9,251 research outputs found
Heralded Entanglement of Arbitrary Degree in Remote Qubits
Incoherent scattering of photons off two remote atoms with a Lambda-level
structure is used as a basic Young-type interferometer to herald long-lived
entanglement of an arbitrary degree. The degree of entanglement, as measured by
the concurrence, is found to be tunable by two easily accessible experimental
parameters. Fixing one of them to certain values unveils an analog to the
Malus' law. An estimate of the variation in the degree of entanglement due to
uncertainties in an experimental realization is given.Comment: published version, 4 pages and 2 figure
Time, Judgment, and Competitive Spirituality: A Reading of the Development of the Doctrine of Purgatory
Why has purgatory virtually disappeared front Catholic belief and practice since Vatican II? A competitive spirituality, gravitating around the religious vocation of ascetics from the late Middle Ages, enabled the doctrine by extending the temporal horizon within which God\u27s favorable judgment could be secured, first, in the lifelong practice of ascetics in their spiritual competition with martyrs, and then into a supernatural time required for laypersons and ascetics who could not meet the standard set by saintly ascetics. The loss of this competitive spirituality after Vatican II led to the loss of belief in purgatory and devotional practice surrounding it
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