Pearl of Kuwait Pearl of Kuwait The Pearl of Kuwait is a pearl that was bought in 2004 by its current owners, Bond Street, London jewellers Symbolic & Chase, and named the "Pearl of Kuwait" in recognition of the Persian Gulf waters in which many pearls have been found. It measures 258.12 grains (64.5 carats, 69.8 carats with its diamond cap) making it the third-largest (documented) well-formed natural pearl drop. In 2004, a large pearl named the Pearl of Kuwait was consigned by an undisclosed private family for auction at Christie's in London. The Pearl of Kuwait was part of the Pearls exhibition
Purity (quantum mechanics) measured system was prepared for leading to such a result. Purity (quantum mechanics) In quantum mechanics, and especially quantum information theory, the purity of a normalized quantum state is a scalar defined as where formula_2 is the density matrix of the state. The purity defines a measure on quantum states, giving information on how much a state is mixed. The purity of a normalized quantum state satisfies formula_3, where formula_4 is the dimension of the Hilbert space upon which the state is defined. The upper bound is obtained by formula_5and formula_6(see trace). If formula_2 is a projection, which describe a