Phys. Rev. Lett. 80, 2969–2971 (1998)Searching for Evolutions of Pure States into Mixed States in the Two-State System K0K̅ 0Received 30 April 1997; published in the issue dated 6 April 1998 Oscillations between two quantum states may be a sensitive probe for a loss of quantum coherence due to possible violations of quantum mechanics, e.g., caused by gravitation. We show, for the strangeness oscillations in the neutral kaon system, that there exist four experiments which uniquely determine all nine non-quantum-mechanical parameters that occur in a density matrix description using the Pauli matrix basis. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.80.2969
DOI:
10.1103/PhysRevLett.80.2969
PACS:
03.65.Bz, 11.30.Er, 13.20.Eb
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