Christian Sanner
University of Colorado Boulder
Elementary particlePauli exclusion principlePhysicsVortexIonDark matterExcited stateAtomPhysics beyond the Standard ModelAtomic physicsMaterials scienceAtomic clockSensitivity (control systems)Dimensionless quantityCondensed matter physicsComputational physicsFine-structure constantSpectroscopyBose–Einstein condensateMolecular physicsSymmetry (physics)FermionQuantum mechanicsDegenerate energy levelsFermi gasQuantum sensorOptical lattice
68Publications
19H-index
1,996Citations
Publications 60
Newest
#1Eric OelkerH-Index: 70
#2Ross B. Hutson (NIST: National Institute of Standards and Technology)H-Index: 10
Last. Jun YeH-Index: 5
view all 17 authors...
Optical atomic clocks require local oscillators with exceptional optical coherence owing to the challenge of performing spectroscopy on their ultranarrow-linewidth clock transitions. Advances in laser stabilization have thus enabled rapid progress in clock precision. A new class of ultrastable lasers based on cryogenic silicon reference cavities has recently demonstrated the longest optical coherence times to date. Here we utilize such a local oscillator with two strontium (Sr) optical lattice c...
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#1Nils HuntemannH-Index: 17
#2Christian SannerH-Index: 19
Last. Ekkehard PeikH-Index: 38
view all 8 authors...
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#1Christian SannerH-Index: 19
#2Nils HuntemannH-Index: 17
Last. Sergey G. PorsevH-Index: 33
view all 7 authors...
Questioning the presumably most basic assumptions about the structure of space and time has revolutionized our understanding of Nature. State-of-the-art atomic clocks make it possible to precisely test fundamental symmetry properties of spacetime, and search for physics beyond the standard model at low energy scales of just a few electron volts. Here, we experimentally demonstrate for the first time agreement of two single-ion clocks at the 10^{-18}level and directly confirm the validity of t...
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#1Marianna SafronovaH-Index: 44
#2S. G. PorsevH-Index: 7
Last. Jun YeH-Index: 126
view all 4 authors...
We propose a new frequency standard based on a 4f^{14} 6s6p~ ^3\!P_0 - 4f^{13} 6s^2 5d ~(J=2)transition in neutral Yb. This transition has a potential for high stability and accuracy and the advantage of the highest sensitivity among atomic clocks to variation of the fine-structure constant \alpha We find its dimensionless \alphavariation enhancement factor to be K=-15 in comparison to the most sensitive current clock (Yb^+E3, K=-6, and it is 18 times larger than in any neutral...
#1Eric OelkerH-Index: 70
#2Lindsay SonderhouseH-Index: 12
Last. Jun YeH-Index: 126
view all 19 authors...
#1Lindsay SonderhouseH-Index: 12
#2Eric OelkerH-Index: 70
Last. Jun YeH-Index: 126
view all 19 authors...
#1Lindsay SonderhouseH-Index: 12
#2Eric OelkerH-Index: 70
view all 20 authors...
#1Eric OelkerH-Index: 70
#2Lindsay SonderhouseH-Index: 12
view all 20 authors...
#1John Robinson (NIST: National Institute of Standards and Technology)H-Index: 17
#2Eric Oelker (NIST: National Institute of Standards and Technology)H-Index: 70
Last. Uwe Sterr (German National Metrology Institute)H-Index: 56
view all 12 authors...
We present the thermal noise limited performance of a cryogenic ultrastable silicon optical cavity operated at 4 K. A three-cornered comparison with two other ultrastable resonantors shows that the 4 K system is largely limited by a flicker frequency floor near 7\times 10^{-17}for averaging times from 5 seconds to 30 seconds.
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