Lee, Junghyun Tatsuta, Mamiko Xu, Andrew Bauch, Erik Ku, Mark J. H. Walsworth, Ronald L. 2024-01-19T09:02:03Z 2024-01-19T09:02:03Z 2023-08-24 2023-08 2056-6387 https://pubs.kist.re.kr/handle/201004/113411 Strong interactions between defect spins in many-body solid-state quantum systems are a crucial resource for exploring non-classical states. However, they face the key challenge of controlling interactions between the defect spins, since they are spatially fixed inside the host lattice. In this work, we present a dressed state approach to control the effective dipolar coupling between solid-state spins and demonstrate this scheme experimentally using two strongly-coupled nitrogen vacancy (NV) centers in diamond. Through Ramsey spectroscopy on the sensor spin, we detect the change of the effective dipolar field generated by the control spin prepared in different dressed states. To observe the change of interaction dynamics, we deploy spin-lock-based polarization transfer measurements between the two NV spins in different dressed states. This scheme allows us to control the distribution of interaction strengths in strongly interacting spin systems, which can be a valuable tool for generating multi-spin correlated states for quantum-enhanced sensing. English The University of New South Wales (UNSW Australia) | Nature Publishing Group Dressed-state control of effective dipolar interaction between strongly-coupled solid-state spins Article 10.1038/s41534-023-00743-3 1 npj Quantum Information, v.9, no.1 npj Quantum Information 9 1 Y scie scopus 001040939000001 2-s2.0-85167431317 Quantum Science & Technology Physics, Applied Physics, Atomic, Molecular & Chemical Physics, Condensed Matter Physics Article