Storage of multiple coherent microwave excitations in an electron spin ensemble

Hua Wu, Richard E. George, Janus H. Wesenberg, Klaus Mølmer, David I. Schuster, Robert J. Schoelkopf, Kohei M. Itoh, Arzhang Ardavan, John J.L. Morton, G. Andrew D. Briggs

Research output: Contribution to journalArticlepeer-review

157 Citations (Scopus)


Strong coupling between a microwave photon and electron spins, which could enable a long-lived quantum memory element for superconducting qubits, is possible using a large ensemble of spins. This represents an inefficient use of resources unless multiple photons, or qubits, can be orthogonally stored and retrieved. Here we employ holographic techniques to realize a coherent memory using a pulsed magnetic field gradient and demonstrate the storage and retrieval of up to 100 weak 10 GHz coherent excitations in collective states of an electron spin ensemble. We further show that such collective excitations in the electron spin can then be stored in nuclear spin states, which offer coherence times in excess of seconds.

Original languageEnglish
Article number140503
JournalPhysical review letters
Issue number14
Publication statusPublished - 2010 Sept 27

ASJC Scopus subject areas

  • General Physics and Astronomy


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