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Realizing multi-orbital Emery models with ultracold atoms
Conall McCabe, Jamie Boyd, Kaizhao Wang +5
Strongly-correlated electrons in transition-metal oxides give rise to intriguing emergent phenomena, including high-temperature superconductivity in cuprates. While simplified one-…
Pseudogap in a Fermi-Hubbard quantum simulator
Lev Haldar Kendrick, Anant Kale, Youqi Gang +4
Understanding doped Mott insulators is a fundamental goal in condensed matter physics, with relevance to cuprate superconductors and other quantum materials. The doped Hubbard mode…
Optimized Gutzwiller Projected States for Doped Antiferromagnets in Fermi-Hubbard Simulators
Christian Reinmoser, Muqing Xu, Lev Haldar Kendrick +6
In quantum many-body physics, one aims to understand emergent phenomena and effects of strong interactions, ideally by developing a simple theoretical picture. Recently, progress i…
A neutral-atom Hubbard quantum simulator in the cryogenic regime
Muqing Xu, Lev Haldar Kendrick, Anant Kale +6
Ultracold fermionic atoms in optical lattices offer pristine realizations of Hubbard models, which are fundamental to modern condensed matter physics. Despite significant advanceme…
Ferrimagnetism of ultracold fermions in a multi-band Hubbard system
Martin Lebrat, Anant Kale, Lev Haldar Kendrick +6
Strongly correlated materials feature multiple electronic orbitals which are crucial to accurately understand their many-body properties, from cuprate materials to twisted bilayer…
Observation of Nagaoka Polarons in a Fermi-Hubbard Quantum Simulator
Martin Lebrat, Muqing Xu, Lev Haldar Kendrick +7
Quantum interference can deeply alter the nature of many-body phases of matter. In the paradigmatic case of the Hubbard model, Nagaoka famously proved that introducing a single iti…
Frustration- and doping-induced magnetism in a Fermi-Hubbard simulator
Muqing Xu, Lev Haldar Kendrick, Anant Kale +5
Geometrical frustration in strongly correlated systems can give rise to a plethora of novel ordered states and intriguing magnetic phases, such as quantum spin liquids. Promising c…
Schrieffer-Wolff Transformations for Experiments: Dynamically Suppressing Virtual Doublon-Hole Excitations in a Fermi-Hubbard Simulator
Anant Kale, Jakob Hendrik Huhn, Muqing Xu +7
In strongly interacting systems with a separation of energy scales, low-energy effective Hamiltonians help provide insights into the relevant physics at low temperatures. The emerg…
Interaction-Assisted Reversal of Thermopower with Ultracold Atoms
Samuel Häusler, Philipp Fabritius, Jeffrey Mohan +3
We study thermoelectric currents of neutral, fermionic atoms flowing through a mesoscopic channel connecting a hot and a cold reservoir across the superfluid transition. The thermo…
Coupling a mobile hole to an antiferromagnetic spin background: Transient dynamics of a magnetic polaron
Geoffrey Ji, Muqing Xu, Lev Haldar Kendrick +8
Understanding the interplay between charge and spin and its effects on transport is a ubiquitous challenge in quantum many-body systems. In the Fermi-Hubbard model, this interplay…
Spin transport in a one-dimensional quantum wire
A. -M. Visuri, M. Lebrat, S. Häusler +2
We analyze the spin transport through a finite-size one-dimensional interacting wire connected to noninteracting leads. By combining renormalization-group arguments with other anal…
Quantized conductance through a dissipative atomic point contact
Laura Corman, Philipp Fabritius, Samuel Häusler +5
Signatures of quantum transport are expected to quickly vanish as dissipation is introduced in a system. This dissipation can take several forms, including that of particle loss, w…
Quantized conductance through a spin-selective atomic point contact
Martin Lebrat, Samuel Häusler, Philipp Fabritius +3
We implement a microscopic spin filter for cold fermionic atoms in a quantum point contact (QPC) and create fully spin-polarized currents while retaining conductance quantization.…
Breakdown of the Wiedemann-Franz law in a unitary Fermi gas
Dominik Husmann, Martin Lebrat, Samuel Häusler +3
We report on coupled heat and particle transport measurements through a quantum point contact (QPC) connecting two reservoirs of resonantly interacting, finite temperature Fermi ga…
Band and correlated insulators of cold fermions in a mesoscopic lattice
Martin Lebrat, Pjotrs Grišins, Dominik Husmann +5
We investigate the transport properties of neutral, fermionic atoms passing through a one-dimensional quantum wire containing a mesoscopic lattice. The lattice is realized by proje…
A scanning gate microscope for cold atomic gases
Samuel Häusler, Shuta Nakajima, Martin Lebrat +4
We present a scanning probe microscopy technique for spatially resolving transport in cold atomic gases, in close analogy with scanning gate microscopy in semiconductor physics. Th…
Mapping out spin and particle conductances in a quantum point contact
Sebastian Krinner, Martin Lebrat, Dominik Husmann +3
We study particle and spin transport in a single mode quantum point contact using a charge neutral, quantum degenerate Fermi gas with tunable, attractive interactions. This yields…
Connecting strongly correlated superfluids by a quantum point contact
Dominik Husmann, Shun Uchino, Sebastian Krinner +4
Point contacts provide simple connections between macroscopic particle reservoirs. In electric circuits, strong links between metals, semiconductors or superconductors have applica…
Experimental realisation of the topological Haldane model
Gregor Jotzu, Michael Messer, Rémi Desbuquois +4
The Haldane model on the honeycomb lattice is a paradigmatic example of a Hamiltonian featuring topologically distinct phases of matter. It describes a mechanism through which a qu…
Observation of Quantized Conductance in Neutral Matter
Sebastian Krinner, David Stadler, Dominik Husmann +2
In transport experiments the quantum nature of matter becomes directly evident when changes in conductance occur only in discrete steps, with a size determined solely by Planck's c…