[1] Contrasting to point-to-point communication, quantum network channels contain advantages over classical counterparts with channel capacities. We have shown higher channel capacities in interferences channels of four parties.

[2] We have also devised a protocol for preserving optimal measuremements in long-distance quantum communication.

• [1] Non-Local Network Coding in Interference Channels
  Jiyoung Yun, Ashutosh Rai, and Joonwoo Bae, Physical Review Letters 125 150502 (2020)
• [2] Channel Coding of a Quantum Measurement
  S. Kechrimparis, C. M. Kropf, F. Wudarski, and J. Bae*, IEEE Journal on Selected Areas in Communications, Vol 38, No 3, 439 (2020)

[3] We are interested in quantum algorithms that outperfom classical cones. Our results include a generalization of quantum amplitude amplification

[4] and an improvement of quantum machine learning with probabilistic kernel tricks.

Quantum circuit for improving quantum machine learning

• Quantum amplitude amplification operators (QAAO)
  Hyeokjea Kwon and Joonwoo Bae, Physical Review A 104 062438 (2021)
• Feature Map for Quantum Data in Classification, Talk@IEEE International Conference on Quantum Communications, Networking, and Computing (QCNC 2024)
  Hyeokjea Kwon, Hojun Lee and Joonwoo Bae

[5] We are interested to certify the properties existing in quantum but not classical systems. We have verified contextual advantages in quantum measurements

[6] and certified randomness in quantum measurements.

• [5] Contextual Advantages and Certification for Maximum Confidence Discrimination
  Kieran Flatt, Hanwool Lee, Carles Roch i Carceller, Jonathan Bohr Brask, and Joonwoo Bae, PRX Quantum 3 030307 (2022)
• [6] Quantum vs. Noncontextual Semi-Device-Independent Randomness Certification
  Carles Roch i Carceller, Kieran Flatt, Hanwool Lee, Joonwoo Bae, and Jonathan Bohr Brask, Physical Review Letters 129 050501 (2022)

[7] The currently available quantum systems contain various types of noise. We have performed quantum tomography on realistic systems and verified crosstalk errors in measurements.

[8] We have developed a quantum protocol to mitigate errors in quantum measurements.

The schematic of quantum detector tomography for realistic quantum devices

• [7] Measurement crosstalk errors in cloud-based quantum computing
  Seungchan Seo and Joonwoo Bae, IEEE Internet Computing Vol 26 Issue 1 page 26-33 (2022)
• [8] A hybrid quantum-classical approach to mitigating measurement errors in quantum algorithms
  Hyeokjea Kwon and Joonwoo Bae, IEEE Transactions on Computers, Vol 70 (9) 1401 (2021)