Frequency Ratio of Two Optical Clock Transitions inYb+171and Constraints on the Time Variation of Fundamental Constants

An evaluation of the frequency shift caused by collisions with background gas in the primary frequency standard NPL-CsF2

(2014) Krzysztof Szymaniec et al.   IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL

First accuracy evaluation of NIST-F2

(2014) Thomas P Heavner et al.   METROLOGIA

An optical lattice clock with accuracy and stability at the 10−18 level

(2014) B. J. Bloom et al.   NATURE

A strontium lattice clock with 3 × 10−17inaccuracy and its frequency

(2014) Stephan Falke et al.   NEW JOURNAL OF PHYSICS

Agreement between two88Sr+optical clocks to 4 parts in 1017

(2014) G. P. Barwood et al.   PHYSICAL REVIEW A

Cs-based optical frequency measurement using cross-linked optical and microwave oscillators

(2014) Chr. Tamm et al.   PHYSICAL REVIEW A

Improved Limit on a Temporal Variation ofmp/mefrom Comparisons ofYb+and Cs Atomic Clocks

(2014) N. Huntemann et al.   PHYSICAL REVIEW LETTERS

New Limits on Variation of the Fine-Structure Constant Using Atomic Dysprosium

(2013) N. Leefer et al.   PHYSICAL REVIEW LETTERS

An Atomic Clock with 10-18 Instability

(2013) N. Hinkley et al.   SCIENCE

Progress in atomic fountains at LNE-SYRTE

(2012) J. Guena et al.   IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL

Absolute frequency measurement of the2S1/2–2F7/2electric octupole transition in a single ion of171Yb+with 10−15fractional uncertainty

(2012) S A King et al.   NEW JOURNAL OF PHYSICS

Generalized Ramsey Excitation Scheme with Suppressed Light Shift

(2012) N. Huntemann et al.   PHYSICAL REVIEW LETTERS

Sr+88445-THz Single-Ion Reference at the10−17Level via Control and Cancellation of Systematic Uncertainties and Its Measurement against the SI Second

(2012) Alan A. Madej et al.   PHYSICAL REVIEW LETTERS

Improved Tests of Local Position Invariance UsingRb87andCs133Fountains

(2012) J. Guéna et al.   PHYSICAL REVIEW LETTERS

High-Accuracy Optical Clock Based on the Octupole Transition inYb+171

(2012) N. Huntemann et al.   PHYSICAL REVIEW LETTERS

A Stringent Limit on a Drifting Proton-to-Electron Mass Ratio from Alcohol in the Early Universe

(2012) J. Bagdonaite et al.   SCIENCE

Improved accuracy of the NPL-CsF2 primary frequency standard: evaluation of distributed cavity phase and microwave lensing frequency shifts

(2011) Ruoxin Li et al.   METROLOGIA

Search for variation of fundamental constants and violations of fundamental symmetries using isotope comparisons

(2011) J. C. Berengut et al.   PHYSICAL REVIEW A

Indications of a Spatial Variation of the Fine Structure Constant

(2011) J. K. Webb et al.   PHYSICAL REVIEW LETTERS

Frequency measurement of the 2S1/2_2D3/2 electric quadrupole transition in a single 171yb+ ion

(2010) S. Webster et al.   IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL

Common-path self-referencing interferometer for carrier-envelope offset frequency stabilization with enhanced noise immunity

(2010) Veronika Tsatourian et al.   OPTICS LETTERS

Hyper-Ramsey spectroscopy of optical clock transitions

(2010) V. I. Yudin et al.   PHYSICAL REVIEW A

Frequency Comparison of Two High-AccuracyAl+Optical Clocks

(2010) C. Chou et al.   PHYSICAL REVIEW LETTERS

Transportable optical frequency comb based on a mode-locked fibre laser

(2008) B.R. Walton et al.   IET Optoelectronics

Relativistic corrections to transition frequencies ofAgI,DyI,HoI,YbII,YbIII,AuI, andHgIIand search for variation of the fine-structure constant

(2008) V. A. Dzuba et al.   PHYSICAL REVIEW A

Frequency Ratio of Al+ and Hg+ Single-Ion Optical Clocks; Metrology at the 17th Decimal Place

(2008) T. Rosenband et al.   SCIENCE