Original language | English |
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Pages (from-to) | 185-188 |
Number of pages | 4 |
Journal | Nature |
Volume | 476 |
Issue number | 7359 |
DOIs | |
State | Published - 10 Aug 2011 |
Externally published | Yes |
Bibliographical note
Funding Information:Acknowledgements Technical help with the microwave set-up by T. F. Gloger is acknowledged. We acknowledge support by the Bundesministerium für Bildung und Forschung (FK 01BQ1012 and P3352014), the Deutsche Forschungsgemeinschaft, the European Commission under the STREP PICC, the German-Israeli Foundation, secunet AG and the Alexander von Humboldt Foundation.