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The loss of quantum coherence induced by a Gaussian random potential |
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| Authors: | S. Boonpan B. Panacharoensawad S. Boonchui |
| Affiliation: | 1. Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand;2. Department of Physics, Faculty of Science, Naresuan University, Phitsanulok 65000, Thailand;3. Center of Excellence in Forum for Theoretical Science, Chulalongkorn University, Bangkok 10330, Thailand |
| Abstract: | We investigate the source of decoherence from a random external potential by the Feynman path integral method. We find that the off-diagonal elements of the density matrix decay with two characteristic time scales, which are separated by the correlation length. The heavy and light mass cases are demonstrated. |
| Keywords: | Gaussian random potential Feynman path integral method Decoherence |
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