English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Quantum simulation of expanding space-time with tunnel-coupled condensates

MPS-Authors
There are no MPG-Authors in the publication available
External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
Supplementary Material (public)

2015_Neuenhahn.png
(Supplementary material), 68KB

Citation

Neuenhahn, C., & Marquardt, F. (2015). Quantum simulation of expanding space-time with tunnel-coupled condensates. New Journal of Physics, 17: 125007. doi:10.1088/1367-2630/17/12/125007.


Cite as: https://hdl.handle.net/21.11116/0000-0001-BBFC-1
Abstract
We consider two weakly interacting quasi-1D condensates of cold bosonic atoms. It turns out that a time-dependent variation of the tunnel-coupling between those condensates is equivalent to the spatial expansion of a one-dimensional toy-Universe, with regard to the dynamics of the relative phase field. The dynamics of this field is governed by the quantum sine-Gordon equation. Thus, this analogy could be used to 'quantum simulate' the dynamics of a scalar, interacting quantum field on an expanding background. We discuss how to observe the 'freezing' of quantum fluctuations during an accelerating expansion in a possible experiment. We also analyze an experimental protocol to study the formation of sine-Gordon breathers in the relative phase field, seeded by quantum