4 citations · 4 across the 2 of their papers we have counts for
9 papers · 1 filter
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…
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…
General mapping of multi-quit entanglement conditions to non-separability indicators for quantum optical fields
Junghee Ryu, Bianka Woloncewicz, Marcin Marciniak +2
We show that any multi-qudit entanglement witness leads to a non-separability indicator for quantum optical fields, which involves intensity correlations. We get, e.g., necessary a…
Sculpting out quantum correlations with bosonic subtraction
Marcin Karczewski, Su-Yong Lee, Junghee Ryu +3
We present a method to extract M-partie bosonic correlations from an N-partite maximally symmetric state (M < N) with the help of successive applications of single-boson subtractio…
Optical experiment to test negative probability in context of quantum-measurement selection
Junghee Ryu, Sunghyuk Hong, Joong-Sung Lee +6
Negative probability values have been widely employed as an indicator of the nonclassicality of quantum systems. Known as a quasiprobability distribution, they are regarded as a us…
Disproving hidden variable models with spin magnitude conservation
Pawel Kurzynski, Wieslaw Laskowski, Adrian Kolodziejski +3
The squares of the three components of the spin-s operators sum up to . However, a similar relation is rarely satisfied by the set of possible spin projections onto mutuall…