1. Quantum Technology Institute, Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, South Korea
2. Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
3. Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 37673, South Korea
4. Agency For Defense Development (ADD), Daejeon 34186, South Korea
5. Graduate School of Quantum Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea