An optical clock to go

Bringing next-generation atomic clocks out of the lab is not an easy task, but doing so will unlock many new possibilities. As a crucial first step, a portable atomic clock has now been deployed for relativistic geodesy measurements in the Alps.

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.


  1. 1.

    Grotti, J. et al. Nat. Phys. (2018).

  2. 2.

    Katori, H., Takamoto, M., Pal’chikov, V. G. & Ovsiannikov, V. D. Phys. Rev. Lett. 91, 173005 (2013).

    ADS  Article  Google Scholar 

  3. 3.

    Boyd, M. et al. Science 314, 1430–1433 (2006).

    ADS  Article  Google Scholar 

  4. 4.

    Schioppo, M. et al. Nat. Photon. 11, 48–52 (2017).

    ADS  Article  Google Scholar 

  5. 5.

    Nicholson, T. et al. Nat. Commun. 6, 6896 (2015).

    Article  Google Scholar 

  6. 6.

    Chou, C. W., Hume, D. B., Rosenband, T. & Wineland, D. Science 329, 1630–1633 (2010).

    ADS  Article  Google Scholar 

  7. 7.

    Takano, T. et al. Nat. Photon. 10, 662–666 (2016).

    ADS  Article  Google Scholar 

  8. 8.

    Koller, S. B. et al. Phys. Rev. Lett. 118, 073601 (2017).

    ADS  Article  Google Scholar 

  9. 9.

    Pizzocaro, M. et al. Metrologia 54, 102–112 (2017).

    ADS  Article  Google Scholar 

Download references

Author information



Corresponding author

Correspondence to Andrew D. Ludlow.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Ludlow, A.D. An optical clock to go. Nature Phys 14, 431–432 (2018).

Download citation

Further reading