175 citations · 610 across the 15 of their papers we have counts for
15 papers
Digital programming of spin correlations in a fermionic lattice quantum simulator
Yann Kiefer, Lars Fischer, Zijie Zhu +2
Analog quantum simulation provides a highly controlled platform to study diverse quantum many-body phenomena. However, current methods for state initialisation are limited to therm…
Protected quantum gates using qubit doublons in dynamical optical lattices
Yann Kiefer, Zijie Zhu, Lars Fischer +5
Quantum computing represents a central challenge in modern science. Neutral atoms in optical lattices have emerged as a leading computing platform, with collisional gates offering…
Mitigating higher-band heating in Floquet-Hubbard lattices via two-tone driving
Yuanning Chen, Zijie Zhu, Konrad Viebahn
Multi-photon resonances to high-lying energy levels represent an unavoidable source of Floquet heating in strongly driven quantum systems. In this work, we extend the recently deve…
Splitting and connecting singlets in atomic quantum circuits
Zijie Zhu, Yann Kiefer, Samuel Jele +4
Gate operations composed in quantum circuits form the basis for digital quantum simulation and quantum processing. While two-qubit gates generally operate on nearest neighbours, ma…
Interactions enable Thouless pumping in a nonsliding lattice
Konrad Viebahn, Anne-Sophie Walter, Eric Bertok +5
A topological 'Thouless' pump represents the quantised motion of particles in response to a slow, cyclic modulation of external control parameters. The Thouless pump, like the quan…
Topological Floquet engineering using two frequencies in two dimensions
Yixiao Wang, Anne-Sophie Walter, Gregor Jotzu +1
Using two-frequency driving in two dimensions opens up new possibilites for Floquet engineering, which range from controlling specific symmetries to tuning the properties of resona…
An accordion superlattice for controlling atom separation in optical potentials
Simon Wili, Tilman Esslinger, Konrad Viebahn
We propose a method for separating trapped atoms in optical lattices by large distances. The key idea is the cyclic transfer of atoms between two lattices of variable spacing, know…
Reversal of quantised Hall drifts at non-interacting and interacting topological boundaries
Zijie Zhu, Marius Gächter, Anne-Sophie Walter +2
The transport properties of gapless edge modes at boundaries between topologically distinct domains are of fundamental and technological importance. Therefore, it is crucial to gai…
Quantisation and its breakdown in a Hubbard-Thouless pump
Anne-Sophie Walter, Zijie Zhu, Marius Gächter +5
Geometric properties of waves and wave functions can explain the appearance of integer-valued observables throughout physics. For example, these 'topological' invariants describe t…
Topological pumping in a Floquet-Bloch band
Joaquín Minguzzi, Zijie Zhu, Kilian Sandholzer +3
Constructing new topological materials is of vital interest for the development of robust quantum applications. However, engineering such materials often causes technological overh…
Floquet engineering of individual band gaps in an optical lattice using a two-tone drive
Kilian Sandholzer, Anne-Sophie Walter, Joaquín Minguzzi +3
The dynamic engineering of band structures for ultracold atoms in optical lattices represents an innovative approach to understand and explore the fundamental principles of topolog…
Suppressing dissipation in a Floquet-Hubbard system
Konrad Viebahn, Joaquìn Minguzzi, Kilian Sandholzer +3
The concept of `Floquet engineering' relies on an external periodic drive to realise novel, effectively static Hamiltonians. This technique is being explored in experimental platfo…
Matter-wave diffraction from a quasicrystalline optical lattice
Konrad Viebahn, Matteo Sbroscia, Edward Carter +2
Quasicrystals are long-range ordered and yet non-periodic. This interplay results in a wealth of intriguing physical phenomena, such as the inheritance of topological properties fr…
Quasiparticle energy in a strongly interacting homogeneous Bose-Einstein condensate
Raphael Lopes, Christoph Eigen, Adam Barker +5
Using two-photon Bragg spectroscopy, we study the energy of particle-like excitations in a strongly interacting homogeneous Bose-Einstein condensate, and observe dramatic deviation…
Connecting Berezinskii-Kosterlitz-Thouless and BEC phase transitions by tuning interactions in a trapped gas
Richard J. Fletcher, Martin Robert-de-Saint-Vincent, Jay Man +4
We study the critical point for the emergence of coherence in a harmonically trapped two-dimensional Bose gas with tuneable interactions. Over a wide range of interaction strengths…