Research

last updated:

bold: PI

underline: researchers in QSTAR

Published

17

  1. Resource-compact time-optimal quantum computation

    Taewan Kim,Kyunghyun Baek,Yongsoo Hwang,Jeongho Bang

    Quantum Information Processing, 24, 193, 2025.

    arXiv:2405.00191.

  2. Robustness measures for quantifying nonlocality

    Kyunghyun Baek,Junghee Ryu,Jinhyoung Lee

    New Journal of Physics, 27(5), 053001, 2025.

    arXiv:2311.07077.

  3. Quantum superposing algorithm for quantum encoding

    Jaehee Kim,Taewan Kim,Kyunghyun Baek,Yongsoo Hwang,Joonsuk Huh,Jeongho Bang

    Physica Scripta, 99(11), 115110, 2024.

    arXiv:2409.19496.

  4. Global optimization in variational quantum algorithms via dynamic tunneling method

    Seung Park,Kyunghyun Baek,Seungjin Lee,Mahn-Soo Choi

    New Journal of Physics, 26(7), 073053, 2024.

    arXiv:2405.18783.

  5. Variational quantum state discriminator for supervised machine learning

    Dongkeun Lee,Kyunghyun Baek,Joonsuk Huh,Daniel K. Park

    Quantum Science and Technology, 9(1), 015017, 2024.

    arXiv:2303.03588.

  6. T-depth-optimized quantum search with quantum data-access machine

    Jung Jun Park,Kyunghyun Baek,M. S. Kim,Hyunchul Nha,Jaewan Kim,Jeongho Bang

    Quantum Science and Technology, 9(1), 015011, 2024.

    arXiv:2211.03941.

  7. Fundamental limits on concentrating and preserving tensorized quantum resources

    Jaehak Lee,Kyunghyun Baek,Jiyong Park,Jaewan Kim,Hyunchul Nha

    Physical Review Research, 4(4), 043070, 2022.

    arXiv:2104.12307.

  8. Quantifying non-Gaussianity of a quantum state by the negative entropy of quadrature distributions

    Jiyong Park,Jaehak Lee,Kyunghyun Baek,Hyunchul Nha

    Physical Review A, 104(3), 032415, 2021.

    arXiv:2109.14353.

  9. Average fidelity and fidelity deviation in noisy quantum teleportation

    Wooyeong Song,Junghee Ryu,Kyunghyun Baek,Jeongho Bang

    Journal of the Korean Physical Society, 78(6), 496–503, 2021.

    arXiv:2102.05396.

  10. Quantifying coherence of quantum measurements

    Kyunghyun Baek,Adel Sohbi,Jaehak Lee,Jaewan Kim,Hyunchul Nha

    New Journal of Physics, 22(9), 093019, 2020.

    arXiv:2008.03999.

  11. Necessary and sufficient condition for joint measurability

    Jeongwoo Jae,Kyunghyun Baek,Junghee Ryu,Jinhyoung Lee

    Physical Review A, 100(3), 032113, 2019.

    arXiv:1904.01785.

  12. Faithful measure of quantum non-Gaussianity via quantum relative entropy

    Jiyong Park,Jaehak Lee,Kyunghyun Baek,Se-Wan Ji,Hyunchul Nha

    Physical Review A, 100(1), 012333, 2019.

    arXiv:1809.02999.

  13. Entropic uncertainty relations via direct-sum majorization relation for generalized measurements

    Kyunghyun Baek,Hyunchul Nha,Wonmin Son

    Entropy, 21(3), 270, 2019.

    arXiv:1905.11109.

  14. Non-Gaussianity and entropy-bounded uncertainty relations: Application to detection of non-Gaussian entangled states

    Kyunghyun Baek,Hyunchul Nha

    Physical Review A, 98(4), 042314, 2018.

    arXiv:1811.10207.

  15. Unsharpness of generalized measurement and its effects in entropic uncertainty relations

    Kyunghyun Baek,Wonmin Son

    Scientific Reports, 6, 30228, 2016.

    arXiv:1607.01866.

  16. Entropic uncertainty relations for successive generalized measurements

    Kyunghyun Baek,Wonmin Son

    Mathematics, 4(2), 41, 2016.

    arXiv:1801.00897.

  17. Optimized entropic uncertainty for successive projective measurements

    Kyunghyun Baek,Tristan Farrow,Wonmin Son

    Physical Review A, 89(3), 032108, 2014.

    arXiv:1401.1013.

Preprints

12

  1. Quantum Folding in Chebyshev-Based Quantum Subspace Diagonalization

    Seung Park,Dongni Chen,Stefano Chesi,Kyunghyun Baek,Mahn-Soo Choi

    arXiv:2610.19922.

  2. Phase-Flag Access and No-Go Constraints on Quotient-Space Real Quantum Mechanics

    Jeongho Bang,Kyoungho Cho,Kyunghyun Baek

    arXiv:2609.20226.

  3. Hidden Complex Structure in Quotient-Space Real Quantum Mechanics

    Jeongho Bang,Kyoungho Cho,Kyunghyun Baek

    arXiv:2607.05865.

  4. Maximal coherence of quantum measurement and the resource theory of sharpness

    Kyunghyun Baek,Yonggi Jo,Hyunchul Nha

    arXiv:2607.05847.

  5. First-Quantized Relativistic Quantum Simulation with Periodic and Dirichlet Boundary Conditions

    Jeongho Bang,Timothy P. Spiller,Kyunghyun Baek,Kyoungho Cho,Jaewoo Joo

    arXiv:2606.21794.

  6. Finite Imaginary-Time Evolution for Polynomial Unconstrained Binary Optimization

    Jaehee Kim,Juhyeon Kim,Gwonhak Lee,Kyunghyun Baek,Daniel K. Park,Jeongho Bang,Joonsuk Huh

    arXiv:2604.27482.

  7. A Spin-Glass Metabolic Hamiltonian optimized by Quantum Annealing Reveals Configurational Regimes of Cancer Metabolism

    Ji-Yong Sung,Kyunghyun Baek,Inbeom Park,Jeongho Bang,Jae-Ho Cheong

    bioRxiv:2026.04.05.715441.

  8. Dual channel multi-product formulas

    Seung Park,Sangjin Lee,Kyunghyun Baek

    arXiv:2602.01713.

  9. Quantum Amplitude-Amplification Eigensolver: A State-Learning-Assisted Approach beyond Energy-Gradient-Based Heuristics

    Kyunghyun Baek,Seungjin Lee,Joonsuk Huh,Dongkeun Lee,Jinhyoung Lee,M. S. Kim,Jeongho Bang

    arXiv:2511.12062.

  10. Subspace Variational Quantum Simulation: Fidelity Lower Bounds as Measures of Training Success

    Seung Park,Dongkeun Lee,Jeongho Bang,Hoon Ryu,Kyunghyun Baek

    arXiv:2509.06360.

  11. Quantum Simulation of Dynamical Transition Rates in Open Quantum Systems

    Robson Christie,Kyunghyun Baek,Jeongho Bang,Jaewoo Joo

    arXiv:2412.17229.

  12. Generalized Euler angles for a unitary control of the Hamiltonian system

    Seungjin Lee,Kyunghyun Baek,Jeongho Bang

    arXiv:2304.14624.