48 citations · 65 across the 12 of their papers we have counts for
17 papers
Scalability and performance metrics for boson sampling devices
Dong-Gil Im, Chung-Hyun Lee, Joonsuk Huh +1
Linear-optical platforms provide a promising route to demonstrate quantum computational advantage, particularly through the boson sampling problem. While a boson sampling system sh…
Oscillator-Qubit Primitives for a Molecular Quantum Dynamics Simulator
Jungsoo Hong, Joonsuk Huh
Molecular quantum dynamics simulations that treat both electrons and nuclei quantum mechanically are crucial for predicting chemical reactions. With classical computation, a full w…
Algorithmic Design of Heralded Linear Optical Circuits for Multipartite Entanglement
Jaehee Kim, Hon Wai Lau, William J. Munro +2
Heralded multipartite entanglement is a key resource for various quantum information tasks. However, designing linear optical circuits that generate specific target states is gener…
Efficient Multi-Controlled Gate Implementation in Trapped-Ion Systems
Minhyeok Kang, Taejin Kim, Jungsoo Hong +1
Multi-controlled gates are essential primitives in quantum algorithms, yet implementing them via standard gate-level decompositions remains resource-intensive. We develop efficient…
Finite Imaginary-Time Evolution for Polynomial Unconstrained Binary Optimization
Jaehee Kim, Juhyeon Kim, Gwonhak Lee +4
Imaginary-time evolution is a standard primitive for ground-state preparation but is nonunitary, precluding direct quantum implementation. We develop Finite Imaginary-Time Evolutio…
Quantum Circuit Representation of Combinatorial Matrix Functions
Minhyeok Kang, Gwonhak Lee, Youngrong Lim +1
Permanents, hafnians, and loop-hafnians are combinatorial matrix functions closely related to perfect matchings in graphs. These matrix functions arise in the quantum amplitudes of…
Heralded Linear Optical Generation of Dicke States
Minhyeok Kang, Jaehee Kim, William J. Munro +2
Entanglement is a fundamental feature of quantum mechanics and a key resource for quantum information processing. Among multipartite entangled states, Dicke states …
Jacobi-Anger Density Estimation for Energy Distribution of Quantum States
Kyeongan Park, Gwonhak Lee, Minhyeok Kang +2
The energy distribution of a quantum state is essential for accurately estimating a molecule's ground state energy in quantum computing. Directly obtaining this distribution requir…
Oscillator-qubit generalized quantum signal processing for vibronic models: a case study of uracil cation
Jungsoo Hong, Seong Ho Kim, Seung Kyu Min +1
Hybrid oscillator-qubit processors have recently demonstrated high-fidelity control of both continuous- and discrete-variable information processing. However, most of the quantum a…
Filtered Quantum Phase Estimation
Gwonhak Lee, Minhyeok Kang, Jungsoo Hong +2
Accurate state preparation is a critical bottleneck in many quantum algorithms, particularly those for ground-state energy estimation. Even in fault-tolerant quantum computing, pre…
Quadratically Shallow Quantum Circuits for Hamiltonian Functions
Youngjun Park, Minhyeok Kang, Chae-Yeun Park +1
Many quantum algorithms for ground-state preparation and energy estimation require the implementation of high-degree polynomials of a Hamiltonian to achieve better convergence rate…
Doubling Qubits in a Trapped-Ion System via Vibrational Dual-Rail Encoding
Minhyeok Kang, Wentao Chen, Hyukjoon Kwon +2
Vibrational modes of trapped ions have traditionally served as quantum buses to mediate internal qubits. However, with recent advances in quantum control, it has become possible to…
Efficient Strategies for Reducing Sampling Error in Quantum Krylov Subspace Diagonalization
Gwonhak Lee, Seonghoon Choi, Joonsuk Huh +1
Within the realm of early fault-tolerant quantum computing (EFTQC), quantum Krylov subspace diagonalization (QKSD) has emerged as a promising quantum algorithm for the approximate…
Hardware-efficient ansatz without barren plateaus in any depth
Chae-Yeun Park, Minhyeok Kang, Joonsuk Huh
Variational quantum circuits have recently gained much interest due to their relevance in real-world applications, such as combinatorial optimizations, quantum simulations, and mod…
The hardness of quantum spin dynamics
Chae-Yeun Park, Pablo A. M. Casares, Juan Miguel Arrazola +1
Recent experiments demonstrated quantum computational advantage in random circuit sampling and Gaussian boson sampling. However, it is unclear whether these experiments can lead to…
Initial state preparation for quantum chemistry on quantum computers
Stepan Fomichev, Kasra Hejazi, Modjtaba Shokrian Zini +8
Quantum algorithms for ground-state energy estimation of chemical systems require a high-quality initial state. However, initial state preparation is commonly either neglected enti…
Universal Bound on Sampling Bosons in Linear Optics
Man-Hong Yung, Xun Gao, Joonsuk Huh
In linear optics, photons are scattered in a network through passive optical elements including beamsplitters and phase shifters, leading to many intriguing applications in physics…