Tesis y Trabajos de Investigación PUCP

URI permanente para esta comunidadhttp://54.81.141.168/handle/123456789/6

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Autorsearch.filters.applied.operator.equals: search.filters.author.Montenegro La Torre, Carlos Renzo Misael

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    Constraints between concurrence and polarization for mixed states subjected to open system dynamics
    (Pontificia Universidad Católica del Perú, 2023-05-24) Montenegro La Torre, Carlos Renzo Misael; De Zela Martinez, Francisco Antonio
    Entanglement and polarization are mutually constrained by the relationship C2 + P2 = 1, which engages concurrence (C) of a pure, two-qubit state and the degree of polarization (P) of either of its two subsystems. How the above constraint generalizes for mixed states, is an open question. We address mixed, two-qubit states of the X type, i.e., those whose density matrix has nonzero elements only in the two main diagonals. We focus on mixed states that arise out of a pure, two-qubit state that is subjected to either the amplitude damping channel or the depolarizing channel. We derive alternative constraints for concurrence and polarization and test them experimentally with polarization-entangled photons. We argue that our theoretical results hold also for classical light, whenever two binary degrees of freedom can be entangled.