Towards a Spin-Ensemble Quantum Memory for Superconducting Qubits

Design and Implementation of the Write, Read and Reset Steps

Nonfiction, Science & Nature, Technology, Superconductors & Superconductivity, Computers, Advanced Computing, Information Technology, Science
Cover of the book Towards a Spin-Ensemble Quantum Memory for Superconducting Qubits by Cécile Grèzes, Springer International Publishing
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Author: Cécile Grèzes ISBN: 9783319215723
Publisher: Springer International Publishing Publication: August 19, 2015
Imprint: Springer Language: English
Author: Cécile Grèzes
ISBN: 9783319215723
Publisher: Springer International Publishing
Publication: August 19, 2015
Imprint: Springer
Language: English

This work describes theoretical and experimental advances towards the realization of a hybrid quantum processor in which the collective degrees of freedom of an ensemble of spins in a crystal are used as a multi-qubit register for superconducting qubits. A memory protocol made of write, read and reset operations is first presented, followed by the demonstration of building blocks of its implementation with NV center spins in diamond. Qubit states are written by resonant absorption of a microwave photon in the spin ensemble and read out of the memory on-demand by applying Hahn echo refocusing techniques to the spins. The reset step is implemented in between two successive write-read sequences using optical repumping of the spins.

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This work describes theoretical and experimental advances towards the realization of a hybrid quantum processor in which the collective degrees of freedom of an ensemble of spins in a crystal are used as a multi-qubit register for superconducting qubits. A memory protocol made of write, read and reset operations is first presented, followed by the demonstration of building blocks of its implementation with NV center spins in diamond. Qubit states are written by resonant absorption of a microwave photon in the spin ensemble and read out of the memory on-demand by applying Hahn echo refocusing techniques to the spins. The reset step is implemented in between two successive write-read sequences using optical repumping of the spins.

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