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Springer series in optical sciences/SPringer series in optical sciences

Atom-Field Interaction Hamiltonians

Ravinder Rupchand Puri

Published Jan 1, 2001• 0 citations
Publisher
DOI
10.1007/978-3-540-44953-9_7

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We study the Jaynes-Cummings interaction when initial mixed states, for the atom or the field, are considered. The evolved mixed field density matrix is purified to a wavefunction that describes the interaction between a quantised field and an artificial four-level atom. This allows us to use the Araki-Lieb inequality to calculate the field entropy from the atomic entropy. We then generate {\it artificial} Hamiltonians that reproduce the field entropy dynamics. We finally show that more realistic Hamiltonians may be considered by using two entangled two-level atoms.