Abstract
A Correction to this paper has been published: https://doi.org/10.1038/s41586-021-03367-9.
Subject terms: Exotic atoms and molecules, Experimental particle physics
Correction to: Nature 10.1038/s41586-020-2006-5Published online 19 February 2020
In this Article, in Fig. 1 and its legend, the 1Sb state should read |↑⇑⟩ (not |↑⇓⟩) and the 1Sa state should read |↑⇓⟩ (not |↑⇑⟩). Also in the legend to Fig. 1, the sentence “The symbol (↓,↑) in the figure indicates that the positron spin states are mixed for the 2Pc and 2Pf states” should read “The symbol (0, ↑) or (1, ↓) for the 2P states in the figure indicates that the positron spin states are mixed for the 2Pc and 2Pf states, where the first value (0 or 1) in the label corresponds to the magnetic quantum number mL of the orbital angular momentum L = 1 in the 2P state, while the second label ↑ or ↓ indicates the positron spin.” In Fig. 3b, the label ‘Singly spin-polarized’ should read ‘Doubly spin-polarized’. These errors do not affect any results or conclusions. The original Article has been corrected online.
Contributor Information
The ALPHA Collaboration:
M. Ahmadi, B. X. R. Alves, C. J. Baker, W. Bertsche, A. Capra, C. Carruth, C. L. Cesar, M. Charlton, S. Cohen, R. Collister, S. Eriksson, A. Evans, N. Evetts, J. Fajans, T. Friesen, M. C. Fujiwara, D. R. Gill, P. Granum, J. S. Hangst, W. N. Hardy, M. E. Hayden, E. D. Hunter, C. A. Isaac, M. A. Johnson, J. M. Jones, S. A. Jones, S. Jonsell, A. Khramov, P. Knapp, L. Kurchaninov, N. Madsen, D. Maxwell, J. T. K. McKenna, S. Menary, J. M. Michan, T. Momose, J. J. Munich, K. Olchanski, A. Olin, P. Pusa, C. Ø. Rasmussen, F. Robicheaux, R. L. Sacramento, M. Sameed, E. Sarid, D. M. Silveira, C. So, D. M. Starko, G. Stutter, T. D. Tharp, R. I. Thompson, D. P. van der Werf, and J. S. Wurtele