17 citations · 36 across the 5 of their papers we have counts for
8 papers
Quantifying non-Gaussianity of a quantum state by the negative entropy of quadrature distributions
Jiyong Park, Jaehak Lee, Kyunghyun Baek +1
We propose a non-Gaussianity measure of a multimode quantum state based on the negentropy of quadrature distributions. Our measure satisfies desirable properties as a non-Gaussiani…
Average fidelity and fidelity deviation in noisy quantum teleportation
WooYeong Song, Junghee Ryu, Kyunghyun Baek +1
We analyze the average fidelity (say, F) and the fidelity deviation (say, D) in noisy-channel quantum teleportation. Here, F represents how well teleportation is performed on avera…
Quantifying coherence of quantum measurements
Kyunghyun Baek, Adel Sohbi, Jaehak Lee +2
In this work we investigate how to quantify the coherence of quantum measurements. First, we establish a resource theoretical framework to address the coherence of measurement and…
Entropic Uncertainty Relations via Direct-Sum Majorization Relation for Generalized Measurements
Kyunghyun Baek, Hyunchul Nha, Wonmin Son
We derive an entropic uncertainty relation for generalized positive-operator-valued measure (POVM) measurements via a direct-sum majorization relation using Schur concavity of entr…
Necessary and sufficient condition for joint measurability
Jeongwoo Jae, Kyunghyun Baek, Junghee Ryu +1
In order to analyze joint measurability of given measurements, we introduce a Hermitian operator-valued measure, called -measure, such that it has marginals of positive operator…
Non-Gaussianity and entropy-bounded uncertainty relations: Application to detection of non-Gaussian entangled states
Kyunghyun Baek, Hyunchul Nha
We suggest an improved version of Robertson-Schrödinger uncertainty relation for canonically conjugate variables by taking into account a pair of characteristics of states: non-Gau…