102 citations · 181 across the 17 of their papers we have counts for
17 papers
Mean-State Entropy Hierarchies and Classical Communication through Quantum Convolutions
Chunhe Xiong, Sunho Kim, Qing-hua Zhang +2
Quantum convolution provides a discrete-variable analogue of classical convolution, with the mean state capturing the stabilizer structure preserved under repeated convolution. We…
Private Capacity of Quantum Channels Induced by Non-stabilizer Environmental States
Chunhe Xiong, Sunho Kim, Long Long +1
We investigate the private capacity of quantum channels using the recently proposed quantum convolution theory for discrete-variable quantum systems. We focus on the role of the ma…
Quantum Defect Analysis and Target-Orbit-Directed Correction via the Purpose-Oriented Framework: Applications to Entanglement Repairability and Teleportation Activation
Sunho Kim, Chunhe Xiong, Junde Wu
Quantum resource theories quantify advantages but suffer from ambiguous free sets, limiting target-oriented missions. We improve upon this by introducing a purpose-oriented framewo…
Quanutm-State Texture as a Resource: Measures and Nonclassical Interdependencies
Yuntao Cui, Zhaobing Fan, Sunho Kim
Quantum-state texture is a newly recognized quantum resource that has garnered attention with the advancement of quantum theory. In this work, we address several key aspects of qua…
Relative Quantum Resource Theory and Operational Applications in Subchannel Discrimination
Sunho Kim, Chunhe Xiong, Junde Wu
A central problem in quantum resource theory is to give operational meaning to quantum resources that can provide clear advantages in certain physical tasks compared to the convex…
Entanglement as the cross-symmetric part of quantum discord
Chunhe Xiong, Sunho Kim, Asutosh Kumar +3
In this paper, we show that the minimal quantum discord over "cross-symmetric" state extensions is an entanglement monotone. In particular, we show that the minimal Bures distance…
Partial coherence versus entanglement
Sunho Kim, Chunhe Xiong, Shunlong Luo +2
We study partial coherence and its connections with entanglement. First, we provide a sufficient and necessary condition for bipartite pure state transformation under partial incoh…
Quantifying dynamical coherence with coherence measures
Sunho Kim, Chunhe Xiong, Asutosh Kumar +2
Quantum coherence, like entanglement, is a fundamental resource in quantum information. In recent years, remarkable progress has been made in formulating resource theory of coheren…
Characterizing entanglement using quantum discord over state extensions
Chunhe Xiong, Sunho Kim, Daowen Qiu +2
We propose a framework to characterize entanglement with quantum discord, both asymmetric and symmetric, over state extensions. In particular, we show that the minimal Bures distan…
Converting coherence based on positive-operator-valued measures into entanglement
Sunho Kim, Chunhe Xiong, Asutosh Kumar +1
Quantum resource theories provide a diverse and powerful framework for extensively studying the phenomena in quantum physics. Quantum coherence, a quantum resource, is the basic in…
Interrelation between Partial Coherence and Quantum Correlations
Sunho Kim, Longsuo Li, Asutosh Kumar +1
Both coherence and entanglement stem from the superposition principle, capture quantumness of a physical system, and play a central role in quantum physics. In a multipartite quant…
Protocol for unambiguous quantum state discrimination using quantum coherence
Sunho Kim, Longsuo Li, Asutosh Kumar +5
Roa et al. showed that quantum state discrimination between two nonorthogonal quantum states does not require quantum entanglement but quantum dissonance only. We find that quantum…
Characterizing nonclassical correlations via local quantum Fisher information
Sunho Kim, Longsuo Li, Asutosh Kumar +1
We define two ways of quantifying the quantum correlations based on quantum Fisher information (QFI) in order to study the quantum correlations as a resource in quantum metrology.…
Mixed Form of Ambiguous and Unambiguous Discriminations
Sunho Kim, Junde Wu, Minhyung Cho
In this paper, we introduce a mixed form of ambiguous and unambiguous quantum state discriminations, and show that the mixed form has higher success probability than the unambiguou…
Logically reversible measurements: Construction and application
Sunho Kim, Juncheng Wang, Asutosh Kumar +2
We show that for any von Neumann measurement, we can construct a logically reversible measurement such that Shannon entropies and quantum discords induced by the two measurements h…
The Decomposition Properties of Quantum Discord
Sunho Kim, Junde Wu
The quantum discord was introduced by Ollivier, Zurek, Henderson and Vedral as an indicator of the degree of quantumness of mixed states. In this paper, we give out the decompositi…
The Local Orthogonality between Quantum States and Entanglement Decomposition
Sunho Kim, Junde Wu, Lin Zhang +1
In the paper, we show that when a quantum state can be decomposed as a convex combination of locally orthogonal mixed states, its entanglement can be decomposed into the entangleme…