Room‐Temperature Quantum Memories Based on Molecular Electron Spin Ensembles

Whilst quantum computing has recently taken great leaps ahead, the development of quantum memories has decidedly lagged behind. Quantum memories are essential devices in the quantum technology palette and are needed for intermediate storage of quantum bit states and as quantum repeaters in long‐dist...

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Bibliographic Details
Published in:Advanced materials (Weinheim) Vol. 33; no. 30; pp. e2101673 - n/a
Main Authors: Lenz, Samuel, König, Dennis, Hunger, David, Slageren, Joris
Format: Journal Article
Language:English
Published: Germany Wiley Subscription Services, Inc 01.07.2021
John Wiley and Sons Inc
Subjects:
Coupling (molecular)
Cryogenic temperature
Electron spin
Materials science
microwave pulse storage
molecular quantum bits
organic radicals
Quantum computing
quantum memories
quantum technologies
Qubits (quantum computing)
Repeaters
Room temperature
quantum technologies
quantum memories
organic radicals
molecular quantum bits
microwave pulse storage
ISSN:0935-9648, 1521-4095, 1521-4095
Online Access:Get full text
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Summary:Whilst quantum computing has recently taken great leaps ahead, the development of quantum memories has decidedly lagged behind. Quantum memories are essential devices in the quantum technology palette and are needed for intermediate storage of quantum bit states and as quantum repeaters in long‐distance quantum communication. Current quantum memories operate at cryogenic, mostly sub‐Kelvin temperatures and require extensive and costly peripheral hardware. It is demonstrated that ensembles of weakly coupled molecular spins show long coherence times and can be used to store microwave pulses of arbitrary phase. These studies exploit strong coupling of the spin ensemble to special 3D microwave resonators. Most importantly, these systems operate at room temperature. Ensembles of weakly exchange coupled organic radicals form strongly coupled systems with 3D microwave resonators. Time‐domain pulsed microwave investigations reveal long, largely temperature‐independent quantum coherence times. The room‐temperature storage and retrieval of microwave pulses is demonstrated.
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ISSN:0935-9648
1521-4095
1521-4095
DOI:10.1002/adma.202101673