Spatial Pauli-blocking of spontaneous emission in optical lattices

TL;DR

This paper explores how Pauli exclusion can suppress spontaneous emission in optical lattices, with potential applications in reservoir engineering and many-body state preparation.

Contribution

It introduces a setup for observing Pauli-blocked spontaneous emission in optical lattices with different atomic species and decay rates.

Findings

Suppression of spontaneous emission due to Pauli exclusion.

Feasibility demonstrated for alkali and alkaline earth-like atoms.

Potential for reservoir engineering and dissipative state control.

Abstract

Spontaneous emission by an excited fermionic atom can be suppressed due to the Pauli exclusion principle if the relevant final states after the decay are already occupied by identical atoms in the ground state. Here we discuss a setup where a single atom is prepared in the first excited state on a single site of an optical lattice under conditions of very tight trapping. We investigate these phenomena in the context of two experimental realizations: (1) with alkali atoms, where the decay rate of the excited state is large and (2) with alkaline earth-like atoms, where the decay rate from metastable states can be tuned in experiments. This phenomenon has potential applications towards reservoir engineering and dissipative many-body state preparation in an optical lattice.