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Operator Valued Flow Equation Approach to the Bosonic Lattice Polaron: Dispersion Renormalization Beyond the Fröhlich Paradigm
Jan-Philipp Christ, Pit Bermes, Fabian Grusdt
We consider the ground state properties of a lattice Bose polaron, a quasiparticle arising from the interaction between an impurity confined to an optical lattice and a surrounding…
Observation of emergent scaling of spin-charge correlations at the onset of the pseudogap
Thomas Chalopin, Petar Bojović, Si Wang +12
In strongly correlated materials, interacting electrons are entangled and form collective quantum states, resulting in rich low-temperature phase diagrams. Notable examples include…
Geometric orthogonal metals: Hidden antiferromagnetism and pseudogap from fluctuating stripes
Henning Schlömer, Annabelle Bohrdt, Fabian Grusdt
One of the key features of hole-doped cuprates is the presence of an extended pseudogap phase, whose microscopic origin has been the subject of intense investigation since its disc…
Microscopy of bosonic charge carriers in staggered magnetic fields
Annabelle Bohrdt, David Wei, Daniel Adler +6
The interplay of spin and charge degrees of freedom is believed to underlie various unresolved phenomena in strongly correlated systems. Quantum simulators based on neutral atoms p…
Impurities and polarons in bosonic quantum gases: a review on recent progress
F. Grusdt, N. Mostaan, E. Demler +1
This review describes the field of Bose polarons, arising when mobile impurities are immersed into a bosonic quantum gas. The latter can be realized by a Bose-Einstein condensate (…
Kinetic magnetism and stripe order in the antiferromagnetic bosonic model
Timothy J. Harris, Ulrich Schollwöck, Annabelle Bohrdt +1
Unraveling the microscopic mechanisms governing the physics of doped quantum magnets is key to advancing our understanding of strongly correlated quantum matter. Quantum simulation…
Two-dopant origin of competing stripe and pair formation in Hubbard and - models
Tizian Blatz, Ulrich Schollwöck, Fabian Grusdt +1
Understanding the physics of the two-dimensional Hubbard model is widely believed to be a key step in achieving a full understanding of high- cuprate superconductors.…
Absence of gapless Majorana edge modes in few-leg bosonic flux ladders
Felix A. Palm, Cécile Repellin, Nathan Goldman +1
The search for Majorana excitations has seen tremendous efforts in recent years, ultimately aiming for their individual controllability in future topological quantum computers. A p…
Probing a Modified Luttinger Sum Rule in the Strongly Interacting 1D Fermi-Hubbard Model
Annika Böhler, Henning Schlömer, Ulrich Schollwöck +2
Fermi surface reconstruction in cuprates can lead to an abrupt change in the Fermi momentum between different phases. This phenomenon remains subject of debate and is at the…
Percolation renormalization group analysis of confinement in lattice gauge theories
Gesa Dünnweber, Simon M. Linsel, Annabelle Bohrdt +1
The analytical study of confinement in lattice gauge theories (LGTs) remains a difficult task to this day. Taking a geometric perspective on confinement, we develop a real-space re…
Spectroscopy of Hubbard-Mott excitons and their ro-vibrational excitations
Annabelle Bohrdt, Eugene Demler, Fabian Grusdt
Hubbard excitons are bound states of doublons and holes that can be experimentally probed both in real materials, such as cuprates, and in cold atom quantum simulators. Here we com…
Emergent spinon-holon Feshbach resonance in a doped Majumdar-Ghosh model
Simon M. Linsel, Ulrich Schollwöck, Annabelle Bohrdt +1
Experimental and numerical spectroscopy have revealed rich physics in antiferromagnets, in particular in frustrated and doped systems. The Majumdar-Ghosh (MG) model has an analytic…
Local control and mixed dimensions: Exploring high-temperature superconductivity in optical lattices
Henning Schlömer, Hannah Lange, Titus Franz +7
The simulation of high-temperature superconducting materials by implementing strongly correlated fermionic models in optical lattices is one of the major objectives in the field of…
Neural Network Quantum States for the Interacting Hofstadter Model with Higher Local Occupations and Long-Range Interactions
Fabian Döschl, Felix A. Palm, Hannah Lange +2
Due to their immense representative power, neural network quantum states (NQS) have gained significant interest in current research. In recent advances in the field of NQS, it has…
Implementation of the bilayer Hubbard model in a moiré heterostructure
Borislav Polovnikov, Johannes Scherzer, Subhradeep Misra +14
Moiré materials provide a unique platform for studies of correlated many-body physics of the Fermi-Hubbard model on triangular spin-charge lattices. Bilayer Hubbard models are of p…
Mean-field theory of 1+1D lattice gauge theory with matter
Matjaž Kebrič, Ulrich Schollwöck, Fabian Grusdt
Lattice gauge theories (LGTs) provide valuable insights into problems in strongly correlated many-body systems. Confinement which arises when matter is coupled to gauge fields is j…
Magnetic polarons beyond linear spin-wave theory: Mesons dressed by magnons
Pit Bermes, Annabelle Bohrdt, Fabian Grusdt
When a mobile hole is doped into an antiferromagnet, its movement will distort the surrounding magnetic order and yield a magnetic polaron. The resulting complex interplay of spin…
Percolation as a confinement order parameter in lattice gauge theories
Simon M. Linsel, Annabelle Bohrdt, Lukas Homeier +2
Lattice gauge theories (LGTs) were introduced in 1974 by Wilson to study quark confinement. These models have been shown to exhibit (de-)confined phases, yet it remains challenging…