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Quantum control of systems plays an important role in modern science and technology. We focus in the spins in solids which are important platform for fundamental physical sciences. We take the NV centers in diamond as an example to show that the initialization, readout and high-fidelity operations of spin can be accomplished by advanced spin resonance techniques. I also would like to show our recent experiment which is to achieve the quantum control of single-spin system with non-Hermitian Hamiltonians [1] and thus enable further investigations of Non-Hermitian Physics in quantum system [2]. In the last part of my talk, I would like to show that the spins in solids have been taken as sensors to measure weak magnetic fields [3-5].
[1] Yang Wu et al., Observation of parity-time symmetry breaking in a single-spin system, Science 364, 878 (2019)
[2] Wenquan Liu et al., Dynamically Encircling an Exceptional Point in a Real Quantum System, Physical Review Letters 126, 170506(2021).
[3] Man Jiao et al., Experimental Constraint on an Exotic Parity-Odd Spin-and Velocity-Dependent Interaction with a Single Electron Spin Quantum Sensor, Physical Review Letters 127, 010501(2021)
[4] Xing Rong et al., Constraints on a Spin-Dependent Exotic Interaction between Electrons with Single Electron Spin Quantum Sensors, Physical Review Letters 121, 080402 (2018)
[5] Y. Zhu et al. Sunlight-driven quantum magnetometry. Physical Review X Energy 1, 033002 (2022).
Dr. Rong obtained his PhD in physics in 2011 at University of Science and Technology of China (USTC). Then he worked as postdoc in the School of Physical Sciences in USTC, and now is a professor in the School of Physical Sciences in USTC. His research interest is to develop the technology of pulsed EPR and to investigate its applications in the quantum information science.
Tencent meeting link: https://meeting.tencent.com/dm/A6R6Ts7Cx6Rh Meeting ID: 473 703 625