Emergence of Topological Fermi Liquid from a Strongly Correlated Bosonic System in Optical Superlattices

Abstract

Recent experiments on quantum degenerate gases give an opportunity for simulating strongly-correlated electronic systems in optical lattices. It may shed light on some long-standing puzzles in condensed-matter physics, like the nature of high-temperature superconductivity in cuprates that had baffled people over two decades. It is believed that the two-dimensional fermionic Hubbard model, or t-J model, contains the key to this problem; but the difficulty of unveiling the mystery of a strongly-interacting fermionic system is also generally acknowledged. Here, as a substitute, we systematically analyze the property of bosonic t-J model simulated in optical superlattices near unit-filling. In particular, we show the emergence of a strange topological Fermi liquid with Fermi surfaces from a purely bosonic system. We also discuss the possibility of observing these phenomena in ultracold atom experiments. The result may provide some crucial insights into the origin of high-T_{c} superconductivity.

9 pages, 5 figures

References in corpus (13)

• Many-Body Physics with Ultracold Gases
• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Theory of ultracold Fermi gases
• Time-resolved Observation and Control of Superexchange Interactions with Ultracold Atoms in Optical Lattices
• Preparation of a quantum state with one molecule at each site of an optical lattice
• Expansion of a quantum gas released from an optical lattice
• Probing spatial spin correlations of ultracold gases by quantum noise spectroscopy
• Magnetism, coherent many-particle dynamics, and relaxation with ultracold bosons in optical superlattices
• Topological Gauge Structure and Phase Diagram for Weakly Doped Antiferromagnets
• Phase diagram of anisotropic boson t-J model
• Holes as Dipoles in a Doped Antiferromagnet and Stripe Instabilities
• Testing of spin ordering Hamiltonian with ultracold atoms in optical lattices
• Emergence of Spin-Half Fermion Vortices and The Vortex Metal