Tuning the Coherent Interaction of an Electron Qubit and a Nuclear Magnon
A central spin qubit interacting coherently with an ensemble of proximal spins can be used to engineer entangled collective states or a multiqubit register. Making full use of this many-body platform requires tuning the interaction between the central spin and its spin register. GaAs quantum dots of...
Saved in:
| Main Authors: | , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2025-04-01
|
| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.15.021004 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849762082354888704 |
|---|---|
| author | Noah Shofer Leon Zaporski Martin Hayhurst Appel Santanu Manna Saimon Covre da Silva Alexander Ghorbal Urs Haeusler Armando Rastelli Claire Le Gall Michał Gawełczyk Mete Atatüre Dorian A. Gangloff |
| author_facet | Noah Shofer Leon Zaporski Martin Hayhurst Appel Santanu Manna Saimon Covre da Silva Alexander Ghorbal Urs Haeusler Armando Rastelli Claire Le Gall Michał Gawełczyk Mete Atatüre Dorian A. Gangloff |
| author_sort | Noah Shofer |
| collection | DOAJ |
| description | A central spin qubit interacting coherently with an ensemble of proximal spins can be used to engineer entangled collective states or a multiqubit register. Making full use of this many-body platform requires tuning the interaction between the central spin and its spin register. GaAs quantum dots offer a model realization of the central spin system where an electron qubit interacts with multiple ensembles of ∼10^{4} nuclear spins. In this work, we demonstrate tuning of the interaction between the electron qubit and the nuclear many-body system in a GaAs quantum dot. The homogeneity of the GaAs system allows us to perform high-precision and isotopically selective nuclear sideband spectroscopy, which reveals the single-nucleus electronic Knight field. Together with time-resolved spectroscopy of the nuclear field, this fully characterizes the electron-nuclear interaction for a priori control. An algorithmic feedback sequence selects the nuclear polarization precisely, which adjusts the electron-nuclear exchange interaction in situ via the electronic g-factor anisotropy. This allows us to tune directly the activation rate of a collective nuclear excitation (magnon) and the coherence time of the electron qubit. Our method is applicable to similar central-spin systems and enables the programmable tuning of coherent interactions in the many-body regime. |
| format | Article |
| id | doaj-art-04ee5caa0eae4bcbb0d15a4c8d9b8143 |
| institution | DOAJ |
| issn | 2160-3308 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review X |
| spelling | doaj-art-04ee5caa0eae4bcbb0d15a4c8d9b81432025-08-20T03:05:50ZengAmerican Physical SocietyPhysical Review X2160-33082025-04-0115202100410.1103/PhysRevX.15.021004Tuning the Coherent Interaction of an Electron Qubit and a Nuclear MagnonNoah ShoferLeon ZaporskiMartin Hayhurst AppelSantanu MannaSaimon Covre da SilvaAlexander GhorbalUrs HaeuslerArmando RastelliClaire Le GallMichał GawełczykMete AtatüreDorian A. GangloffA central spin qubit interacting coherently with an ensemble of proximal spins can be used to engineer entangled collective states or a multiqubit register. Making full use of this many-body platform requires tuning the interaction between the central spin and its spin register. GaAs quantum dots offer a model realization of the central spin system where an electron qubit interacts with multiple ensembles of ∼10^{4} nuclear spins. In this work, we demonstrate tuning of the interaction between the electron qubit and the nuclear many-body system in a GaAs quantum dot. The homogeneity of the GaAs system allows us to perform high-precision and isotopically selective nuclear sideband spectroscopy, which reveals the single-nucleus electronic Knight field. Together with time-resolved spectroscopy of the nuclear field, this fully characterizes the electron-nuclear interaction for a priori control. An algorithmic feedback sequence selects the nuclear polarization precisely, which adjusts the electron-nuclear exchange interaction in situ via the electronic g-factor anisotropy. This allows us to tune directly the activation rate of a collective nuclear excitation (magnon) and the coherence time of the electron qubit. Our method is applicable to similar central-spin systems and enables the programmable tuning of coherent interactions in the many-body regime.http://doi.org/10.1103/PhysRevX.15.021004 |
| spellingShingle | Noah Shofer Leon Zaporski Martin Hayhurst Appel Santanu Manna Saimon Covre da Silva Alexander Ghorbal Urs Haeusler Armando Rastelli Claire Le Gall Michał Gawełczyk Mete Atatüre Dorian A. Gangloff Tuning the Coherent Interaction of an Electron Qubit and a Nuclear Magnon Physical Review X |
| title | Tuning the Coherent Interaction of an Electron Qubit and a Nuclear Magnon |
| title_full | Tuning the Coherent Interaction of an Electron Qubit and a Nuclear Magnon |
| title_fullStr | Tuning the Coherent Interaction of an Electron Qubit and a Nuclear Magnon |
| title_full_unstemmed | Tuning the Coherent Interaction of an Electron Qubit and a Nuclear Magnon |
| title_short | Tuning the Coherent Interaction of an Electron Qubit and a Nuclear Magnon |
| title_sort | tuning the coherent interaction of an electron qubit and a nuclear magnon |
| url | http://doi.org/10.1103/PhysRevX.15.021004 |
| work_keys_str_mv | AT noahshofer tuningthecoherentinteractionofanelectronqubitandanuclearmagnon AT leonzaporski tuningthecoherentinteractionofanelectronqubitandanuclearmagnon AT martinhayhurstappel tuningthecoherentinteractionofanelectronqubitandanuclearmagnon AT santanumanna tuningthecoherentinteractionofanelectronqubitandanuclearmagnon AT saimoncovredasilva tuningthecoherentinteractionofanelectronqubitandanuclearmagnon AT alexanderghorbal tuningthecoherentinteractionofanelectronqubitandanuclearmagnon AT urshaeusler tuningthecoherentinteractionofanelectronqubitandanuclearmagnon AT armandorastelli tuningthecoherentinteractionofanelectronqubitandanuclearmagnon AT clairelegall tuningthecoherentinteractionofanelectronqubitandanuclearmagnon AT michałgawełczyk tuningthecoherentinteractionofanelectronqubitandanuclearmagnon AT meteatature tuningthecoherentinteractionofanelectronqubitandanuclearmagnon AT dorianagangloff tuningthecoherentinteractionofanelectronqubitandanuclearmagnon |