Nonexponential decay of Feshbach molecules

Year: 2020

Authors: Pepe FV., Facchi P., Kordi Z., Pascazio S.

Autors Affiliation: Univ Bari, Dipartimento Fis, I-70126 Bari, Italy; Univ Bari, MECENAS, I-70126 Bari, Italy; INFN, Sez Bari, I-70126 Bari, Italy; Abdus Salam Int Ctr Theoret Phys, I-34151 Trieste, Italy; CNR, Ist Nazl Ott, I-50125 Florence, Italy.

Abstract: We analyze the temporal behavior of the survival probability of an unstable Li-6 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.

Journal/Review: PHYSICAL REVIEW A

Volume: 101 (1)      Pages from: 13632-1  to: 13632-10

More Information: P.F. and S.P. were partially supported by Istituto Nazionale di Fisica Nucleare (INFN) through the project QUANTUM. F.V.P. was supported by INFN through the project PICS. P.F. was partially supported by the Italian National Group of Mathematical Physics of Istituto Nazionale di Alta Matematica (GNFM-INdAM). Z.K. thanks the Abdus Salam ICTP for their financial support through a TRIL Fellowship. Z.K. would also like to thank INFN, Bari, for the hospitality. P.F., F.V.P. and S.P. acknowledge support by MIUR via PRIN 2017 (Progetto di Ricerca di Interesse Nazionale), project QUSHIP (2017SRNBRK). F.V.P. acknowledges support by MIUR through PON ARS 01_00141 CLOSE.
KeyWords: Quantum Zeno; Resonances; Law
DOI: 10.1103/PhysRevA.101.013632

Citations: 7
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