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

Bulletin of the American Physical Society

Suppression of collisional shifts via strong inter-atomic interactions in a $^{87}$Sr optical lattice clock

Michael J. Martin, Matthew D. Swallows, Michael Bishof, Yige Lin, Sebastian Blatt, Ana María Rey, Jun Ye

Published Jun 16, 2011• 0 citations
OpenAlex

Related papers

Suppression of collisional shifts in an optical lattice clock by trapping atoms in a 2D lattice

Matthew D. Swallows, Michael Bishof, Yige Lin +4 more

Bulletin of the American Physical Society•May 28, 2010•0 citations

Suppression of Collisional Shifts in a Strongly Interacting Lattice Clock

Matthew D. Swallows, Michael Bishof, Yige Lin +4 more

Optical lattice clocks with extremely stable frequency are possible when many atoms are interrogated simultaneously, but this precision may come at the cost of systematic inaccuracy resulting from atomic interactions. Density-dependent frequency shifts can occur even in a clock that uses fermionic atoms if they are subject to inhomogeneous optical excitation. However, sufficiently strong interactions can suppress collisional shifts in lattice sites containing more than one atom. We demonstrated the effectiveness of this approach with a strontium lattice clock by reducing both the collisional frequency shift and its uncertainty to the level of 10(-17). This result eliminates the compromise between precision and accuracy in a many-particle system; both will continue to improve as the number of particles increases.

arXiv:1007.0059•Science•Feb 4, 2011•181 citations

Systematic Study of the $^{87}$Sr Clock Transition in an Optical Lattice

Martin M. Boyd, Andrew D. Ludlow, Tanya Zelevinsky +5 more

Bulletin of the American Physical Society•May 18, 2006•58 citations

Operating a 87 Sr optical lattice clock with high precision and at high density

Matthew D. Swallows, Michael J. Martin, Michael Bishof +5 more

We describe recent experimental progress with the JILA Sr optical frequency standard, which has a systematic uncertainty at the 10-(16) fractional frequency level. An upgraded laser system has recently been constructed in our lab which may allow the JILA Sr standard to reach the standard quantum measurement limit and achieve record levels of stability. To take full advantage of these improvements, it will be necessary to operate a lattice clock with a large number of atoms, and systematic frequency shifts resulting from atomic interactions will become increasingly important. We discuss how collisional frequency shifts can arise in an optical lattice clock employing fermionic atoms and describe a novel method by which such systematic effects can be suppressed.

IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control•Mar 1, 2012•46 citations

Progress toward a Sr optical atomic clock in an optical lattice

Andrew D. Ludlow, T. Ido, Martin M. Boyd +5 more

Bulletin of the American Physical Society•May 18, 2005•0 citations

Resolved Atomic Interaction Sidebands in an Optical Clock Transition

Michael Bishof, Yige Lin, Matthew D. Swallows +3 more

We report the observation of resolved atomic interaction sidebands (ISB) in the (87)Sr optical clock transition when atoms at microkelvin temperatures are confined in a two-dimensional optical lattice. The ISB are a manifestation of the strong interactions that occur between atoms confined in a quasi-one-dimensional geometry and disappear when the confinement is relaxed along one dimension. The emergence of ISB is linked to the recently observed suppression of collisional frequency shifts. At the current temperatures, the ISB can be resolved but are broad. At lower temperatures, ISB are predicted to be substantially narrower and useful spectroscopic tools in strongly interacting alkaline-earth gases.

arXiv:1102.1016•Physical Review Letters•Jun 22, 2011•23 citations
Suppression of collisional shifts via strong inter-atomic interactions in a 87^{87}87Sr optical lattice clock
Optical lattice clocks with extremely stable frequency are possible when many atoms are interrogated simultaneously, but this precision may come at the cost of systematic inaccuracy resulting from atomic interactions. Density-dependent frequency shifts can occur even in a clock that uses fermionic atoms if they are subject to inhomogeneous optical excitation. However, sufficiently strong interactions can suppress collisional shifts in lattice sites containing more than one atom. We demonstrated the effectiveness of this approach with a strontium lattice clock by reducing both the collisional frequency shift and its uncertainty to the level of 10(-17). This result eliminates the compromise between precision and accuracy in a many-particle system; both will continue to improve as the number of particles increases.
Systematic Study of the 87^{87}87Sr Clock Transition in an Optical Lattice
We describe recent experimental progress with the JILA Sr optical frequency standard, which has a systematic uncertainty at the 10-(16) fractional frequency level. An upgraded laser system has recently been constructed in our lab which may allow the JILA Sr standard to reach the standard quantum measurement limit and achieve record levels of stability. To take full advantage of these improvements, it will be necessary to operate a lattice clock with a large number of atoms, and systematic frequency shifts resulting from atomic interactions will become increasingly important. We discuss how collisional frequency shifts can arise in an optical lattice clock employing fermionic atoms and describe a novel method by which such systematic effects can be suppressed.
We report the observation of resolved atomic interaction sidebands (ISB) in the (87)Sr optical clock transition when atoms at microkelvin temperatures are confined in a two-dimensional optical lattice. The ISB are a manifestation of the strong interactions that occur between atoms confined in a quasi-one-dimensional geometry and disappear when the confinement is relaxed along one dimension. The emergence of ISB is linked to the recently observed suppression of collisional frequency shifts. At the current temperatures, the ISB can be resolved but are broad. At lower temperatures, ISB are predicted to be substantially narrower and useful spectroscopic tools in strongly interacting alkaline-earth gases.