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quant-ph2020★ 2 cited
Von Neumann entropy in a dispersive cavity
Ram Narayan Deb
We study the von Neumann entropy of the partial trace of a system of two two-level atoms (qubits) in a dispersive cavity where the atoms are interacting collectively with a single…
quant-ph2020
Von Neumann Entropy from Mean Spin Vector
Ram Narayan Deb
We show for a general pure entangled state of two two-level atoms, the von Neumann entropy of the partial traces can be directly measured from the magnitude of the mean spin vector…
quant-ph2020
Measure of tripartite quantum correlation in multiqubit symmetric pure state
Ram Narayan Deb
We propose a direct measure of tripartite quantum correlation in an arbitrary symmetric pure state of N correlated two-level atoms (qubits). We compute the third order moments of t…