Skip to main content

Thank you for visiting You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.


Two qubits for the price of one ion

A Publisher Correction to this article was published on 15 August 2022

This article has been updated

Trapped ion quantum computers can use two different kinds of ion to avoid crosstalk between adjacent qubits. Encoding two different qubit types in only one ion species can achieve the same goal while reducing experimental complexity.

Your institute does not have access to this article

Access options

Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.

Fig. 1: Possible qubit encodings in a single ion species.

Change history


  1. Yang, H.-X. et al. Nat. Phys. (2022).

    Article  Google Scholar 

  2. Tan, T. R. et al. Nature 528, 380–383 (2015).

    ADS  Article  Google Scholar 

  3. Bruzewicz, C. D., McConnell, R., Stuart, J., Sage, J. M. & Chiaverini, J. npj Quantum Inf. 5, 102 (2019).

    ADS  Article  Google Scholar 

  4. Lin, Y. et al. Phys. Rev. Lett. 110, 153002 (2013).

    ADS  Article  Google Scholar 

  5. Home, J. P. et al. Phys. Rev. A 79, 050305 (2009).

    ADS  Article  Google Scholar 

  6. Erickson, S. D. et al. Phys. Rev. Lett. 128, 160503 (2022).

    ADS  Article  Google Scholar 

  7. Inlek, I. V., Crocker, C., Lichtman, M., Sosnova, K. & Monroe, C. R. Phys. Rev. Lett. 118, 250502 (2017).

    ADS  Article  Google Scholar 

  8. Monz, T. et al. Science 351, 1068–1070 (2016).

    ADS  MathSciNet  Article  Google Scholar 

  9. Allcock, D. T. C. et al. Appl. Phys. Lett. 119, 214002 (2021).

    ADS  Article  Google Scholar 

  10. Edmunds, C. L. et al. Phys. Rev. A 104, 012606 (2021).

    ADS  Article  Google Scholar 

Download references

Author information

Authors and Affiliations


Corresponding author

Correspondence to Cornelius Hempel.

Ethics declarations

Competing interests

The author declares no competing interests.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Hempel, C. Two qubits for the price of one ion. Nat. Phys. (2022).

Download citation

  • Published:

  • DOI:


Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing