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5 papers · 2 filters
Generating "squeezed" superpositions of coherent states using photon addition and subtraction
P. Marek, H. Jeong, M. S. Kim
We study how photon addition and subtraction can be used to generate squeezed superpositions of coherent states in free-traveling fields (SSCSs) with high fidelities and large ampl…
Violations of Bell's inequality for Gaussian states with homodyne detection and nonlinear interactions
M. Paternostro, H. Jeong, T. C. Ralph
We show that homodyne measurements can be used to demonstrate violations of Bell's inequality with Gaussian states, when the local rotations used for these types of tests are imple…
Failure of Local Realism Revealed by Extremely Coarse-Grained Measurements
H. Jeong, M. Paternostro, T. C. Ralph
We show that failure of local realism can be revealed to observers for whom only extremely coarse-grained measurements are available. In our instances, Bell's inequality is violate…
Quantum states for perfectly secure secret sharing
Dong Pyo Chi, Jeong Woon Choi, Jeong San Kim +2
In this work, we investigate what kinds of quantum states are feasible to perform perfectly secure secret sharing, and present its necessary and sufficient conditions. We also show…
Monogamy equality in quantum systems
Dong Pyo Chi, Jeong Woon Choi, Kabgyun Jeong +3
There is an interesting property about multipartite entanglement, called the monogamy of entanglement. The property can be shown by the monogamy inequality, called the Coffman-Kund…