期刊
PHYSICAL REVIEW A
卷 96, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.96.063601
关键词
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资金
- Canada Foundation for Innovation under Compute Canada
- Government of Ontario, Ontario Research Fund - Research Excellence
- University of Toronto
- NSERC
- CIFAR
- US National Science Foundation [PHY-1306638, PHY-1207881, PHY-1520915, OAC-1740130]
- US Air Force Office of Scientific Research Grant [FA9550-14-1-0287]
- China Scholarship Council
- Northrop Grumman Aerospace Systems
- National Science Foundation [PHY-1607611]
- Direct For Mathematical & Physical Scien
- Division Of Physics [1306638] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1520915] Funding Source: National Science Foundation
Recent experiments on macroscopic quantum tunneling reveal a nonexponential decay of the number of atoms trapped in a quasibound state behind a potential barrier. Through both experiment and theory, we demonstrate this nonexponential decay results from interactions between atoms. Quantum tunneling of tens of thousands of Rb-87 atoms in a Bose-Einstein condensate is modeled by a modified Jeffreys-Wentzel-Kramers-Brillouin model, taking into account the effective time-dependent barrier induced by the mean field. Three-dimensional Gross-Pitaevskii simulations corroborate a mean-field result when compared with experiments. However, with one-dimensional modeling using time-evolving block decimation, we present an effective renormalized mean-field theory that suggests many-body dynamics for which a bare mean-field theory may not apply.
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