Solitons and Spin-Charge Correlations in Strongly Interacting Fermi Gases

          @misc{ pirsa_PIRSA:16080036,
            doi = {10.48660/16080036},
            url = {https://pirsa.org/16080036},
            author = {Zwierlein, Martin},
            keywords = {Condensed Matter, Quantum Fields and Strings},
            language = {en},
            title = {Solitons and Spin-Charge Correlations in Strongly Interacting Fermi Gases},
            publisher = {Perimeter Institute},
            year = {2016},
            month = {aug},
            note = {PIRSA:16080036 see, \url{https://pirsa.org}}
          }
          

Abstract

Ultracold atomic Fermi gases near Feshbach resonances or in optical lattices realize paradigmatic, strongly interacting forms of fermionic matter. Topological excitations and spin-charge correlations can be directly imaged in real time. In resonant fermionic superfluids, we observe the cascade of solitonic excitations following a pi phase imprint. A planar soliton decays, via the snake instability, into vortex rings and long-lived solitonic vortices. For fermions in optical lattices, realizing the Fermi-Hubbard model, we detect charge and antiferromagnetic spin correlations with single-site resolution. At low fillings, the Pauli and correlation hole is directly revealed. In the Mott insulating state, we observe strong doublon-hole correlations, which should play an important role for transport.