29 citations · 30 across the 3 of their papers we have counts for
7 papers · 1 filter
Effect of Decoherence in Ekert-Protocol
DaeKil Park, Jin-Woo Son, Seong-Keuck Cha +1
We have examined the effect of the decoherence in the Ekert91 quantum cryptographic protocol. In order to explore this issue we have introduced two major decoherences, the depolari…
Attack of Many Eavesdroppers via Optimal Strategy in Quantum Cryptography
Eylee Jung, Mi-Ra Hwang, DaeKil Park +3
We examine a situation that eavesdroppers attack the Bennett-Brassard cryptographic protocol via their own optimal and symmetric strategies. Information gain and mutual informa…
Quantum Resonance near Optimal Eavesdropping in Quantum Cryptography
Eylee Jung, Mi-Ra Hwang, DaeKil Park +6
We find a resonance behavior in the disturbance when an eavesdropper chooses a near-optimal strategy intentionally or unintentionally when the usual Bennett-Brassard cryptographic…
Does three-tangle properly quantify the three-party entanglement for Greenberger-Horne-Zeilinger-type states?
Eylee Jung, DaeKil Park, Jin-Woo Son
Some mixed states composed of only GHZ states can be expressed in terms of only W-states. This fact implies that such states have vanishing three-tangle. One of such rank-3 states,…
Three-Tangle for Rank-3 Mixed States: mixture of Greenberger-Horne-Zeilinger, W and flipped W states
Eylee Jung, Mi-Ra Hwang, DaeKil Park +1
Three-tangle for the rank-three mixture composed of Greenberger-Horne-Zeilinger, W and flipped W states is analytically calculated. The optimal decompositions in the full range of…
Mixed-State Entanglement and Quantum Teleportation through Noisy Channels
Eylee Jung, Mi-Ra Hwang, DaeKil Park +2
The quantum teleportation with noisy EPR state is discussed. Using an optimal decomposition technique, we compute the concurrence, entanglement of formation and Groverian measure f…