Revealing single-trap condensate fragmentation by measuring density-density correlations after time of flight
arXiv:1405.1344 · doi:10.1103/PhysRevLett.113.140404
Abstract
We consider ultracold bosonic atoms in a single trap in the Thomas-Fermi regime, forming many-body states corresponding to stable macroscopically fragmented two-mode condensates. It is demonstrated that upon free expansion of the gas, the spatial dependence of the density-density correlations at late times provides a unique signature of fragmentation. This hallmark of fragmented condensate many-body states in a single trap is due to the fact that time of flight modifies the correlation signal such that two opposite %with respect to points in the expanding cloud become uncorrelated, in distinction to a nonfragmented Bose-Einstein condensate, where they remain correlated.
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References in corpus (10)
- Spatial quantum noise interferometry in expanding ultracold atom clouds
- Fragmentation of Bose-Einstein Condensates
- Interference of an array of independent Bose-Einstein condensates
- General variational many-body theory with complete self-consistency for trapped bosonic systems
- Fragmented many-body ground states for scalar bosons in a single trap
- Phase coherence and fragmentation in weakly interacting bosonic gases
- Emergence of a new pair-coherent phase in many-body quenches of repulsive bosons
- The absence of fragmentation in Bose-Einstein condensates
- Counting statistics of interfering Bose-Einstein condensates
- Stability of spherically trapped three-dimensional Bose-Einstein condensates against macroscopic fragmentation
Cited by in corpus (5)
- Condensate fragmentation as a sensitive measure of the quantum many-body behavior of bosons with long-range interactions
- Breaking the resilience of a two-dimensional Bose-Einstein condensate to fragmentation
- Bogoliubov depletion of the fragmented condensate in the bosonic flux ladder
- Many-body excitations and de-excitations in trapped ultracold bosonic clouds
- Contact and Structure Factor for Bosonic and Fermionic Mixtures