Cargando…
Experimental creation of quantum Zeno subspaces by repeated multi-spin projections in diamond
Repeated observations inhibit the coherent evolution of quantum states through the quantum Zeno effect. In multi-qubit systems this effect provides opportunities to control complex quantum states. Here, we experimentally demonstrate that repeatedly projecting joint observables of multiple spins crea...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5059787/ https://www.ncbi.nlm.nih.gov/pubmed/27713397 http://dx.doi.org/10.1038/ncomms13111 |
_version_ | 1782459478778576896 |
---|---|
author | Kalb, N. Cramer, J. Twitchen, D. J. Markham, M. Hanson, R. Taminiau, T. H. |
author_facet | Kalb, N. Cramer, J. Twitchen, D. J. Markham, M. Hanson, R. Taminiau, T. H. |
author_sort | Kalb, N. |
collection | PubMed |
description | Repeated observations inhibit the coherent evolution of quantum states through the quantum Zeno effect. In multi-qubit systems this effect provides opportunities to control complex quantum states. Here, we experimentally demonstrate that repeatedly projecting joint observables of multiple spins creates quantum Zeno subspaces and simultaneously suppresses the dephasing caused by a quasi-static environment. We encode up to two logical qubits in these subspaces and show that the enhancement of the dephasing time with increasing number of projections follows a scaling law that is independent of the number of spins involved. These results provide experimental insight into the interplay between frequent multi-spin measurements and slowly varying noise and pave the way for tailoring the dynamics of multi-qubit systems through repeated projections. |
format | Online Article Text |
id | pubmed-5059787 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-50597872016-10-26 Experimental creation of quantum Zeno subspaces by repeated multi-spin projections in diamond Kalb, N. Cramer, J. Twitchen, D. J. Markham, M. Hanson, R. Taminiau, T. H. Nat Commun Article Repeated observations inhibit the coherent evolution of quantum states through the quantum Zeno effect. In multi-qubit systems this effect provides opportunities to control complex quantum states. Here, we experimentally demonstrate that repeatedly projecting joint observables of multiple spins creates quantum Zeno subspaces and simultaneously suppresses the dephasing caused by a quasi-static environment. We encode up to two logical qubits in these subspaces and show that the enhancement of the dephasing time with increasing number of projections follows a scaling law that is independent of the number of spins involved. These results provide experimental insight into the interplay between frequent multi-spin measurements and slowly varying noise and pave the way for tailoring the dynamics of multi-qubit systems through repeated projections. Nature Publishing Group 2016-10-07 /pmc/articles/PMC5059787/ /pubmed/27713397 http://dx.doi.org/10.1038/ncomms13111 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Kalb, N. Cramer, J. Twitchen, D. J. Markham, M. Hanson, R. Taminiau, T. H. Experimental creation of quantum Zeno subspaces by repeated multi-spin projections in diamond |
title | Experimental creation of quantum Zeno subspaces by repeated multi-spin projections in diamond |
title_full | Experimental creation of quantum Zeno subspaces by repeated multi-spin projections in diamond |
title_fullStr | Experimental creation of quantum Zeno subspaces by repeated multi-spin projections in diamond |
title_full_unstemmed | Experimental creation of quantum Zeno subspaces by repeated multi-spin projections in diamond |
title_short | Experimental creation of quantum Zeno subspaces by repeated multi-spin projections in diamond |
title_sort | experimental creation of quantum zeno subspaces by repeated multi-spin projections in diamond |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5059787/ https://www.ncbi.nlm.nih.gov/pubmed/27713397 http://dx.doi.org/10.1038/ncomms13111 |
work_keys_str_mv | AT kalbn experimentalcreationofquantumzenosubspacesbyrepeatedmultispinprojectionsindiamond AT cramerj experimentalcreationofquantumzenosubspacesbyrepeatedmultispinprojectionsindiamond AT twitchendj experimentalcreationofquantumzenosubspacesbyrepeatedmultispinprojectionsindiamond AT markhamm experimentalcreationofquantumzenosubspacesbyrepeatedmultispinprojectionsindiamond AT hansonr experimentalcreationofquantumzenosubspacesbyrepeatedmultispinprojectionsindiamond AT taminiauth experimentalcreationofquantumzenosubspacesbyrepeatedmultispinprojectionsindiamond |