Nonexponential decay of Feshbach molecules
Francesco V. Pepe, Paolo Facchi, Zeinab Kordi, Saverio Pascazio
TL;DR
This paper investigates the decay dynamics of $^6$Li Feshbach molecules near the BCS-BEC crossover, revealing nonexponential decay behaviors and a transition from exponential to stretched-exponential decay regimes.
Contribution
It provides the first detailed analysis of nonexponential decay patterns in Feshbach molecules close to the resonance, highlighting a transition in decay laws.
Findings
Nonexponential decay observed near the resonance
Transition from exponential to stretched-exponential decay
Decay behavior depends on proximity to the resonance
Abstract
We analyze the temporal behavior of the survival probability of an unstable Li Feshbach molecule close to the BCS-BEC crossover. We find different instances of nonexponential decay as the magnetic field approaches the resonance value, at which the molecule becomes stable. We observe a transition from an exponential decay towards a regime dominated by a stretched-exponential law.
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