A simple model of quantum trajectories
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- 13 June 2002
- journal article
- Published by American Association of Physics Teachers (AAPT) in American Journal of Physics
- Vol. 70 (7) , 719-737
- https://doi.org/10.1119/1.1475328
Abstract
Quantum trajectory theory, developed largely in the quantum optics community to describe open quantum systems subjected to continuous monitoring, has applications in many areas of quantum physics. I present a simple model, using two-level quantum systems (q-bits), to illustrate the essential physics of quantum trajectories and how different monitoring schemes correspond to different “unravelings” of a mixed state master equation. I also comment briefly on the relationship of the theory to the consistent histories formalism and to spontaneous collapse models.Keywords
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