8 papers · 1 filter
On the strong superadditivity of entanglement of formation -- Conditions and examples
Asutosh Kumar
From Shor's [Comm. Math. Phys. 246(3), 453 (2004)] and Hastings's [Nature Phys. 5, 255 (2009)] studies, the strong superadditivity of entanglement of formation is, in general, not…
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…
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…
Quantum Process Randomness
Sreetama Das, Asutosh Kumar, Aditi Sen De +1
We study the optimization of any quantum process by minimizing the "randomness" in the measurement result at the output of that quantum process. We conceptualize and propose a meas…
Partial coherence and quantum correlation with fidelity and affinity distances
Chunhe Xiong, Asutosh Kumar, Minyi Huang +3
A fundamental task in any physical theory is to quantify certain physical quantity in a meaningful way. In this paper we show that both fidelity distance and affinity distance sati…
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…