8 citations · 19 across the 8 of their papers we have counts for
7 papers · 1 filter
Bayesian and geometric analyses of power spectral densities of spin qubits in Si/SiGe quantum dot devices
Yujun Choi, Hruday Mallubhotla, Mark Friesen +2
Charge noise with a power-law spectrum poses a significant challenge to high-fidelity operation of spin qubits in semiconductor devices. Recently, considerable experimental work ch…
Using stochastic resonance of two-level systems to increase qubit decoherence times
Yujun Choi, S. N. Coppersmith, Robert Joynt
Two-level systems (TLS) are the major source of dephasing of spin qubits in numerous quantum computing platforms. In spite of much effort, it has been difficult to substantially mi…
Interacting Random-field Dipole Defect Model for Heating in Semiconductor-based Qubit Devices
Yujun Choi, Robert Joynt
Semiconductor qubit devices suffer from the drift of important device parameters as they are operated. The most important example is a shift in qubit operating frequencies. This ef…
Anisotropy with respect to the applied magnetic field of spin qubit decoherence times
Yujun Choi, Robert Joynt
Electron spin qubits are a promising platform for quantum computation. Environmental noise impedes coherent operations by limiting the qubit relaxation () and dephasing (…
Single-Copy Certification of Two-Qubit Gates without Entanglement
Yujun Choi, Tanmay Singal, Young-Wook Cho +5
A quantum state transformation can be generally approximated by single- and two-qubit gates. This, however, does not hold with noisy intermediate-scale quantum technologies due to…
Generation of a non-zero discord bipartite state with classical second-order interference
Yujun Choi, Kang-Hee Hong, Hyang-Tag Lim +7
We report investigation on quantum discord in classical second-order interference. In particular, we theoretically show that a bipartite state with D = 0.311 of discord can be gene…
Plug-and-Play Measurement-Device-Independent Quantum Key Distribution
Yong-Su Kim, Yujun Choi, Osung Kwon +2
Quantum key distribution (QKD) gaurantees unconditional communication security based on the laws of quantum physics. However, practical QKD suffers from a number of quantum hacking…