Two perspectives on a decohering spin

Details Two perspectives on a decohering spin Two perspectives on a decohering spin

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992tam..work.....a&link_type=abstract

Presented at the Workshop on Time Asymmetry, Mazagon (Spain), 30 Sep. - 4 Oct. 1991

Mathematics

Probability

Cosmology, Probability Theory, Quantum Mechanics, Schroedinger Equation, Wave Functions, Matrices (Mathematics), Spin, Universe

Scientific paper

The quantum mechanics of a spin interacting with an environment are studied. Although the evolution of the whole system is unitary, the spin evolution is not. The system is chosen so that the spin exhibits loss of quantum coherence, or 'wavefunction collapse', of the sort usually associated with a quantum measurement. The system is analyzed from the point of view of the spin density matrix (or 'Schmidt path'), and also using the consistent histories (or decoherence functional) approach.

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