Stimulated-Raman-adiabatic-passage–like transitions in a harmonically modulated optical lattice

Abstract

We introduce a method for the coherent acceleration of atoms trapped in an optical lattice, using the well-known model for stimulated Raman adiabatic passage (STIRAP). Specifically, we show that small harmonic modulations of the optical lattice amplitude, with frequencies tuned to the eigenvalue spacings of three "unperturbed" eigenstates, reveals a threestate STIRAP subsystem. We use this model to realize an experimentally achievable method for transferring trapped atoms from stationary to motional eigenstates.

Shaken not stirred: creating exotic angular momentum states by shaking an optical lattice

“…Engineering quantum states in higher bands is therefore of great interest and several techniques have been developed to manipulate the state of atoms in an optical lattice [13]. One example of this is periodic modulation of the lattice amplitudes in order to induce controlled transitions to higher orbital states [23] or transitions to motional eigenstates [24]. Higher orbitals have also been populated by stimulated Raman transitions [19].…”

Two-dimensional atom localization and formation of waveguide channels using Bragg diffraction law

“…Initially, coherent population trapping (CPT) was exploited for this purpose [1,17]. The mechanisms of Electromagnetically Induced Transparency (EIT) [18,19] and Stimulated Raman Adiabatic Passage (SRAP) [20,21] were also considered to localize an atom in one dimension. The process of atom localization is mainly controlled by phase coherence [22,23].…”