64 citations · 94 across the 4 of their papers we have counts for
5 papers
Strategy of satellite QKD with passive high brightness entangled photon pair source
Jin-Woo Kim, Suseong Lim, Heonoh Kim +1
A high-brightness entangled photon pair (HBEPP) source is essential for conducting entanglement-based quantum key distribution (QKD) between a satellite and a ground station. While…
Violation of Bell inequality by four photon Greenberger Horne Zeilinger state with a phase from a warm atomic ensemble
Jiho Park, Junghee Ryu, Heonoh Kim +1
A Greenberger Horne Zeilinger (GHZ) entangled state with a phase is crucial for realizing desired multipartite quantum states for practical applications. Here, we report violations…
Highly bright photon-pair generation in Doppler-broadened ladder-type atomic system
Yoon-Seok Lee, Sang Min Lee, Heonoh Kim +1
We report a bright photon-pair source with a coincidence counting rate per input power (cps/mW) of tens of thousands, obtained via spontaneous four-wave mixing from a Doppler-broad…
Experimental demonstration of error-insensitive approximate universal-NOT gates
Sang Min Lee, Jeongho Bang, Heonoh Kim +3
We propose and experimentally demonstrate an approximate universal-NOT (U-NOT) operation that is robust against operational errors. In our proposal, the U-NOT operation is composed…
Construction of optimal witness for unknown two-qubit entanglement
H. S. Park, S. -S. B. Lee, H. Kim +2
Whether entanglement in a state can be detected, distilled, and quantified without full state reconstruction is a fundamental open problem. We demonstrate a new scheme encompassing…