Quasiparticle tunneling in a periodically driven bosonic Josephson junction

Abstract

A resonantly driven bosonic Josephson junction supports stable collective excitations, or quasiparticles, which constitute analogs of the Trojan wave packets previously explored with Rydberg atoms in strong microwave fields. We predict a quantum beating effect between such symmetryrelated many-body Trojan states taking place on time scales which are long in comparison with the driving period. Within a mean-field approximation, this quantum beating can be regarded as a manifestation of dynamical tunneling. On the full N-particle level, the beating phenomenon leads to an experimentally feasible, robust strategy for probing highly entangled mesoscopic states.

8 pages, 5 figures

References in corpus (3)

• Differences between mean-field dynamics and N-particle quantum dynamics as a signature of entanglement
• Trojan quasiparticles
• Fluctuations of the order parameter of a mesoscopic Floquet condensate