9 papers
Beyond the Positive Partial Transpose Squared Conjecture: The Qutrit Case
Junhyeong An, Soojoon Lee
Entanglement swapping is a fundamental operation in quantum repeaters for establishing entanglement between distant parties. The positive partial transpose (PPT) squared conjecture…
Maximal extension on converse monogamy of entanglement for tripartite pure states
Junhyeong An, Soojoon Lee
Unlike classical correlations, entanglement cannot be freely shared among multiple parties. This unique feature of quantum systems is known as the monogamy of entanglement. While i…
Opposite amplitude phase entropy responses at a non Hermitian avoided crossing
Kyu-Won Park, Soojoon Lee, Kabgyun Jeong
Avoided crossings (A.C.) in open resonators arise from non-Hermitian mode interaction, where leakage produces complex spectra and biorthogonal eigenmodes. Intensity-based entropies…
Correlated Entropic Uncertainty as a Signature of Exceptional Points
Kyu-Won Park, Soojoon Lee, Kabgyun Jeong
Non-Hermitian physics has become a fundamental framework for understanding open systems where gain and loss play essential roles, with impact across photonics, quantum science, and…
Chaos-controlled switching between entanglement and coherence
Kyu-Won Park, Soojoon Lee, Kabgyun Jeong
Controlling entanglement and coherence is central to quantum information, yet the two resources often exhibit antagonistic trends and are difficult to optimize within a single plat…
Maneuvering measurement-coherence into measurement-entanglement
Ho-Joon Kim, Soojoon Lee
Quantum dynamics governs the transformation of static quantum resources, such as coherence and entanglement, in both quantum states and measurements. Prior studies have established…