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Towards a spin-ensemble quantum memory for superconducting qubits

At a Glance

Section titled “At a Glance”
MetadataDetails
Publication Date2016-07-27
JournalComptes Rendus Physique
AuthorsCÊcile Grèzes, Yuimaru Kubo, Brian Julsgaard, T. Umeda, Junichi Isoya
InstitutionsUniversity of California, Los Angeles, Centre National de la Recherche Scientifique
Citations43

Abstract

Section titled “Abstract”

This article reviews efforts to build a new type of quantum device, which combines an ensemble of electronic spins with long coherence times, and a small-scale superconducting quantum processor. The goal is to store over long times arbitrary qubit states in orthogonal collective modes of the spin-ensemble, and to retrieve them on-demand. We first present the protocol devised for such a multi-mode quantum memory. We then describe a series of experimental results using NV (as in nitrogen vacancy) center spins in diamond, which demonstrate its main building blocks: the transfer of arbitrary quantum states from a qubit into the spin ensemble, and the multi-mode retrieval of classical microwave pulses down to the single-photon level with a Hahn-echo like sequence. A reset of the spin memory is implemented in-between two successive sequences using optical repumping of the spins.

Tech Support

Section titled “Tech Support”

Original Source

Section titled “Original Source”

References

Section titled “References”
  1. 2013 - Coherent Josephson qubit suitable for scalable quantum integrated circuits [Crossref]
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  5. 2013 - Proposal for a coherent quantum memory for propagating microwave photons [Crossref]
  6. 2010 - Storage of multiple coherent microwave excitations in an electron spin ensemble
  7. 2013 - Solid-state electronic spin coherence time approaching one second [Crossref]
  8. 2006 - Nitrogen-vacancy center in diamond: model of the electronic structure and associated dynamics [Crossref]
  9. 2013 - Quantum memory for microwave photons in an inhomogeneously broadened spin ensemble [Crossref]
  10. 2011 - Revival of silenced echo and quantum memory for light [Crossref]

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