224 citations · 2.1k across the 39 of their papers we have counts for
8 papers · 1 filter
Detecting topological invariants in chiral symmetric insulators via losses
Tibor Rakovszky, Janos K. Asboth, Andrea Alberti
We show that the bulk winding number characterizing one-dimensional topological insulators with chiral symmetry can be detected from the displacement of a single particle, observed…
Spectral imaging of topological edge states in plasmonic waveguide arrays
Felix Bleckmann, Zlata Cherpakova, Stefan Linden +1
We report on the observation of a topologically protected edge state at the interface between two topologically distinct domains of the Su-Schrieffer-Heeger model, which we impleme…
Spectral flow and global topology of the Hofstadter butterfly
Janos K. Asboth, Andrea Alberti
We study the relation between the global topology of the Hofstadter butterfly of a multiband insulator and the topological invariants of the underlying Hamiltonian. The global topo…
A high numerical aperture (NA = 0.92) objective lens for imaging and addressing of cold atoms
Carsten Robens, Stefan Brakhane, Wolfgang Alt +5
We have designed, built, and characterized a high-resolution objective lens that is compatible with an ultra-high vacuum environment. The lens system exploits the principle of the…
Fast, high-precision optical polarization synthesizer for ultracold-atom experiments
Carsten Robens, Stefan Brakhane, Wolfgang Alt +3
We present a novel approach to precisely synthesize arbitrary polarization states of light with a high modulation bandwidth. Our approach consists of superimposing two laser light…
Atomic "bomb testing": the Elitzur-Vaidman experiment violates the Leggett-Garg inequality
Carsten Robens, Wolfgang Alt, Clive Emary +2
Elitzur and Vaidman have proposed a measurement scheme that, based on the quantum superposition principle, allows one to detect the presence of an object --- in a dramatic scenario…