Exciting a d-density wave in an optical lattice with driven tunneling

TL;DR

This paper proposes a feasible method to generate a d_{x^2-y^2}-symmetry quantum state in a 2D bosonic optical lattice using driven tunneling via stimulated Raman scattering, enabling exploration of unconventional quantum phases.

Contribution

It introduces a realistic experimental scheme to produce a d-wave symmetry quantum state in optical lattices through driven tunneling, expanding possibilities for studying complex quantum phases.

Findings

Proposes driven tunneling via Raman scattering to create d-wave symmetry states.

Describes a stationary quantum state with alternating rotational flux in a square lattice.

Suggests applicability to other lattice geometries.

Abstract

Quantum phases with unusual symmetries may play a key role for the understanding of solid state systems at low temperatures. We propose a realistic scenario, well in reach of present experimental techniques, which should permit to produce a stationary quantum state with $d_{x^2-y^2}$-symmetry in a two-dimensional bosonic optical square lattice. This state, characterized by alternating rotational flux in each plaquette, arises from driven tunneling implemented by a stimulated Raman scattering process. We discuss bosons in a square lattice, however, more complex systems involving other lattice geometries appear possible.