Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Journal of the Physical Society of Japan

Coherence of Spin-Polarized Fermions Interacting with a Clock Laser in a Stark-Shift-Free Optical Lattice(Atomic and molecular physics)

Masao Takamoto, Hidetoshi Katori

Published Jan 15, 2009• 0 citations
OpenAlex

Related papers

Improved Frequency Measurement of a One-Dimensional Optical Lattice Clock with a Spin-Polarized Fermionic ^ Sr Isotope(Atomic and molecular physics)

Masao Takamoto, Feng-Lei Hong, Ryoichi Higashi +3 more

Journal of the Physical Society of Japan•Oct 15, 2006•0 citations

Coherence of Spin-Polarized Fermions Interacting with a Clock Laser in a Stark-Shift-Free Optical Lattice

Masao Takamoto, Hidetoshi Katori

We investigated the coherence of spin-polarized ^{87}Sr atoms trapped in a light-shift-free one-dimensional optical lattice during their interaction with a clock laser on the ^1S_0-^3P_0 transition. Collapses and revivals appeared for more than 50 Rabi cycles, attributed to the thermal distribution of discrete vibrational states in the lattice potential. The population oscillation in the clock states lasted more than 1s, demonstrating high immunity from decoherence. This long atomic coherence suggests the feasibility of Pauli blocking of collisions in optical clock excitation.

arXiv:0901.1526•Journal of the Physical Society of Japan•Dec 25, 2008•19 citations

Spin–orbit-coupled fermions in an optical lattice clock

Shimon Kolkowitz, Sarah Bromley, Tobias Bothwell +6 more

arXiv:1608.03854•Nature•Dec 20, 2016•291 citations

Interacting fermions under spin-orbit coupling in an optical lattice clock

Sarah Bromley, Tobias Bothwell, Dhruv Kedar +4 more

Bulletin of the American Physical Society•Jun 8, 2017•0 citations

Hamiltonian engineering of spin-orbit–coupled fermions in a Wannier-Stark optical lattice clock

Alexander Aeppli, Anjun Chu, Tobias Bothwell +5 more

Engineering a Hamiltonian system with tunable interactions provides opportunities to optimize performance for quantum sensing and explore emerging phenomena of many-body systems. An optical lattice clock based on partially delocalized Wannier-Stark states in a gravity-tilted shallow lattice supports superior quantum coherence and adjustable interactions via spin-orbit coupling, thus presenting a powerful spin model realization. The relative strength of the on-site and off-site interactions can be tuned to achieve a zero density shift at a "magic" lattice depth. This mechanism, together with a large number of atoms, enables the demonstration of the most stable atomic clock while minimizing a key systematic uncertainty related to atomic density. Interactions can also be maximized by driving off-site Wannier-Stark transitions, realizing a ferromagnetic to paramagnetic dynamical phase transition.

arXiv:2201.05909•Science Advances•Oct 12, 2022•53 citations

Be optical lattice clocks with the fractional Stark shift up to the level of 10−19

Lei Wu, Xia Wang, Ting Wang +2 more

Abstract The energy levels and electric dipole ( E 1 ) matrix elements of the ground state and low-lying excited states of Be atoms are calculated using the relativistic configuration interaction plus core polarization (RCICP) method. The static and dynamic E 1 , magnetic dipole ( M 1 ) and electric quadrupole ( E 2 ) polarizabilities as well as the hyperpolarizabilities of the 2 s 2 1 S 0 and 2 s 2 p 3 P 0 states are determined. Two magic wavelengths, 300.03 and 252.28 nm, of 2 s 2 1 S 0 → 2 s 2 p 3 P 0 clock transition are found. Then, the multipolar and nonlinear Stark shifts of the clock transition at the magic wavelength are discussed in detail. We find that when the laser intensity I is in the range of 14.3–15.9 kW cm−2 and the detuning δ (the frequency detuning of the lattice laser frequency relative to the magic frequency) is in the range of 40.7–40.9 MHz, the fractional Stark shifts of the clock transition are less than 1.0 × 10−18. While, when I is in the range of 15.01–15.46 kW cm−2 and δ is in the range of 40.73–40.76 MHz, the fractional Stark shifts are lower than 1.0 × 10−19.

arXiv:2211.02259•New Journal of Physics•Mar 28, 2023•7 citations
We investigated the coherence of spin-polarized ^{87}Sr atoms trapped in a light-shift-free one-dimensional optical lattice during their interaction with a clock laser on the ^1S_0-^3P_0 transition. Collapses and revivals appeared for more than 50 Rabi cycles, attributed to the thermal distribution of discrete vibrational states in the lattice potential. The population oscillation in the clock states lasted more than 1s, demonstrating high immunity from decoherence. This long atomic coherence suggests the feasibility of Pauli blocking of collisions in optical clock excitation.
Engineering a Hamiltonian system with tunable interactions provides opportunities to optimize performance for quantum sensing and explore emerging phenomena of many-body systems. An optical lattice clock based on partially delocalized Wannier-Stark states in a gravity-tilted shallow lattice supports superior quantum coherence and adjustable interactions via spin-orbit coupling, thus presenting a powerful spin model realization. The relative strength of the on-site and off-site interactions can be tuned to achieve a zero density shift at a "magic" lattice depth. This mechanism, together with a large number of atoms, enables the demonstration of the most stable atomic clock while minimizing a key systematic uncertainty related to atomic density. Interactions can also be maximized by driving off-site Wannier-Stark transitions, realizing a ferromagnetic to paramagnetic dynamical phase transition.
Abstract The energy levels and electric dipole ( E 1 ) matrix elements of the ground state and low-lying excited states of Be atoms are calculated using the relativistic configuration interaction plus core polarization (RCICP) method. The static and dynamic E 1 , magnetic dipole ( M 1 ) and electric quadrupole ( E 2 ) polarizabilities as well as the hyperpolarizabilities of the 2 s 2 1 S 0 and 2 s 2 p 3 P 0 states are determined. Two magic wavelengths, 300.03 and 252.28 nm, of 2 s 2 1 S 0 → 2 s 2 p 3 P 0 clock transition are found. Then, the multipolar and nonlinear Stark shifts of the clock transition at the magic wavelength are discussed in detail. We find that when the laser intensity I is in the range of 14.3–15.9 kW cm−2 and the detuning δ (the frequency detuning of the lattice laser frequency relative to the magic frequency) is in the range of 40.7–40.9 MHz, the fractional Stark shifts of the clock transition are less than 1.0 × 10−18. While, when I is in the range of 15.01–15.46 kW cm−2 and δ is in the range of 40.73–40.76 MHz, the fractional Stark shifts are lower than 1.0 × 10−19.