Super-quantum correlation for SU(2) invariant state in $$4\otimes 2$$4ź2 system
Periodicals(2018)
摘要
AbstractWe analytically evaluate the weak one-way deficit and super-quantum discord for a system composed of spin-3/2 and spin-1/2 subsystems possessing SU(2) symmetry. We also make a comparative study of the relationships among the quantum discord, one-way deficit, weak one-way deficit, and super-quantum discord for the SU(2) invariant state. It is shown that super-quantum discord via weak measurement is greater than that via von Neumann measurement. But weak one-way deficit is less than the one-way deficit. As a result, weak measurement do not always reveal more quantumness.
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关键词
Weak measurement,Weak one-way deficit,Super-quantum discord,SU (2) invariant state
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