Journal
PHYSICAL REVIEW LETTERS
Volume 112, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.070404
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- NIST
- NSF-PIF
- ARO
- ARO-DARPA-OLE
- AFOSR
- NRC
- NDSEG
- NSF
- NCAR
- CU
- [JILA-NSF-PFC-1125844]
- Direct For Mathematical & Physical Scien
- Division Of Physics [1211914] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [1125844] Funding Source: National Science Foundation
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We investigate theoretically the suppression of two-body losses when the on-site loss rate is larger than all other energy scales in a lattice. This work quantitatively explains the recently observed suppression of chemical reactions between two rotational states of fermionic KRb molecules confined in one-dimensional tubes with a weak lattice along the tubes [Yan et al., Nature (London) 501, 521 (2013)]. New loss rate measurements performed for different lattice parameters but under controlled initial conditions allow us to show that the loss suppression is a consequence of the combined effects of lattice confinement and the continuous quantum Zeno effect. A key finding, relevant for generic strongly reactive systems, is that while a single-band theory can qualitatively describe the data, a quantitative analysis must include multiband effects. Accounting for these effects reduces the inferred molecule filling fraction by a factor of 5. A rate equation can describe much of the data, but to properly reproduce the loss dynamics with a fixed filling fraction for all lattice parameters we develop a mean-field model and benchmark it with numerically exact time-dependent density matrix renormalization group calculations.
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