| Issue |
EPL
Volume 115, Number 5, September 2016
|
|
|---|---|---|
| Article Number | 50003 | |
| Number of page(s) | 4 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/115/50003 | |
| Published online | 05 October 2016 | |
Decoherence in quantum systems in a static gravitational field
1 Department of Physics, Alzahra University - Tehran 19938-91167, Iran
2 Department of Physics, Isfahan University of Technology - Isfahan 84156-83111, Iran
(a) shariati@mailaps.org
(b) mamwad@mailaps.org
(c) loran@cc.iut.ac.ir
Received: 11 May 2016
Accepted: 15 September 2016
A small quantum system is studied which is a superposition of states localized in different positions in a static gravitational field. The time evolution of the correlation between different positions is investigated, and it is seen that there are two time scales for such an evolution (decoherence). Both time scales are inversely proportional to the red shift difference between the two points. These time scales correspond to decoherences which are linear and quadratic, respectively, in time.
PACS: 03.65.-w – Quantum mechanics / 03.65.Ud – Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)
© EPLA, 2016
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