Publications (17)
Strings in strongly correlated electron systems
P. Fulde, F. Pollmann
It is shown that strongly correlated electrons on frustrated lattices like pyrochlore, checkerboard or kagome lattice can lead to the appearance of closed and open strings. They ar…
Unveiling the S=3/2 Kitaev Honeycomb Spin Liquids
Hui-Ke Jin, W. M. H. Natori, F. Pollmann +1
The S=3/2 Kitaev honeycomb model (KHM) is a quantum spin liquid (QSL) state coupled to a static Z gauge field. Employing an SO(6) Majorana representation of spin 3/2's, we find…
Stark many-body localization
M. Schulz, C. A. Hooley, R. Moessner +1
We consider spinless fermions on a finite one-dimensional lattice, interacting via nearest-neighbor repulsion and subject to a strong electric field. In the non-interacting case, d…
Fractionally charged excitations on frustrated lattices
E. Runge, F. Pollmann, P. Fulde
Systems of strongly correlated fermions on certain geometrically frustrated lattices at particular filling factors support excitations with fractional charges . We calcula…
Ground-state fidelity of the spin-1 Heisenberg chain with single ion anisotropy: quantum renormalization group and exact diagonalization approaches
A. Langari, F. Pollmann, M. Siahatgar
We study the phase diagram of the anisotropic spin-1 Heisenberg chain with single ion anisotropy (D) using a ground-state fidelity approach. The ground-state fidelity and its corre…
Correlated Fermions on a Checkerboard Lattice
F. Pollmann, J. J. Betouras, K. Shtengel +1
A model of strongly correlated spinless fermions hopping on a checkerboard lattice is mapped onto a quantum fully-packed loop model. We identify a large number of fluctuationless s…
Classical correlations of defects in lattices with geometrical frustration in the motion of a particle
F. Pollmann, J. J. Betouras, E. Runge
We map certain highly correlated electron systems on lattices with geometrical frustration in the motion of added particles or holes to the spatial defect-defect correlations of di…
Kinetic ferromagnetism on a kagome lattice
F. Pollmann, P. Fulde, K. Shtengel
We study strongly correlated electrons on a kagome lattice at 1/6 and 1/3 filling. They are described by an extended Hubbard Hamiltonian. We are concerned with the limit |t|<<V<<U…
Topological Magnons in Kitaev Magnets at High Fields
P. A. McClarty, X. -Y. Dong, M. Gohlke +4
We study the Kitaev-Heisenberg-- model that describes the magnetism in strong spin-orbit coupled honeycomb lattice Mott insulators. In strong magnetic fields that…
Probing non-equilibrium topological order on a quantum processor
M. Will, T. A. Cochran, E. Rosenberg +6
Out-of-equilibrium phases in many-body systems constitute a new paradigm in quantum matter - they exhibit dynamical properties that may otherwise be forbidden by equilibrium thermo…
Distinguishing localization from chaos: challenges in finite-size systems
D. A. Abanin, J. H. Bardarson, G. De Tomasi +7
We re-examine attempts to study the many-body localization transition using measures that are physically natural on the ergodic/quantum chaotic regime of the phase diagram. Using s…
A quantum liquid with deconfined fractional excitations in three dimensions
O. Sikora, F. Pollmann, N. Shannon +2
Excitations which carry "fractional" quantum numbers are known to exist in one dimension in polyacetylene, and in two dimensions, in the fractional quantum Hall effect. Fractional…
Charge degrees in the quarter-filled checkerboard lattice
F. Pollmann, J. J. Betouras, E. Runge +1
For a systematic study of charge degrees of freedom in lattices with geometric frustration, we consider spinless fermions on the checkerboard lattice with nearest-neighbor hopping…
Spectral functions for strongly correlated 5f-electrons
F. Pollmann, G. Zwicknagl
We calculate the spectral functions of model systems describing 5f-compounds adopting Cluster Perturbation Theory. The method allows for an accurate treatment of the short-range co…
Realizing topologically ordered states on a quantum processor
K. J. Satzinger, Y. Liu, A. Smith +95
The discovery of topological order has revolutionized the understanding of quantum matter in modern physics and provided the theoretical foundation for many quantum error correctin…
Spectral functions and optical conductivity of spinless fermions on a checkerboard lattice
F. Pollmann, P. Fulde, E. Runge
We study the dynamical properties of spinless fermions on the checkerboard lattice. Our main interest is the limit of large nearest-neighbor repulsion as compared with hopping…
On confined fractional charges: a simple model
F. Pollmann, P. Fulde
We address the question whether features known from quantum chromodynamics (QCD) can possibly also show up in solid-state physics. It is shown that spinless fermions of charge …