2015/10/22 by C. Grezes, Cécile Grèzes, Y. Kubo +31 · 47 citations
Materials Science · Physics and Astronomy · #Advanced Fiber Laser Technologies #Charge qubit #Coherence (philosophical gambling strategy) #Condensed matter physics #Diamond and Carbon-based Materials Research #Flux qubit #Open quantum system #Phase qubit #Physics #Quantum #Quantum computer #Quantum information #Quantum mechanics #Quantum optics and atomic interactions #Quantum technology #Qubit #Spin (aerodynamics) #Spins #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1016/j.crhy.2016.07.006
published in Comptes Rendus Physique 17(7), 693-704 (Elsevier BV) · 27 pages, 7 figures
arxiv created 2015/10/22 · openalex publication_date 2016/07/27 · arxiv updated 2016/09/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.