92 citations · 378 across the 9 of their papers we have counts for
9 papers
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…
Low-entropy states of neutral atoms in polarization-synthesized optical lattices
Carsten Robens, Jonathan Zopes, Wolfgang Alt +3
We create low-entropy states of neutral atoms by utilizing a conceptually new optical-lattice technique that relies on a high-precision, high-bandwidth synthesis of light polarizat…
Robustness of topologically protected edge states in quantum walk experiments with neutral atoms
Thorsten Groh, Stefan Brakhane, Wolfgang Alt +3
Discrete-time quantum walks allow Floquet topological insulator materials to be explored using controllable systems such as ultracold atoms in optical lattices. By numerical simula…
Ultra-low birefringence dodecagonal vacuum glass cell
Stefan Brakhane, Wolfgang Alt, Dieter Meschede +3
We eport on an ultra-low birefringence dodecagonal glass cell for ultra-high vacuum applications. The epoxy-bonded trapezoidal windows of the cell are made of SF57 glass, which exh…
Super-resolution microscopy of single atoms in optical lattices
Andrea Alberti, Carsten Robens, Wolfgang Alt +5
We report on image processing techniques and experimental procedures to determine the lattice-site positions of single atoms in an optical lattice with high reliability, even for l…
Quantum Walks With Neutral Atoms: Quantum Interference Effects of One and Two Particles
Carsten Robens, Stefan Brakhane, Dieter Meschede +1
We report on the state of the art of quantum walk experiments with neutral atoms in state-dependent optical lattices. We demonstrate a novel state-dependent transport technique ena…
Bayesian feedback control of a two-atom spin-state in an atom-cavity system
Stefan Brakhane, Wolfgang Alt, Tobias Kampschulte +5
We experimentally demonstrate real-time feedback control of the joint spin-state of two neutral Caesium atoms inside a high finesse optical cavity. The quantum states are discrimin…
Optical control of the refractive index of a single atom
Tobias Kampschulte, Wolfgang Alt, Stefan Brakhane +4
We experimentally demonstrate the elementary case of electromagnetically induced transparency (EIT) with a single atom inside an optical cavity probed by a weak field. We observe t…