, K Dietze, VJ Martínez-Lahuerta, L Krinner… - Physical Review Letters, 2024‏ - APS
We present the experimental realization of a continuous dynamical decoupling scheme
which suppresses leading frequency shifts in a multi-ion frequency reference based on Ca+ …

Simultaneous preparation of two initial clock states in a thulium optical clock

E Fedorova, A Golovizin, D Tregubov, D Mishin… - Physical Review A, 2020‏ - APS
Because of the low sensitivity of a thulium optical clock to black-body radiation and good
accuracy and stability estimations, it is considered as a promising transportable optical …

Coherent suppression of tensor frequency shifts through magnetic field rotation

R Lange, N Huntemann, C Sanner, H Shao… - Physical Review Letters, 2020‏ - APS
We introduce a scheme to coherently suppress second-rank tensor frequency shifts in
atomic clocks, relying on the continuous rotation of an external magnetic field during the free …

Operating a multi-ion clock with dynamical decoupling

N Akerman, R Ozeri - Physical Review Letters, 2025‏ - APS
We study and characterize a quasicontinuous dynamical decoupling scheme that effectively
suppresses dominant frequency shifts in a multi-ion optical clock. Addressing the challenge …

Quadrupole transitions and quantum gates protected by continuous dynamic decoupling

VJ Martínez-Lahuerta, L Pelzer, K Dietze… - Quantum Science …, 2023‏ - iopscience.iop.org
Dynamical decoupling techniques are a versatile tool for engineering quantum states with
tailored properties. In trapped ions, nested layers of continuous dynamical decoupling …

Combined microwave and optical spectroscopy for hyperfine structure analysis in thulium atoms

D Mishin, D Tregubov, N Kolachevsky, A Golovizin - Physical Review A, 2024‏ - APS
We present refined values of the hyperfine splitting frequencies of the ground| g〉=| 4 f 13 (2
F o) 6 s 2, J= 7/2〉 and clock| c〉=| 4 f 13 (2 F o) 6 s 2, J= 5/2〉 states of thulium atoms, fg …