Mi-Ra Hwang
Kyungnam University
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Publication
Featured researches published by Mi-Ra Hwang.
Physical Review A | 2008
Eylee Jung; Mi-Ra Hwang; You Hwan Ju; Min-Soo Kim; Sahng-Kyoon Yoo; Hungsoo Kim; DaeKil Park; Jin-Woo Son; Sayatnova Tamaryan; Seong-Keuck Cha
Eylee Jung, Mi-Ra Hwang, You Hwan Ju, Min-Soo Kim, Sahng-Kyoon Yoo, Hungsoo Kim, D. K. Park, Jin-Woo Son, S. Tamaryan, Seong-Keuck Cha 1 Department of Physics, Kyungnam University, Masan, 631-701, Korea 2 Department of Mathematics, Kyungnam University, Masan, 631-701, Korea 3 Green University, Hamyang, 676-872, Korea 4 The Institute of Basic Science, Kyungnam University, Masan, 631-701, Korea 5 Theory Department, Yerevan Physics Institute, Yerevan-36, 375036, Armenia 6 Department of Chemistry, Kyungnam University, Masan, 631-701, Korea Abstract Which state does lose less quantum information between GHZ and W states when they are prepared for two-party quantum teleportation through noisy channel? We address this issue by solving analytically a master equation in the Lindbald form with introducing the noisy channels which makes the quantum channels to be mixed states. It is found that the answer of the question is dependent on the type of the noisy channel. If, for example, the noisy channel is (L2,x, L3,x, L4,x)-type where L s denote the Lindbald operators, GHZ state is always more robust than W state, i.e. GHZ state preserves more quantum information. In, however, (L2,y, L3,y, L4,y)-type channel the situation becomes completely reversed. In (L2,z, L3,z, L4,z)-type channel W state is more robust than GHZ state when the noisy parameter (κ) is comparatively small while GHZ state becomes more robust when κ is large. In isotropic noisy channel we found that both states preserve equal amount of quantum information. A relation between the average fidelity and entanglement for the mixed state quantum channels are discussed.
Physical Review A | 2011
Mi-Ra Hwang; DaeKil Park; Eylee Jung
Tripartite entanglement is examined when one of the three parties moves with a uniform acceleration with respect to other parties. As the Unruh effect indicates, tripartite entanglement exhibits a decreasing behavior with increasing acceleration. Unlike bipartite entanglement, however, tripartite entanglement does not completely vanish in the infinite acceleration limit. If the three parties, for example, share the Greenberger-Horne-Zeilinger or
Physical Review A | 2009
Eylee Jung; Mi-Ra Hwang; DaeKil Park; Jin-Woo Son
W
Journal of Physics A | 2008
Eylee Jung; Mi-Ra Hwang; DaeKil Park; Jin-Woo Son; Sayatnova Tamaryan
state initially, the corresponding
Physical Review A | 2008
Eylee Jung; Mi-Ra Hwang; Hungsoo Kim; Min-Soo Kim; DaeKil Park; Jin-Woo Son; Sayatnova Tamaryan
\ensuremath{\pi}
Classical and Quantum Gravity | 2012
Mi-Ra Hwang; Eylee Jung; DaeKil Park
-tangle, one of the measures of tripartite entanglement, is shown to be
Journal of Physics A | 2009
Levon Tamaryan; Hungsoo Kim; Eylee Jung; Mi-Ra Hwang; DaeKil Park; Sayatnova Tamaryan
\ensuremath{\pi}/6~0.524
Physical Review A | 2009
Eylee Jung; Mi-Ra Hwang; DaeKil Park; Hungsoo Kim; Eui-Soon Yim; Jin-Woo Son
or
International Journal of Quantum Information | 2013
Eylee Jung; Mi-Ra Hwang; DaeKil Park
0.176
Journal of Physics A | 2012
Eylee Jung; Mi-Ra Hwang; Chang-Soo Park; DaeKil Park
in this limit, respectively. This fact indicates that tripartite quantum-information processing may be possible even if one of the parties approaches the Rindler horizon. The physical implications of this striking result are discussed in the context of black-hole physics.