Brookes, P;
Chang, T;
Szymanska, M;
Grosfeld, E;
Ginossar, E;
Stern, M;
(2022)
Protection of Quantum Information in a Chain of Josephson Junctions.
Physical Review Applied
, 17
(2)
, Article 024057. 10.1103/PhysRevApplied.17.024057.
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Abstract
Symmetry considerations are key to our understanding of the fundamental laws of nature. The presence of a symmetry implies that a physical system is invariant under specific transformations, and this invariance may have deep consequences. For instance, symmetry arguments state that a system will remain in its initial state if incentives to actions are equally balanced. Here, we apply this principle to a chain of qubits and show that it is possible to engineer the symmetries of its Hamiltonian in order to keep quantum information intrinsically protected from both relaxation and decoherence. We show that the coherence properties of this system are strongly enhanced relative to those of its individual components. Such a qubit chain can be realized using a simple architecture consisting of a relatively small number of superconducting Josephson junctions.
Type: | Article |
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Title: | Protection of Quantum Information in a Chain of Josephson Junctions |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1103/PhysRevApplied.17.024057 |
Publisher version: | https://doi.org/10.1103/PhysRevApplied.17.024057 |
Language: | English |
Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10145724 |
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