Molecular One‐ and Two‐Qubit Systems with Very Long Coherence Times
Abstract: General‐purpose quantum computation and quantum simulation require multi‐qubit architectures with precisely defined, robust interqubit interactions, coupled with local addressability. This is an unsolved challenge, primarily due to scalability issues. These issues often derive from poor control over interqubit interactions. Molecular systems are promising materials for the realization of large‐scale quantum architectures, due to their high degree of positionability and the possibility to precisely tailor interqubit interactions. The simplest quantum architecture is the two‐qubit system, with which quantum gate operations can be implemented. To be viable, a two‐qubit system must possess long coherence times, the interqubit interaction must be well defined and the two qubits must also be addressable individually within the same quantum manipulation sequence. Here results are presented on the investigation of the spin dynamics of chlorinated triphenylmethyl organic radicals, in particular the perchlorotriphenylmethyl (PTM) radical, a mono‐functionalized PTM, and a biradical PTM dimer. Extraordinarily long ensemble coherence times up to 148 µs are found at all temperatures below 100 K. Two‐qubit and, importantly, individual qubit addressability in the biradical system are demonstrated. These results underline the potential of molecular materials for the development of quantum architectures.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Molecular One‐ and Two‐Qubit Systems with Very Long Coherence Times ; day:27 ; month:07 ; year:2023 ; extent:11
Advanced materials ; (27.07.2023) (gesamt 11)
- Creator
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Schäfter, Dennis
Wischnat, Jonathan
Tesi, Lorenzo
De Sousa, J. Alejandro
Little, Edmund
McGuire, Jake
Mas‐Torrent, Marta
Rovira, Concepció
Veciana, Jaume
Tuna, Floriana
Crivillers, Núria
Slageren, Joris van
- DOI
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10.1002/adma.202302114
- URN
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urn:nbn:de:101:1-2023072815272390924086
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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14.08.2025, 10:45 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Schäfter, Dennis
- Wischnat, Jonathan
- Tesi, Lorenzo
- De Sousa, J. Alejandro
- Little, Edmund
- McGuire, Jake
- Mas‐Torrent, Marta
- Rovira, Concepció
- Veciana, Jaume
- Tuna, Floriana
- Crivillers, Núria
- Slageren, Joris van
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Systematic improvements in transmon qubit coherence enabled by niobium surface encapsulation
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Systematic improvements in transmon qubit coherence enabled by niobium surface encapsulation
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