Nonexponential decay of Feshbach molecules

Abstract

We analyze the temporal behavior of the survival probability of an unstable ${}^6$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.

10 pages, 7 figures

References in corpus (6)

• Many-Body Physics with Ultracold Gases
• Quantum Zeno dynamics: mathematical and physical aspects
• BCS-BEC crossover at finite temperature in the broken-symmetry phase
• Determination of atomic scattering lengths from measurements of molecular binding energies near Feshbach resonances
• Experimental investigation of quantum decay at short, intermediate and long times via integrated photonics
• Positive Hamiltonians can give purely exponential decay

Cited by in corpus (6)

• Analytical Survival Analysis of the Ornstein-Uhlenbeck Process
• Capturing non-exponential dynamics in the presence of two decay channels
• Multichannel decay law
• Spontaneous emission in dispersive media without point-dipole approximation
• Non-exponential decay in Floquet-Bloch bands
• Quantum Corrections to the Decay Law in Flight