Dynamical Unbinding Transition in a Periodically Driven Mott Insulator

Abstract

We study the double occupancy in a fermionic Mott insulator at half-filling generated via a dynamical periodic modulation of the hopping amplitude. Tuning the modulation amplitude, we describe a crossover in the nature of doublon-holon excitations from a Fermi Golden Rule regime to damped Rabi oscillations. The decay time of excited states diverges at a critical modulation strength, signaling the transition to a dynamically bound non-equilibrium state of doublon-holon pairs. A setup using a fermionic quantum gas should allow to study the critical exponents.

4 pages, 2 figures

References in corpus (3)

• Repulsively bound atom pairs in an optical lattice
• Dynamically Generated Double Occupancy as a Probe of Cold Atom Systems
• Coherent pumping of a Mott insulator: Fermi golden rule versus Rabi oscillations