Decoherence dynamics of measurement-induced nonlocality and comparison with geometric discord for two qubit systems

Authors:
Ajoy Sen;Debasis Sarkar;Amit Bhar
Affiliations:
Department of Applied Mathematics, University of Calcutta, Kolkata, India 700009;Department of Applied Mathematics, University of Calcutta, Kolkata, India 700009;Department of Mathematics, Jogesh Chandra Chaudhuri College, Kolkata, India 700033
Venue:
Quantum Information Processing
Year:
2013

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Abstract

We check the decoherence dynamics of Measurement-induced Nonlocality (in short, MIN) and compare it with geometric discord for two qubit systems. There are quantum states, on which the action of dephasing channel cannot destroy MIN in finite or infinite time. We check the additive dynamics of MIN on a qubit state under two independent noise. Geometric discord also follows such additive dynamics like quantum discord. We have further compared non-Markovian evolution of MIN and geometric discord under dephasing and amplitude damping noise for pure state and it shows distinct differences between their dynamics.