%0 Journal Article
%T A quantum memory intrinsic to single nitrogen–vacancy centres in diamond
%A Fuchs, G. D.
%A Burkard, G.
%A Klimov, P. V.
%A Awschalom, D. D.
%J Nature Physics
%D 2011
%V 7
%N 10
%F Fuchs_etal2011
%O exported from refbase (https://db.rplab.ru/refbase/show.php?record=823), last updated on Sat, 12 May 2012 15:07:11 -0500
%X A quantum memory, composed of a long-lived qubit coupled to each processing qubit, is important to building a scalable platform for quantum information science. These two qubits should be connected by a fast and high-fidelity operation to store and retrieve coherent quantum states. Here, we demonstrate a room-temperature quantum memory based on the spin of the nitrogen nucleus intrinsic to each nitrogen–vacancy (NV) centre in diamond. We perform coherent storage of a single NV centre electronic spin in a single nitrogen nuclear spin using Landau–Zener transitions across a hyperfine-mediated avoided level crossing. By working outside the asymptotic regime, we demonstrate coherent state transfer in as little as 120 ns with total storage fidelity of 88±6%. This work demonstrates the use of a quantum memory that is compatible with scaling as the nitrogen nucleus is deterministically present in each NV centre defect.
%K fromIPMRAS
%P 789-793