187 citations · 317 across the 24 of their papers we have counts for
24 papers
Generalized Entropy and Global Quantum Discord in Multi-party Quantum systems
Dong Pyo Chi, Jeong San Kim, Kyungjin Lee
Using Tsallis-q entropy, we introduce the generalized concept of global quantum discord, namely the q-global quantum discord, and provide its analytic evaluation for two classes of…
Approximate quantum state sharing via two private quantum channels
Dong Pyo Chi, Kabgyun Jeong
We investigate the approximate quantum state sharing protocol based on random unitary channels, which is secure against any exterior or interior attackers in principle. Although th…
Discretization of quantum pure states and local random unitary channel
Dong Pyo Chi, Kabgyun Jeong
We show that a quantum channel constructed by averaging over randomly chosen unitaries gives a local -randomizing map with non-negative p…
Concurrence of assistance and Mermin inequality on three-qubit pure states
Dong Pyo Chi, Kabgyun Jeong, Taewan Kim +2
We study a relation between the concurrence of assistance and the Mermin inequality on three-qubit pure states. We find that if a given three-qubit pure state has the minimal concu…
Multipartite bound entanglement and multi-setting Bell inequalities
Dong Pyo Chi, Kabgyun Jeong, Taewan Kim +2
Dür [Phys. Rev. Lett. {\bf 87}, 230402 (2001)] constructed -qubit bound entangled states which violate a Bell inequality for , and his result was recently improved by sh…
Non-static Quantum Bit Commitment
Jeong Woon Choi, Dowon Hong, Ku-Young Chang +2
Quantum bit commitment has been known to be impossible by the independent proofs of Mayers, and Lo and Chau, under the assumption that the whole quantum states right before the unv…