Abstract
Controlled interaction between localized and delocalized solid-state spin systems offers a compelling platform for on-chip quantum information processing with quantum spintronics. Hybrid quantum systems (HQSs) of localized nitrogen-vacancy (NV) centers in diamond and delocalized magnon modes in ferrimagnets - systems with naturally commensurate energies - have recently attracted significant attention, especially for interconnecting isolated spin qubits at length-scales far beyond those set by the dipolar coupling. However, despite extensive theoretical efforts, there is a lack of experimental characterization of the magnon-mediated interaction between NV centers, which is necessary to develop such hybrid quantum architectures. Here, we experimentally determine the magnon-mediated NV-NV coupling from the magnon-induced self-energy of NV centers. Our results are quantitatively consistent with a model in which the NV center is coupled to magnons by dipolar interactions. This work provides a versatile tool to characterize HQSs in the absence of strong coupling, informing future efforts to engineer entangled solid-state systems.
| Original language | English |
|---|---|
| Article number | e2313754120 |
| Number of pages | 6 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Volume | 121 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2 Jan 2024 |
Funding
We thank Xinghan Guo for preliminary sample preparations and Paul C. Jerger for helpful discussions. This work was primarily supported by the US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division (S.E.S., N.D., F.J.H., and D.D.A.) with additional support from Q-NEXT, a US Department of Energy Office of Science National Quantum Information Science Research Centers (M.F. and J.C.M.), and the Air Force Office of Scientific Research (M.F. and D.D.A.). This work made use of Pritzker Nanofabrication Facility, which receives support from the SHyNE; a node of the NSF's National Nanotechnology Coordinated Infrastructure (NSF ECCS-1542205). J.C.M. acknowledges prior support from the NSF Graduate Research Fellowship Program (grant no. DGE-1746045). L.R.W. acknowledges the support from the University of Chicago/Advanced Institute for Materials Research Joint Research Center. M.E.F. and D.R.C. acknowledge the support of the US Department of Energy, Office of Science, Basic Energy Sciences under Award No. DE-SC0019250. ACKNOWLEDGMENTS. We thank Xinghan Guo for preliminary sample preparations and Paul C. Jerger for helpful discussions. This work was primarily supported by the US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division (S.E.S., N.D., F.J.H., and D.D.A.) with additional support from Q-NEXT, a US Department of Energy Office of Science National Quantum Information Science Research Centers (M.F. and J.C.M.), and the Air Force Office of Scientific Research (M.F. and D.D.A.). This work made use of Pritzker Nanofabrication Facility, which receives support from the SHyNE; a node of the NSF\u2019s National Nanotechnology Coordinated Infrastructure (NSF ECCS-1542205). J.C.M. acknowledges prior support from the NSF Graduate Research Fellowship Program (grant no. DGE-1746045). L.R.W. acknowledges the support from the University of Chicago/Advanced Institute for Materials Research Joint Research Center. M.E.F. and D.R.C. acknowledge the support of the US Department of Energy, Office of Science, Basic Energy Sciences under Award No. DE-SC0019250.
Keywords
- condensed matter physics
- magnons
- quantum information
- spin qubits
- spintronics