Chiral d-Wave Superfluid in Periodically Driven Lattices.

Area of Science:

• Condensed Matter Physics
• Quantum Matter
• Topological Matter

Background:

• Chiral d-wave superfluids are a theoretical example of interacting topological matter.
• Their experimental realization is challenging due to the requirement of strong d-wave interactions, not found in ordinary systems.
• No experimental observation of unconventional superfluids like chiral d-wave superfluids currently exists.

Purpose of the Study:

• To present a novel principle for creating a two-dimensional (2D) chiral d-wave superfluid.
• To overcome the experimental difficulties in observing unconventional superfluids.
• To provide a viable scheme for current experimental setups.

Main Methods:

• Utilizing periodically driven lattices.
• Imprinting a 2D pseudospin-orbit coupling, where sublattice index acts as pseudospin.
• Leveraging s-wave interactions between two hyperfine spin states.

Main Results:

• A new principle for generating a 2D chiral d-wave superfluid was demonstrated.
• The proposed method naturally creates the chiral d-wave superfluidity.
• The scheme is directly implementable in existing experimental platforms.

Conclusions:

• The study presents a practical method for creating elusive chiral d-wave superfluids.
• This work opens avenues for experimental observation and study of topological matter.
• The proposed technique using driven lattices and engineered interactions is feasible with current technology.